[35] FLOUNDERS AND SOLES. 259: 
Genus XVII.—ARNOGLOSSUS. 
Arnoglossus Bleeker, Comptes Rendus Acad. Sci. Amsterd., xiii, 1862, 6 (Arnoglossus 
laterna). 
TYPE: Pleuronectes arnoglossus Bloch & Schneider= Plewronectes la- 
terna Walbaum. 
This genus is composed of several species of small translucent floun- 
ders, found in the Mediterranean and the Hast Indies. They much re- 
semble the species of Citharichthys, which they represent in the Old World 
fauna, the arch of the lateral line in Arnoglossus constituting the chiet 
difference. The characters of the different European species have not 
been well set forth by authors, and possibly all the nominal species are 
reducible to two or three. 
We find also in the Zoological Record a reference to Arnoglossus 
_ soleiformis Malm, Goteborg. Mus., Arsskr., ili,1881, 24. We have not 
seen the original description of the fish briefly noticed in this paper, 
and know nothing of the species thus named. We have also provis- 
ionally placed in Arnoglossus two American species which we have not 
seen. These have been referred by their describers to other genera, 
Hemirhombus and @itharichthys ; but as both have uniserial teeth and 
an arched lateral line, they would belong technically to Arnoglossus 
rather than to either of these groups. But the one (jfimbriatus) differs 
from Arnoglossus in the small scales and tubercular gill-rakers, while 
the other has small, firm, strongly ctenoid scales, nothing being said of 
its gill-rakers. Possibly the two should constitute one or two additional 
genera between Arnoglossus and Azevia; but we do not wish to attempt 
to define these groups without having seen any of their species. 
Bleeker has questioned the propriety of distinguishing Arnoglossus 
from Platophrys, as the broad interorbital characteristic of Platophrys is 
subject to much variation. As the two genera differ also in various 
other respects of form, dentition, squamation, &c., we think it best to 
keep them separate. 
ANALYSIS OF SPECIES OF ARNOGLOSSUS. 
a. Mouth small, the maxillary reaching front of pupil, its length about 3 in head; 
scales rather large, thin, and caducous, weakly ctenoid ; 40 to 60 in the lat- 
eral line; gill-rakers slender. (Arnoglossus. ) 
b. [Dorsal fin with four anterior rays produced. D. 95, A.77, lat. 1.60. Maxillary 
31 in head; interorbital space a very narrow, sharp ridge. Depth 23 in length. 
Color uniformyerayishee (Gunther). 2. soos esos oe 2 = sae LOPHOTES, 31. 
bb. Dorsal fin with its second ray much produced, nearly as long as head; body 
rather deep, the depth 24 in length; maxillary about reaching front of pu- 
pil, 3 in head; eye large, 4 in head; interorbital space not very narrow, with 
a median groove; D. 80 to 90 (83 in specimens examined), A. 60 to 67 (63 in 
our specimens) ; lat. 1. about 55. Curve of lateral line 34 in straight part; 
gill-rakers slender and weak, X-+-6. Vertebre 10+-28—38. Color dark brown, 
with darker markings; fins spotted ....-......-..-.--.---.GROHMANNI, 382. 
