228 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



MANCALIAS.* 



Mancalias, Gill, Proc. U. S. Nat. Mus., v. 1, pp. 227, 228, 1878. 

 Type: M. urauoscopus = Ceratias uranoscopns, Murray, Wyvllle Thompson, Yoyage 



of tlie Challenger, v. 2, p. 67, with tig., 1878. (Am. ed.) 

 Atlantic Ocean (taken at a depth of 2,400 fathoms), between Canary and Cape Verde 



'^^'^°'" ONEIRODm^. 



ONEIRODES. 



Oneirodes, Lilfken, Overs, over d. K. Danske Vidensk. Selsk. Forhandl., 1871, pp. 5G-74 

 (fr. pp. 9-18). 

 Type : O. Eschrichtii Liitken. 

 Deep sea oflf Greenland. 



HIMANTOLOPHIN^. 



HIMANTOLOPHUS. 



Himantolophus, Eeinhardt, K. Danske Vidensk. Selsk. Nat. eg Math. Afh., 4. rsekke, 

 V. 7, p. 74, 1837 ; LUtken, 1878. 

 Type: H. Grcenlandicus iJeiwftardt. 

 Deep sea off Greenland (adults). 



CORYNOLOPHUS. 



Type : Corynolophns Reinhardtii = Himantolophus Reinhardtii LutJcen. 



Deep sea off Greenland (adult), and open sea between Africa and America (young) ? 



^G^ONICHTHYlIs'iE. 



^G^ONICHTHYS. 



^ga;onichthys, T. E. Clarke, Trans. New Zealand Institute, v. 10, p. 245, 1878. 

 Type : ^. Appellii T. E. Clarke. 

 Deep sea off the island of New Zealand. 



MELANOCETINJ]]. 



MELANOCETUS. 



Melanocetns, GUntJier,FTOc. Zool. Soc. London, 1864, p. '.W. 

 Type : Melanocetus Johnsonii Giinther. 

 Deep sea off the island of Madeira. 



lu the words of Liitken, t " tbe general form and the physiognomy es- 

 pecially are quite similar in the [known] genera; common to all is, also, 

 the absence of ventral fins, of the lateral line and its ramifications, of the 

 air bladder, of the pseudobranchijB, and of the teeth of the lower pha- 

 ryngeal and palatine bones ; % the .smallness of the eyes and of the pectoral 



* Mancalias, from mancus, defective, with a quasi-diminutive termination, to corre- 

 spond with Ceratias. The single specimen obtained was only 90 millimetres long. 



t Vidensk. Selsk. Skr., 5. rsekke, Naturv. og Math. Afd., lite Bd. V, fr. tr.,p. 343. 



t In Melanocetus, according to Giinther, " the vomer is armed with a transverse series 

 of single teeth, and extends across the whole width of the roof of the mouth ; the 

 palatine and pterygoid teeth are situated at some distance behind the vomer, and form 

 two bundles irregular in form "; but, according to Liitken (and since admitted by Giin- 

 ther), " the so-called palatine and pterygoid teeth " " belong in reality to the upper 

 pharyngeals." 



