136 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
torals reach to the ventrals, and are contained about once and two-thirds in the length of the 
head. Caudal deeply forked; the lower lobe a little longer than the upper one: the base 
appears to have been covered with minute scales. Above the pectorals is a thin membrana- 
ceous lanceolate scale, more than half the length of the fin: a somewhat similar scale in the 
axille of the ventrals, but shorter in proportion ; another below those fins. 
Cotour.—* Body silvery: dorsal scales iridescent with green and copper: head greenish: 
tail yellow.”—D. 
A second specimen agrees with the above in form, but is smaller, measuring only 7} inches. 
The colours, when recent, according to Mr. Darwin’s notes, were as follows :—‘* Scales silvery 
iridescent; back especially greenish; caudal fin yellow: remarkable for a circular dark green 
patch behind the gill-cover.”—D. 
Habitat, Bahia Blanca. 
This species was caught by Mr. Darwin in the net, on a sandbank, at Bahia 
Blanca. It is well characterized by its strongly-pectinated scales, and does not 
appear to have been noticed by authors ; though it would seem in that respect to 
have some affinity with the Clupea fimbriata of Bowdich.* 
ENGRAULIS RINGENS. Jen. 
E. capite compresso, grandiusculo, quartam partem longitudinis totius equante: ros- 
tro acuto, ultra maxillam superiorem mediocriter prominulo ; mandibuld angustd, 
dentibus lateralibus (ut etiam in maxilla) minimis: corpore compresso : pinnis ven- 
tralibus infra, viw ante, initium pinne dorsalis exorientibus : squamd longissim 4 
membranaced super pinnam pectoralem retrorsum producta. 
Diss Avo): 'C., 195 Seo. B16: V. 7: 
Lone. unc. 5. 
Form —Closely resembling the common Anchovy, but the head decidedly larger and longer, being 
one-fourth of the entire length.t Eye larger, but bearing an equal proportion to the size of 
the head; also rather nearer to the tip of the snout in consequence of this last not being 
so acute and much produced. Lower jaw rather narrower, from the greater compression of 
the head and body. Maxillary, and its fine serratures on the edges for teeth, similar. 
The depth of the body is about one-sixth of the entire length. 'The dorsal commences 
at the middle point of the length, reckoning this last to the base of the caudal fork, and 
terminates a little before the commencement of the anal: the first ray is not half the length 
of the second and third, which equal three-fourths of the depth: the fifth and succeeding rays 
become gradually shorter than those which precede. ‘The first ray in the anal is likewise very 
short, and scarcely one-third of the next following. The ventrals arise almost directly under 
the first ray of the dorsal, being scarcely at all in advance; when laid back, they do not 
reach half-way to the anal. Above the pectoral is a long membranaceous scale equalling, or 
very nearly, the fin itself. 
* Bacursions in Madeira, p. 234, fig. 44. 
+ In the &. enchrasicholus, it is hardly one-fourth of the length, excluding caudal. 
