IB
M
CLASS ARACHNIDA.
0 E D E R -A D E L A RTH E 0 S 0 M A T Westw.
FAMILY—CYPHOPHTHALMIDYE.
This family, hitherto composed of a single genus, CyphophthalmuSj founded upon a single species, C. chricornis,
inhabiting the caves of Camicia, was proposed by Herr Joseph in the Berlin Eutomologische Zeitung,
vol. xii, p. 241 and p. 269, pi. i. It is nearly allied to Phalangiinn.
A second species of the group was forwarded to me by Herr Snellen van VoUenhoven, from the Eoyal Museum
of Leyden, as a native of Sumatra, and as a species of Ti-ogulus. As it differs in several respects from the type
of the family, I have formed it into the
G E I T O S — S T Y L O C E L L U S .
(PLATE XXXVII, FIGS. 7, 7 a, corpus iufi-a visum ; fig. 7 6, idem e latere.)
Cephalothoras dorso integro, absque impressione semieirculari dorsali ; lateribus in eornu.a duo brevia porreeta,
apice ocelligero ; chelicers palpis breviores, articulo basali dimidium articuli cheliferi longitudine ^quanti ;
chel03 simplices nec serratie : spiiacula ad basin abdominis rotundata nee lunata ; pedes 8, fere sequales, tibiis
biarticulatis, tarsis biarticulatis, articulo basali brevi, secnndo multo longiori crassiori subtus fisso, ung-ue unico
ternainali instrueto (fig. 7 c) ; pedes antici modice elongati absque spina ad angulum internum articuli basalis ;
abdomen ovale convexum e segmentis septem coalitis, formatura.
SPECIES 1—STTLOCELLUS SUMATEANUS,
PLATE XXXVI I , FIG. 7.
Convesus totus purpurascenti-piceus, opacusj undique granulis minutissimis crebrissimis indutus, haud
setosus.
Long. corp. lin. 3|.
Habitat ; Sumatra. In Mus. Eeg. Lngdun. et in Mus. Hopeiano Oxoniie.
I have seen a closely-allied species of a ferruginous colour from Java in the collection of the British
Museum.
' Forty years ago I proposed this term for those Trachearian Ai-achuida which have the 'abdomen anmilated,
although occasionally in au indistinct manner,' the other orders of Arachnida being named by Dr. Lcach—1. Dimorosomata
(spiders) ; 2. Polymerosomata (scorpions) ; 3. Monomerosomata (mites) ; and 4. Podosomata (Pyconogoniim and
Nymphon). The term Ai-throgastra has recently been applied to my Adelarthrosomata, to which, notwithstanding their
different mode of respii'ation, the scoi-pions have been unsatisfactorily added.
FAMILY—TROGULID^.. 201
FAMILY—CRYPTOSTEMMIDYE.
The Genus Cryptostemma of Guérin-Ménevillc is formed of a single species received by M, Guérin from
the late Ilerr Westermann as a native of Guinea.
I t is nearly allied to Phalangium and Trogulus, but the eyes are wanting and the chelicera; are porrected
and pediform ; the cephalothorax is square, with the anterior margin porrected in form of a clypeus ; the abdomen
is as wide as the cephalothorax, aud twice its length, being oblong, with the posterior angles rounded.
The leg's are very unequal in length, the second pair being the longest, with 4- or S-jointed tarsi (Guérin-Mén.
Rev. Zool. 1838, p. 11; Diet. Pittor, d'Hist. Nat. pi. DXXXIX, fig. 7; Walckenaer, AjDt. iii. p. 131, pi. XLVI l
(not XXXIX) , fig. 4).
An aUied form was captured by Mr, H. W. Bates in his Amazon researches^ which constitutes a distinct
genus, which I have named
GEOTS—CRYPTOCELLUS.
Corpus breve depressum; abdomiue fere circulare et plano; oeuli vel ocelli obsoleti ; cephalothorax antice
labro distincto, mobili, verticali instructus, os omnino claudenti ; os in cavitate antica oceidtans, cheliccris duabus
minimis (fig. 5 b), margine interno cbelarum denticulato_, interna breviore intus dente medio majori armata.
Palpi cum sterno segmenti, pedes antieos gerentis, arete coaliti, 4-articulati, articulo secundo minuto, tertio et
quarto longitudine fere lequalibus, ultimo gracihori ad apicem ungue parvo instrueto (fig. 5 a, os cum labro
elevato, cavitatem oralem, palpum et basin pedis primi paris estendenti) ; dorsum cephalothoracis breve-obovatum,
subconvexum, linea longitudinali media depressa notatum ; abdomen quasi e segmentis 4 compositum,
primo brevi ; tribus ultimis fere asqualibus, apice tuberculo parvo (ano ?) aperto instrueto ; pedes 8 mediocres,
primi paris breviores, secundi paris longiores, tarsis antieis 1-artieulatis ; secundi et quarti paris, 5-articulatis ;
tertii paris 4-artioulatis ; articulo ultimo compresso apice truneato et profunde impresso, unguiculis duobus
in margine supero impressionis affixis, coxis pedum singuli paris planis, in medio coalitis, sternum formantibus.
SPECIES 1—CRYPTOCELLUS FCEDUS.
PLATE XXXVI I , FIG, 5.
Totus fuseus, obscurus : cephalothoracis margine, margineque abdominis parnm elevato ; segmento secundo
abdominis supra impressionibus duabus parvis discoidaUbus liueaque laterali obliqua, ex angulo antico laterali
prodeunte, notato ; segmentis duobus ultimis longitudinaKter inter medium et latera biimpressis ; pedibus
paullo setosis.
Long. corp. lin. 2^.
Habitat; Amazonia (Bates). In Mus. Hopeiano Oxoniai.
FAMILY—TROGULIDYE.
GENUS—TROGULUS.
I t is with great pleasure that I am here enabled to introduce this interesting Genus into the British Fauna,
a new species having been captured in Dorsetshire by the Rev. Piekard Cambridge, who has kindly placed
it in the Hopeian Collection, and allowed me to describe and figure it in this work.
The Genus is composed, for the most part, of European species, the type^being the Phalanfjimi tricarinatum
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