000 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



at first, then rising above base of pectoral, tirst largest, equal to l\ in 

 the interorbital space, the others progressively smaller to last, which 

 is one-half the length of lirst. 



Body rough on the top of head and back. Fins large, first and 

 second dorsal each with a strong, sharp-pointed spine, the origin of 

 tirst midwaj' between tip of snout and origin of the second dorsal; first 

 dorsal higher than second, its margin concave and its height a little 

 less than head; second dorsal with its origin midwaj' between origin 

 of first dorsal and tip of caudal, low, and with its margin also concave; 

 anal smallest fin. posterior to second dorsal; pectorals very large, equal 

 to caudal, ])road and with margin straight; origin of ventral nearer 

 first dorsal than second dorsal, short, blunt behind, and margin straight; 

 caudal with lower lobe broad. Caudal peduncle long, compressed, 

 flattened above and below, its least depth equal to its l)readth a trifle 

 more than eye or about 2^ in interorbital space. 



Color in spirits pale brown, dark above; across snout a l)road pale 

 bar, then one behind eye, crosswise, above, two narrow pale bars 

 between eye and first dorsal, then two more from first dorsal, two 

 more between first and second dorsal, two from second dorsal, a broad 

 pale one on middle of caudal peduncle, and then another at junction of 

 caudal and caudal peduncle; pectorals and ventrals pale al)Ove. 



Length 19 1 inches (48 cm. 5 nmi.). 



Described from a specimen from Nagasaki. 



Coasts of Japan; generally common southward. Our specimens 

 taken at Misaki, Tokyo, Wakanoura, Ko])e, Hakata, and Nagasaki. 

 It is close to the Australian HetcTodontus 2)h;ilippi^ diflering at least 

 in the coloration. To the Chinese species ITeterod<n\tux zebi'a"^ it is 

 still nearer, but according to Steindachner it difi^ers in coloration, in 

 the form of th(> head, and of the individual fins. 



Family IV. SCYLIORHINID.E. 

 CAT SHARKS. 



Dorsal fins 2, both rather small, without spines, the first more or 

 less behind the ventrals; anal fin present, usually before the second 

 dorsal; caudal fin rather long, usuall}^ with a basal lobe; the tail not 

 keeled and not bent upward. Spiracles present, close behind eye; no 

 nictitating membrane; gdl openings small, the last one above the root 

 of the pectorals. Mouth usually broad, with small teeth, several seri(»s 

 being in fuiutioii; teeth small, each with a median cusp and 1 to 4 

 small cusps on each side; nostrils riear mouth, not confluent with it, 

 sometimes pi'ovided with cirri. Gill openings 5, nearly equidistant. 

 Mucons pores about iiead numerous, especially on lower sidt^of snout. 

 Oviparous. Egg cases hirge, quadrate, with prehensile tubes at the 

 angles. Small sharks, the species rather numerous in warm seas. 



(' C'eslraciomebra Gray, Zool Miscel., 1831, p. 5; Canton. 



