1941 CATALOGUE OF FISHES OF TORTUGAS *■> 



mottling on iris and sclerotic is of the same order as on the skin about the eye, 

 and extends under the margin of the opaque skin a distance equal to long 

 diameter of pupil. 

 Gulf of Mexico. W. H. L. 



Citharichthys arctifrons Goode 



More than 200 specimens, up to about 100 mm., were taken in ten hauls in 

 54 to 246 fathoms. The range is undetermined, as the haul at the greatest depth 

 mentioned ended in 144 fathoms. This fish lives at greater depths, however, than 

 Citharichthys cornutus. 



D. 81 to 84; A. 65 to 68 in 2 specimens; depth 2.6 to 2.8; prominent spine at 

 proximal end of maxillary of left side, of which no mention is made in the 

 original description; knob at mandibular symphysis. 



The sexes are distinguishable by the presence in the female of a postanal ex- 

 tension of the coelomic cavity containing the ovaries, which is distinctly visible 

 through the translucent tissue. 



Gulf Stream. W. H. L. 



Citharichthys cornutus (Gunther) 



Rhomboidichthys cornutus Gunther, Challenger rept., Zool., vol. 1, 1880, p. 7, pi. 2, fig. 



B— Brazil. 

 Citharichthys unicornis Goode, Proc. U. S. Nat. Mus., vol. 3, 1880, p. 342 — Gulf Stream 



SE. of New England. 



Rather common; sometimes 50 or more were taken together in 44 to some- 

 what less than 100 fathoms; apparently most abundant near 65 fathoms. The 

 largest obtained was only a little more than 90 mm. long. 



D. 75 to 79; A. 60 to 62 in 6 specimens; scales in lateral line 40 to 41 ; depth 2.1 

 to 2.2, not "slightly less than its length," as is stated by Goode and Bean (Ocean. 

 Ichthyol., 1895, p. 444) and repeated by Jordan and Evermann (Bull. U. S. Nat. 

 Mus., No. 47, pt. 3, 1898, p. 2683). 



The sexes differ greatly in appearance. Mature males are slightly deeper, with 

 eyes separated by a space equal to long diameter of pupil; with a short spine at 

 mandibular symphysis, 2 before each eye, 1 on end of maxillary, and 1 projecting 

 half diameter of eye beyond contour of body between bases of first and second 

 dorsal rays. In the female the interorbital space is exceedingly narrow, the pre- 

 orbital spines are not developed, and the others are evident only upon close 

 inspection. 



At a length of about 55 mm. and upward the sexes are separable at a glance, 

 for the postanal extension of the coelomic cavity, marking the female, is then 

 visible externally. 



Gulf Stream. W. H. L. 



Citharichthys macrops Dresel 



A single specimen, 145 mm. long, was obtained in the 10-fathom channel east 

 of Loggerhead bank. 



