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the opercle, and lower down on this last piece some very deep striæ , running parallel to its
junction with the preopercle, as in the Pilchard, but still more strongly marked.
The commencement of the dorsal is very little anterior to a middle point between the end
o f the snout and the base of the middle caudal rays. T he ventrals are beneath the posterior
half of the dorsal as in the Pilchard. T here are the same two elongated scales on each side of
the caudal as in that species. T he scales on the body, however, arc much smaller than in the
Pilchard, with their free portions striated, the basal portions marked with some irregular
curved lines running in a transverse direction towards the median line of the scale.
D. 11 ; A. 18 or 19 ; C. 19, &c. ; P. 18 ; V. 8 .
Length 10 inches 6 lines.
H abitat, Lima, San Lorenzo Island.
A l o s a p e c t in a t a . Jen,
P l a t e . XX V.
A. corpore ovali, altitudine prope tertiam partem longitudinis oequante : ventre carinato,
serraturis, præsertim inter pinnas ventxales et analem, acutis : maxillis suhæ-
qualibus, edentulis : preoperculo venoso ; opex'culo striato : squamis pectinatis : pinnis
ventralibus paulo axite dorsalem exorientihus.
D. IG ; A. 21 ; C. 19, &c. ; P . 17 ; V. 7.
L o n g . unc. 12.
F o r m . — Of an oval compressed form, the depth very considerable, equalling very nearly one-third
of the entire length. H ead contained about three times and three quarters in the same.
Abdomen sharply carinated, with strong serratures, especially between the ventrals and anal.
Jaw s nearly equal, perhaps the lower one a little the longest ; interm asdlary deeply notched ;
no apparent teeth anywhere. Eyes rather high, partly covered both anteriorly and posteriorly
by a membranaceous veil ; their diam eter about one-fifth the length of the head ; more than
one diameter between them and the end of the snout. Subopercle obliquely rounded off at
bottom, but the cui-vature of the posterior margin of the opercle and subopercle taken together
not very considerable. Preopercle marked with vein-like ramifications; opercle similarly
veined, and also striated below, as in the species last described, though more finely. Scarce
any trace of a lateral line.
Scales moderately Large, thin and membranaceous. One from the middle of the side of
a sub-oblong form, the hinder angles rounded, its length only two-thirds of its breadth; the
greater portion of the surface marked with exceedingly delicate striæ , scarcely visible without
a strong lens, the anterior margin pectinated, and with a slightly projecting lobe in the
middle. T he scales as they approach the tail, become longer in proportion to their breadth,
the basal margin more rounded, and sometimes with a strongly projecting lobe in the middle.
T he pectinations are longest on the scales covering the nape.
T he dorsal commences a little behind the middle point of the oval o f the body, and the
ventrals are attached a little in advance of that fin. T he anal commences a little behind the
termination of tho dorsal, and reaches to the commencement of tbe fleshy part of the tail : the
last ray in both dorsal and anal is slightly lengthened beyond the preceding ones. T h e pec-
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III