DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 411 



In ;i distance equal to length of bead 32 rays were counted in tiie dorsal lin; in the 

 anal fln, 22. 



Color, lirown; abdomeii and lower part of head in young blackish. 



CETONURUS, Guntlier. 

 Celonurua (as subgenus), OCntiier, Challenger Report, xxii, 1887, 124, 143. 



A Macrurus-liko form, with immense, thick, angular head, with cavernous bones; with 

 quadrate massive snout, and with trunk exceedingly short, running into a short, much 

 compressed, aud low tail immediately behind the vent. First dorsal with about 10 spines, 

 inserted over or in advance of the origin of the pectorals; the second and longest spine 

 slender, obscurely serrated. Ventrals moderate, inserted under or in advance of insertion 

 of pectorals. Head with dense, flaccid skin, thickly covered with small villous scales; 

 scales of body with a few long, slender, curved spines. No lateral line. A series of larger 

 scales along base of second dorsal, which is weak and low. Bones thin and flexible. 



The tyi)e of this genus or subgenus is Cetonurics crassicepj, Giinther (Challenger Report, 

 XXII, 143, pi. xxxvii; Ann. and Mag. Kat. Hist., ii, 1878, 25), taken by the Challenger north 

 of the Kermadec Islands, iu 520 fathoms. 



CETONURUS GLOBICEPS, Vaillant. (Fig. 344.) 



Marninifi glohiceps, Vaillant, La Nature. 1884, No. 560. 



Ilijtmnoceplialns glohiceps, Vaillant, Expcd. Scieut. Travailleur et Talisman, 214, 38G. 



Uijmenocephnhis crassiceps, Vaillant, oj). cil., 214, pi. xx, tig. 1. 



Head and anterior part of body very large; the greatest height two-elevenths, its 

 greatest thickness one-twelfth of total length. Head globular in form, its length one-fifth 

 that of the body. Snout turgid, obtuse. Mouth moderate, inferior. Body greatly con- 

 tracted behind the vent, which is in vertical from posterior end of first dorsal. 



Diameter of eye about one-fourth the length of the head. Width of the iuterorbital 

 space two-fifths the length of the head. Barbel small and slender. 



Opercula covered by thick skin, only visible upon dissection. Small rough scales cov- 

 ering entire head; those upon body also small, very rough; a row of much stronger ones 

 along the base of the second dorsal. Lateral line not perceptible. About 200 scales in 

 longitudinal row, 51 in vertical row. 



First dorsal small, its second spine slender, covered with weak serrations. Second 

 dorsal low and with feeble spines, its origin separated from the end of the first dorsal by a 

 space equal to twice the length of the base of the latter. Anal much higher than tlie second 

 dorsal, its anterior rays much the longest; its origin ueai'ly under that of the second dorsal. 

 I'ectorals moderate, falciform, reaching beyond origin of anal. Ventrals small, in advance 

 of the pectorals. 



Kadial formula: D. Ii, 9+ ?; A. 103?; V. 10. 



The French expedition obtained 17 examples in the Gulf of Gascony at 1,000 meters, 

 on the coast of Soudan at 1,13!) to 1,435 meters, and off the Azores at 2,01)5 meters. It 

 has not yet been found in the Western Atlantic. 



CHALINURA, Goode and Bean. 



ChaVutura, GooDE and Bean, Bull. ilus. Comp. Zoiil., x, 199. 

 Clialiniiriis (subgenus), Gintiier, Challenger Report, xxil, 144. 



Scales cycloid, fluted longitudinally with slightly radiating stria\ Snout long, broad, 

 truncate, not much produced. Mouth lateral, subterminal, very large. Head without 

 prominent ridges, save the subocular ones aud those upon the snout; the suborbital ridge 

 is not joined to the angle of tlie preoperculum. Teeth in the upjx'r jawiu avilliform baud, 

 with those in the outer series much enlarged ; those in lower jaw uniserial, large. No teeth 

 on vomer or palatines. Dorsal spine serrated. Pseudobranchia' present, but small. Gill 

 rakers spiny, depressible, stout, in double series on the anterior arch. Braiichiostegal 

 membrane apparently free from the isthmus. Ventrals below the pectorals. Barbel present. 



