.1324. ELASMOBRANCHIATE FISHES— JORDAN AND FOWLER. 633 



ich side of mouth; teeth of lower jaw oblique, with the points directed 

 lore or less outward of backward; upper teeth erect, triangular or 

 imceolate, with a single cusp. No nictitating membrane; spiracles 

 ride behind the eye; gill-openings narrow; scales not leaf-shaped, nor 

 edimaculatc, each with a strong median keel and two or more lateral 

 leels, each of these ending in a spine. In CentropKorxia, the nearest 

 ialated genus, there is no midrib to the scales, which are nearly 

 3100 th. In Cejitroseymnus the scales are smooth with a depression 

 t the base. Small sharks, living in deep water. 

 i {zame, shark, in Japanese.) 



28. ZAMEUS SQUAMULOSUS (Giinther). 



Centrophurus sqiuuiiulosus (iuNTiiKK, Deep Sea Fis^li, Challenger, 1887, p. .5, ]>]. n, 

 fig. B; Enoshima. 



Snout much i)roduced, mouth nearly midway between lirst gill- 

 pening and end of snout; laliial fold extends a little wa}' along mar- 

 ins of mouth; upper lip fringed; distance between nostrils two-fifths 

 'f length of preoral portion of snout. Scales tricuspid, with a median 

 eel, and so mimite as to give a velvety appearance to skin. First 

 orsal small, its l)ase (without spine) shorter than that of second, nearly 

 ne-sixth of distance between two tins; spines yery small, scarcely 

 »rojecting beyond skin; pectoral short, with lower angle rounded, not 

 ifoduced; extremity of ventral tins below end of second dorsal. Uni- 

 orm deep l)lack. Length, 27 inches. Oti' Inosinia, Japan, Station 

 32 ((Challenger) in 345 fathoms. (Giinther.) 



Coasts of Japan, in rather deep water. Known only from Sagami 

 ky, about Enoshima (misspelled Inosima by Giinther) and Misaki, 

 v'here our specimen was taken. 



{/i(/Ka?nulosus, with small scales.) 



27. ETMOPTERUS Rafine^que. 



Etmopterns Rafinesque, Caratteri di Alcnui Generi, 1810, p. 14 {aculeatua) . 

 Spinux CvviER, Regne Animal, Isted., 1817, p. 129 {acmithias and spinax) . 

 Spiiiax MiJLLEii and Henle, Plagiostomen, 1838, p. 86 (spinax). 

 Acanthidium Lowe, Proc. Zool. Soc. London, 1839, p. 91 (pusillum). 



Mouth little arched. Teeth of lower jaw with the point so much 

 urned aside that the inner margin of the tooth forms the cutting edge; 

 ipper teeth erect, each with a long, pointed cusp and 1 or 2 smaller 

 ines on each side; spiracles wide. 



Small sharks of the warm seas, living in deep water, and nearly black 

 n color. 



{erpicxyev^ an aorist from Tt/xroj, to cut; Trrepoy, tin, the original 

 ype having frayed tins.) 



Proc. N. M. vol. xxvi— 02 43 



