54 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
and so closely united to each other as well as to the first soft ray, as to be scarcely obvious 
except upon dissection ; all the soft rays, except the first, branched. Space between the anal 
and caudal not a tenth part of the whole length. Caudal slightly notched, or hollowed out, 
with rows of scales between the rays. Pectorals pointed, about three-fourths the length of the 
head, with the seventh and eighth rays longest ; rows of scales at the base between the rays: 
in their axillee a somewhat projecting vertical scale or lamina, as in the last species. Ventrals 
immediately beneath the pectorals, also pointed, but shorter. 
CoLour.—“ Above, and the fins, obscure greenish; sides obscure coppery, passing on the belly 
into salmon-colour. Pectorals edged with dull blue. Iris yellowish brown: pupil black- 
blue.” —D.—The skin has dried to a nearly uniform brown. 
Habitat, Chatham Island, Galapagos Archipelago. 
I feel but little hesitation in referring this species, which is one of the many 
new ones obtained by Mr. Darwin in the Galapagos Archipelago, to the genus 
Latilus. The absence of vomerine and palatine teeth requires it to be placed, 
according to Cuvier’s views, among the Scienid@; in which family, there is no 
other group besides Latilus, to which it makes any approach. It agrees with 
that genus in its general form, and in many of its particularities; it has the same 
form of snout, mouth, maxillary, and dentition; the same scaly lamina in the 
axilla of the pectorals; the same long undivided dorsal and anal fins, with only 
two very small anal spines, so closely united to the first soft ray as to be easily 
overlooked. But it may be at once distinguished from the L. argentatus and the 
L. doliatus, the only two species described by Cuvier and Valenciennes in the 
body of their work, by its much more numerous soft rays in the dorsal and anal 
fins. From the L. jugularis last described, which resembles it in this respect, it 
differs in its thoracic ventrals, shorter head, naked snout and suborbital, and 
notched caudal: the profile also falls less obliquely. There is only one specimen 
in the collection, a dried skin and rather injured. 
Heviases Crusma. Val. 
Heliases Crusma, Cuv. et Val. Hist. des Poiss. tom. ix. p. 377. 
Form.—Oval, very much compressed. Back considerably elevated, particularly at the nape, whence 
the profile descends very obliquely, and, with the exception of a slight concavity before the 
eyes, in nearly a straight line. Greatest depth at the commencement of the dorsal, equalling 
nearly half the entire length, caudal excluded. Head contained four and a half times in the 
same. Snout short: mouth small, a little protractile : lower jaw rather the longest. A narrow 
