oeolatis, apicibus aoutis vel subaoutis, carina sigmatoidea, striis destitutis.
V. ic.
Long. 0,002—0,0026".
Hab. ad oras Xorthumbriae, prope Liverpool (Comber),, Xew Brighton
sands (Donkin). A. alatae proxima et simillima diff. inprimis
lineis nodosis oarinae approximatis deflcientibus.
A. g ig an te a (Amphiprora gigantea Grnn. in Wien. Verh. 1860.
p. 568. T. IV. F. 12.). A. maxima biloba, lobis oblongis, strictura
acuta; carina a fronte visa sigmoidea, nodulo centrali indistinoto, striis
transversis subradiantibus 50 — 55 in 0,001", longitudinalibus distinctioribus.
V. ic.
Long. 0,001".
Hab. in mari Adriatioo (Lorenz).
Color valvae exsiocatae pallidissime lutescens.
S p e c i e s e x t r a f i n e s o b s e r v a t a e .
Amphiprora pulohra Bailey Obs. T. II. F. 16 et 18. — Florida,
navioularis Ehrb. Verb. p. 122. — America,
ornata Bailey 1. o. E. 15 et 23. — America,
eonspicua Grev. Mior. Journ. 1861. T. X F. 16. —
Sierra Leone.
Xereis Levis Mior. Journ. 1862. p. 160. — America,
conserta Levis 1. o. p. 159. — America,
oblonga Grev. Mior. Journ. 1863. T. I. P. 15. —
America.
indica Grun. in Wien. Verh. 1860. T. V. F. 2. —
In mari indico.
I i X I . i § t i g m a i > ] t 0 1 ‘a W allich ( i 8 6 0 ) : Frustula libera
navicularia; valvae lanceolatae, looulatae, marginibus u n d u latis, loculis
centro et margine punctatis.
St. rostrata Wallich in Trans. Mior. Journ. V ili. T. I I . F. 5
et 6. — India.
- lanceolata WaUich 1. o. F. 7 et 8. — India.
B. Individua 3 — 5 vel plura in fasciam conjuncta.
I j X I I . P l e i i r o i s t a u r u m Babenh. ( 1859) : Prustula
Stauroneis, sed 3— 5 — 8 in fasciam oonjuncta, decussatim striata et a
latere visa vittis longitudinalibus flexuosis instructa. Conf. Fig. nostr. 62.
(Stauroneis spec, autor.).
P. acutum (Sm.) Rabenh. (in Hedwigia II. X. 3. T. I. F. B. et
T II. F. 13. Alg. sub Xo. 641. et 847. C. Jan. in Hedwigia II.
X. 5. Schum. in Konigsb. Schriften 1863. p. 190. Stauroneis acuta
Sm. Diat. I. p. 59. T. XIX. F. 187. Pritch. Inf. p. 914. T. VII.
F. 76. Heib. Consp. p. 88. X. 8.). P. plerumque in fasciam con-
junctum, lanoeolatum, utrinque acuminatum, apicibus obtusiusculis,
area laevi valvarum marginem attingente, striis decussatis lineam mediam
non attingentibus, 32—36 in 0,001" ; a latere visum^ late lineare utroque
fine truncatum, tabellare, angulis obtusis, vittis longitudinalibus
flexuosis. V. V.
Long. = 0,0031—0,0068".
Hab. in aqua dulci Saxoniae, Silesiae, Borussiae, Austriae, Bavariae,
Galliae australis, in pluribus loois per Angliam,. Hibormam.
P. Legumen (Stauroneis Legnmen Ehrb. Abh. 1844. p. 135.
Microgeol. T. XXXIX. iii. E. 104. Gregory in Micr. Journ. IV. p. 3.
X. 9. T. I. F. 9. Stauroneis linearis Sm. Diat. I. p. 60. T. XIX.
P. 193.). P. minimum, oblongo-lanoeolatum, triundulatum, apicibus
apiculatis aoutiusoulis, area distincta transverse extensa, valvarum marginem
attingente, striis obsoletis, circ. 48 in 0,001".
Long, ad V « “ ' = 0,0022". -o u i.
b . f o rm a g r a c i l i s (Pleurostaurum lineare Hilse in Babenh. Alg.
X. 1161.), = longa. ^ ^
c. forma curta (Stauroneis Smithii Bréb. in litt. Grun. in Wien.
Verh. 1860. p. 564. T. IV. F. 16.) 0 .0 0 1 0 -0 ,0 0 1 2 " longa, striis
u ltra 60 in 0,001". „ ,.
Hab. in aqua dulci A n g l i a e (Liverpool, Sussex, Shalford), Sootiae
(Elgin, Duddingston L o d i), Hiberniae (Cork, Bantry, Killarney),^ a -
liae (Falaise, Dives), Pedemontii (Montone, Bergamo) ; Silesiae (Strehlen),
Austriae, Moraviae, Saxoniae (Cunnersdorf in Lusat. su p e r.), prope
Francofurtum ad Moenum (Fresenius).
l i A H I . D i a d e s m i s Ktz. (18 4 4 ): Frustala navicularia m
fascias elongatas (biconvexas) arcte conjuncta, et nodulo centrali et terminalibus
distinotis instructa, a latere visa vittis nullis. Conf. Fig nostr. 63.
D. gallica Sm. ( in Ann. and Mag. of Xat. Hst. 1857. p. 11.
T. XI. F. 16.). D. valvis lineari - ellipticis, striis transversis indistinctis
45 in 0 ,0 0 1 ". V. io.
b. minor Grun. (in litt. oum spec.). _ , ■ •
Hab. in aqua duloi prope Havre Galliae; b. in fundo mans adnatici
(Dr. Peiohhardt).