EEPORT ON THE DEEP-SEA FISHES. 253 



Nettastoma melamtrum, Eaf. 



Not uncommon in the Mediterranean, and most probably descending to depths 

 similar to those of its congeners. 



Nettastoma parviceps (PI. LXIII. fig. A), 



Nettastoma parviceps, Guntb., Ann. and Mag. Xat. Hist., 1877, vol. x.x. p. i4G. 



Head small, its length being two-fifths of the distance between the gill-opening 

 and vent (more than one-half in Nettastoma melanurum). Dorsal fin commencing in 

 advance of the gill-opening. In other respects similar to the Mediterranean species. 



Habitat. — South of Yedo, Station 232 ; depth, 345 fathoms. One specimen, 

 26| inches long. 



Nettastoma procerum. 



Nettastoma proce)~u,in, Goode and Bean, Bull. Mus. Comp. Zool., vol. .k. 1883, p. 224. 



Distinguished by a long filamentous rostral tip, the length of which is equal to 

 twice the diameter of the eye. Tail twice as long as trunk and head. 



Three specimens, from 16 to 26 inches long, were obtained by the U.S. steamer 

 " Blake," in lat. 33° 35' to 40° 0' N., long. 76° 0' W.; at depths of 178 and 647 fathoms. 



Group S y n a p h o b r a n c h i n a, Gthr. 

 Synaphobranchus, Johns. 

 SynapJiobranchus pinnatus (PI. LXII. fig. A). 



Murxna pinnata, Grouov., Syst. ed. Gray, p. 19. 



Sijnaphohmnchus kaupii, Jolmson, Proc. Zool. Soc. Lond., 1862, p. 1G9. 



„ 2nnnatus, Giinth., Fish., voL viii. p. 23. 



,, „ Goode and Bean, Bull. Essex Inst., vol. xi., 1879, p. 2G ; Bull. 



Mus. Comp. Zool., vol. x., 1883, p. 223. 



„ affinis, Guuth., Ann. and Mag. Nat. Hist., 1877, vol. xx. p. 445. 



The eye is one-half or a little less than one-half of the length of the snout ; the 

 length of the body is contained twice or twice and a third in that of the tail. The 

 dorsal fin commences above or at a very short distance behind the vent. Koot of the 

 pectoral midway between the extremity of the snout and the vent. Length of the 

 pectoral fin half that of the head. Scales rudimentary, lanceolate, oblique ; cheeks 



