20 "TERRA NOVA'' EXPEDITION. 



In the Atlantic C. yvac'dix, Lowe, the body is less deep, the snout shorter, and the 

 eye larger; also the maxillary is completely hidden, and the pectoral tin extends 

 beyond the origin of the anal. Owing to the imperfect condition of the types of 

 (\ i-aerideuH the number of scales cannot be certainly stated, but they seem to be 

 larger than in ' '. t/raeilis, which has 58 To 66 in a longitudinal series. 



Since niv revision of the genus Ciibicepx (Ann. Mag. Nat. Hist. (7) x, 1902, 

 p. L22), when tour species were recognised, Jordan and Snyder have described a 

 species from Honolulu under the name Ariomma lurida. This is figured by .Ionian 

 and Evermann (Bull. CJ. S. Fish. Comm. xxni, L905 p. 217, pi. xxxvn), and is 

 evidently closely related to Cubieepx vaucirndiatus, Giinth. and C lirecimanu-s, Klunz. 



Brotulidae. 

 Pyramodon, Radcliffe. 



Pyramodon, Radcliffe, Proc. U.S. Nat. Mus. xi.iv. 1913, p. 175. 

 Cynophidium, Regan, Ann. Mag. Nat. Hist. (8) xni. 1914, \>. Hi 



Head and bodv naked, compressed; tail tapering; no lateral line. Head unarmed, 

 without large tnuciferous channels, smooth and convex above; eyes well-developed; 

 no barbels. .Mouth large, protractile, terminal, with the lower jaw included; teeth 

 subcorneal, in a narrow band in praemaxillaries, uniserial and unequal in lower jaw and 

 on palatines : upper jaw with a. rather wide toothless interspace between a pail' of 

 canines, which are outside the mouth when it is closed : lower jaw with a pair of 

 strong recurved anterior canines: vomer with a very strong curved canine followed by 

 a tew smaller teeth. Gill-membranes separate, free; 7 branchiostegals ; 4 nills ; 

 pseudobranchiae very small. Vent and origins of dorsal and anal tins a short distance 

 behind head; vertical tins continent at end of tail; no distinct caudal tin ; pectorals 

 well-developed ; pelvics jugular, a pair of simple filaments. 



This genus differs from Sni/deridia, Gilbert, 1905 (Bull. I'. S. fish. Comm. 1903, 

 [i. 654), in the presence of pelvic tins. In many respects these two genera seem to 

 connect the Brotulidae with the Fierasferidae, but I have ascertained that Pyramodon 

 agrees with the Brotulidae in the structure of the upper surface of the skull, the 

 supraoccipital separating the rather small parietals. 



28. Pyramodon //um-tatu*, Regan (PI. XII, fig. :'>). 



Cyiwphidium yunctatum, Regan, Ami. Mag. Nat. Hist. (8) xm, 1914, \<. It',. 



Depth of body nearlv equal to length of head, which is (I in the length of the 

 fish : distance from end of snout to origin of dorsal tin 4 , ! . Snout, diameter of eye 

 and interorbital width subequal, about I the length of head. Maxillary extending 

 beyond eye. Three gill-rakers and several rudiments on lower part of anterior arch. 

 Origin of dorsal tin slightly in advance of vent ; pectoral i length of head: pelvics 

 ' length of head, or .', distance from their base to origin of anal. Olivaceous, powdered 

 with little dark spots. 



