REPORT OF COMMISSIONER OF FISH AND FISHERIES. [52] 



610. Sidera fuuebris' Ranzani. P. (580 6.) 



611. Sidera moringa Cuvier. P. (580 c.) 



Order S.— ENCHELYCEPHALP (0.) 



Family LIX.— CONGlilD^.^ (53 part.) 



171.— ICHTHYAPUS" Barueville. 



612. Ichthyapus selachops .Jordan &, Gilbert. P. 



172.— LETHARCHUS Goode & Bean. (168 6.) 



613. Letharchus velifer Goode & Bean. S. (580 6.) 



173.— CALLECHELYS5 Kaup. (169) 



614. Callechelys scuticaris Goodo & Beau. S. (581) 



615. Callechelys teres Goode & Beau. S. (581 6.) 



616. Callechelys bascanium'^ Jordan. W, 



' The species called in the Synopsis (p. 895) Mnr<ena afra should stand as Mura"iia 

 or Sidera funehris. 



In life thi.s species is bright yellowi.sh green, with some oblique dark streaks on the 

 fins. It roaches a very large size and is much dreaded by fishermen. To its synonymy 

 add: (hjmnothorax funebris Ranzani, Nov. Coram. Ac. Sci. Inst. Bouou., IV, 1840, 76; 

 MitraiM lineopinnis Richardson, Voy^. Erebus & Terror, 1844, 89; Murama ivfernalis 

 Poey, Memorias Cuba, II, 347, 1861; Miirana a/ra Giiuther, IX, 123; apparently not 

 (Ij/iniiofhorax afer, Bioch, Ausl. Fischo, 1797, IX, 85, tab. 417, a fish from Guinea, de- 

 scribed as being brown, marbled, and banded with white. The present tpecies is al- 

 ways unicolor, green in life, and brown in spirits.) 



■Knchelijcephali Cope, Trans. Am. Philos. Soc, 1871, 455. 



■• The family o( AngiiiUidw, a.s given in the text, is not a natural one. For the present 

 we may subtract the aberrant genera Anguilla and Simenchelys, leaving the remaining 

 genera in one group, Congrid(v. 



■• IcHTHYAPUS Barneville. 

 {Ophtsurapliis Kaup; Apierichihys Dumdril.) 



(Barneville, Revue Zoologique, 1847, 219; type Ichthyapus acntirostris Barneville.) 



This genus differs from Ophichthys chiefly in the entire absence of fins. The snout 

 projects beyond the small mouth, giving a shark-like physiognomy, and the teeth are 

 small, mostly uniserial. {"Ix^ivi, fish; anovi, without feet.) Ichthyapus selachops = 

 Apterkhthys selachops .Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 356. Cape San 

 Lucas. 



" Callechelys Kaup (see Synopsis, p. 897), is distinguished from Coecula by the 

 development of the dorsal fin, which begins on the head. In Coecula {Sphagehranehus), 

 it begins behind the gill opening. 



^Callechelys hascanium Jordan. 



Dark brown, nearly uniform ; fins a little paler. Body extremely slender, subterete, 

 its greatest depth little more than two-fifths length of head ; head short; snout 7 in 

 head; mouth very small, the lower jaw thin, included, not extending to the anterior 

 nostril, which is in a short tube; teeth short, subconic, bluntish, a little unequal, 

 tlii'ir points directed backwards ; lower teeth nearly uniserial ; upper teeth uniserial 

 laterally, partly biserial anteriorly ; vomerine teeth forming a rhombic patch. Eye 

 moderate, its length more than half that of snout, its center nearly over middle of 

 np])er jaw; cleft of mouth 3f in length of head. Gill openings vertical, about as 

 wide as isthmus ; its upper edge on level of upper base of pectoral ; ])ec1oral developed, 

 Bmall, a little broader than long, nearly as long as snout ; dorsal tin very low, begin- 

 ning at a point midway between front of eye and gill opening ; anal similar to dorsal. 



