REPORT OF COMMISSIONER OF FISH AND FISHERIES. [56] 



Family LXI.— SIMENCHELYIDJ!:. 



183.— SIMENCHELYS Gill. (174) 



639. Simenchelys parasiticus Gill. B. (589) 



Family LXIL— SYNAPHOBRANCHID^. (54) 



184.— SYNAPHOBRANCHUS Joliusou. (176) 



640. Synaphobranchus pinnatus Gronow. B. (590) 



185.— HISTIOBRANCHUS' Gill. 



641. Histiobranchus infernalis Gill. B. 



Family LXIII.— NEMICHTHYID^ Richardsou. (56) 



186.— NEMICHTHYS Richardson. (178) 



642. Nemichthys scolopaceus Richardson. B. (592) 



643. Nemichthys avocetta Jordan & Gilbert. B. C. (593) 



187. -LABICHTHYS ^ Gill & Ryder. 



644. Labichthys carinatus-' Gill & Ryder. B. 



645. Labichthys elougatus^ Gill »fc Ryder. B. 



1 Histiobranchus Gill. 



(Gill, Proc. U. S. Nat. Mus., 1883, 255; type, Histiobranchus infernalia Gill). 



" Synaphobranchid, with the dor.sal fin protracted almost as far forward as the base 

 of the pectoral fin, and an isolated small patch of teeth on the vomer, behind that on 

 its head." {"Htiov, sail, i. e., dor.sal fin ; jSpayxod giUj dorsal commencing above gill 

 opening). 



Hi8tio})ranc1ui8 infernalis Gill, Proc. U. S. Nat. Mus., 1882, 255. Gulf Stream, lati- 

 tude 38'^, at a depth of 1,731 fathoms. 



-' LABiciiTnY.s Gill «&, Ryder. 



(Gill & Ryder, Proc.U. S. Nat. Mus., 1883, 261 ; type, LdhicUhya carinatus Gill & 

 Ryder.) 



" Nemichthyids with the head behind the eyes, contracted, with very attenuated 

 .jaws, the hranchiostegous membrane connected to the throat, and the branchial ap- 

 ertures limited to the sides, with small conical teeth in a band along the vomer, and 

 otherwise dentition of Nemichthj/s, a black epidermis, and the tail abruptly truncated. 

 {Aaftii, a pair of forceps ; /^Ot)?, fish.) This genus and the two which follow are very 

 insufficiently described. In none of them is the character of the posterior dorsal rays 

 described. 



""Lahichthiis carinatus Gill «fe Ryder, Proc. U. S. Nat. Mus., 1883,261. Gulf Stream, 

 latitude 41°, at 906 fathoms. 



^ Lahichthys elongatus Gill & Ryder, 1. c, 1883, 262. Gulf Stream, latitude 39°, at 

 1,628 fathoms. 



