iro.1324. ELASMOBRANCHIATE FISHES— JORDAN AND FOWLER. 601 



a. ScYLioBHiNiN.E. Nasal and Duccal cavities separate; spiracles close behind eye; 

 gill openings nearly equidistant; teeth small, usually tricuspid. 

 h. Nostrils separated from each other l)y a broad isthmus, 

 c. Scales on upper margin of the tail little if at all enlarged, usually similar to 

 those on rest of l)ody, or at any rate not forming a serrated edge. 

 d. Head not very broad ; stomach not inflatable; second dorsal behind anal, 



which is far from caudal Ilalxluraa 4. 



dd. Head extremely broad; stomach capable of great inflation; second dorsal 

 over anal Cephaloscyllium, 5. 



4. HALvELURUS Gill. 



Halxlurux GihL, Ann. Lye. Nat. Hist. N. Y., ISHl, p. 407 {hurgeri). 



Body and head .slender; spirjiclo small, close behind eye; nasal and 

 buccal cavities separate; nasal valves simple, without lobe or groove, 

 the nostrils separated by a broad interspace; teeth small, tricuspid. 

 First dorsal behind ventrals, second dorsal behind anal, v^hich is far 

 from caudal. 



Very small spotted sharks, allied to Scyliorhinus and Catulus. 



{aXg, sea; aiXovpog, cat.) 



4. HAL^LURUS BURGERI (Mialler and Henle). 



SeylUum burgeri MtJLLER and Henle, Plagiost., 1837, p. 8, pi. ii; Nagasaki. — 



ScHLEGEL, Fauna Japonica, Poiss., 1850, p. 301; Nagasaki. ^Bleeker, Act. 



Soc. Sci. Ind. Neerl., I, 1856, Amboyna, p. 69; Amboyna. — GtJNTHEB, Cat. 



Fish Brit. Mus., VIII, 1870, p. 404; Japan, Formosa, Amboyna. — Dumeril, 



Hist. Nat. Piss., I, 1870, p. 320; Nagasaki. 

 Halsclurus burgeri Gill, Am. Lye. Nat. Hist. N. Y., 1861, p. 407. 



Head Tf; depth about 13^ in length; width of head 1^ in its length; 

 snout 2^ in head; interorbital space 2i; width of mouth about 2; eye 4; 

 eye If in snout; If in interorbital space; pectoral li in head; base of 

 anal 2. 



Body very elongate, depressed somewhat in front, and tail long and 

 tapering. Head small, rather broad, but not as broad as long, and 

 depressed above; snout depressed, produced, lateral profile pointed, 

 but when seen from above, broadly rounded; eyes rather large, lateral, 

 about in center of length of head; mouth very broad, mandible begin- 

 ning in front of eye, and corners ])elow posterior part of eye; teeth 

 small, numerous, tricuspid in both jaws; nostrils rather large, nearer 

 eye than tip of snout, but not confluent with mouth; interorbital space 

 broad and flattened like top of head and snout. Spiracles large and 

 directly behind the eye at a yevy short distance. Gill-openings small, 

 lateral, and above base of pectorals. 



Body very finely roughened. 



First dorsal much larger than second, its origin much nearer base 

 of lower caudal lobe in front than tip of snout, and behind ventrals; 

 second dorsal entirel}^ behind anal and distant from first dorsal 3 times 



