50 " THETIS " SCIENTIFIC RESULTS. 



Teeth. — The anterior lamellfe in the upper jaw have a sinuous 

 margin and each is formed of six to eight enamel rods, the 

 columnar structure being plainly visible. The palatine pair 

 have their outer edges roughly denticular and their flat surfaces 

 each raised into three tubercles, one before and two behind ; the 

 tubercles are white and enamel-like ; the rest horn-colour. The 

 lamellifi in the lower jaw have the margin incised by three deep 

 clefts, one median and two lateral, leaving four rounded pro- 

 minences, of which the submedian pair are smaller and more 

 acute. The cokxmnar structure is not so evident as in the upper 

 series, and is traceable only in the above named cusps. A long, 

 low white enamel elevation runs backward from behind each of 

 the outer or posterior cusps. 



Colour. — Silvery above and on the sides, yellowish below. 

 Membrane of the fins bluish-black ; the bases of the pectorals 

 and ventrals horn-colour ; tip of the snout black ; eye yellow ; 

 lateral line raised, brown ; caudal filament yellow. The markings 

 take the form of narrow bands passing obliquely from behind 

 forwards and downwards ; the}'' are confined to the head and 

 the anterior part of the body, and are formed of brown splashes 

 which below become rings ; they extend across the chin and the 

 base of the pectoral fins. Above the lateral line the whole body 

 is marked with narrow transverse broken lines, about 25 in 

 number ; those on the tail oblique. 



Length to end of dorsal fin 670 mm., to end of caudal filament 

 860 mm. (the filament is, however, incomplete.) 



This new species differs, first, fr-om C. monstrosa, Linn., by 

 having shorter pectorals, no distinct anal fin, the snout more 

 produced, the hinder margin of the second dorsal rounded, and 

 the tail fins less developed ; second, from C. affinis, Capello, by 

 its sub-continuous dorsal fins and longer pectorals, b}'' having the 

 tail produced into a long filament and the fins much lower ; also 

 by the truncated character of the ventral fins and probably in 

 the form of the dorsal spine. It also differs in hue, being of a 

 beautiful silvery colour, adorned with splashes and circles ; C. 

 affinis being described as uniformly plumbeous. It is further to 

 be remai'ked that whereas C. ogilhyi occurs in shallow water, C. 

 affinis is the only Elasmobranch known from depths exceeding 

 1000 fathoms. 



The chief interest of this record is not that of a new species, 

 but rather the extension of the geographical range of a genus in 

 itself of great interest. 



The earliest desci'ibed species, C. tnonstrosa, is known from the 

 coasts of Europe, West and South Africa, the Azores, and Cuba, 

 and also from Japan. It is taken only in deep water. C. affinis, 

 first described from Portuguese specimens, was afterwards taken 



