144 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Length, 380 mm. (Herre.) 



Sulu Archipelago. This nominal species, described without any 

 comparison with the other species in its genus, seems most closely 

 related to Aprionodon acutidens in its short snout, if indeed it is 

 really distinct. 



APRIONODON BREVIPINNA (Mullcr and Henle) 



Carcharias (Aprion) brevipinna Mjilleb and Henle, Syst. Beschr. Plagiostomeu, 

 p. 31, pi. 9, 1841 (type locality: Java ) .— Bleeker, Verb. Batav. Genootsch. 

 (Plagiost.), vol. 24, p. 25, 1852. 



Carcharias (Prionodoii) 'brevipinna Bleeker, Nat. Tijdsehr. Nederland. Indie, 

 vol. 4, p. 509, 1853 (Batavia, Java). 



Carcharias {Aprionodon) brevipinna 'DvutBXL, Hist. Nat. Elasmobr., vol. 1, p. 

 348, 1865 (compiled). 



Carcharias brevipinna Gxjntheb, Cat. fishes British Mus., vol. 8, p. 361, 1870 

 (Java). — BouLENGER, Proc. Zool. Soc. London, 1889, p. 243 (Muscat). — 

 PiETSCHMANN, Sitz. Ber. Akad. Wiss. Wien, math.-nat., Kl., vol. 117, pt. 1, 

 p. 678, fig. 4, 1908 (head below) (Japan). — Zugmayeb, Abb. Kon. Bayer. 

 Akad. Wiss., matb.-phys. Kl., vol. 26, p. 8, 1913 (Oman). 



fiqualus (Aprion) brevipinna Gray, List fish British Museum, p. 42, 1851 (ref- 

 erence). 



Aprionodon brevipinna Gasman, Mem. Mus. Comp. Zool., vol. 36, p. 117, 1913 

 (Java). — Jordan, Tanaka, and Snyder, Journ. College Sci. Tokyo, vol. 33, 

 p. 14, 1913 (Japan). — Izuka and Matsutjra, Cat. Zool. Spec. Tokyo Mus., 

 Vertebrata, p. 190, 1920 (Boshiu).— Fowleb, Proc. 4th (1929) Pacific Sci. 

 Congr., Java, p. 493, 1930 (reference). 



Depth 7ys to subcaudal origin; head 3%, width about 2 ? Snout 

 2% in head, narrowing forward; eye 9i/^, 3"% in snout, 6 in inter- 

 orbital; mouth length ly^ its width, which about 3% in head; pre- 

 oral length 2^/^ in head; upper teeth in 36 rows, lower in 33 rows, 

 entire, bases broad, narrow cusps erect; nostrils about last third in 

 preoral length, inner lobe broad and short, internarial half preoral 

 length; interorbital moderate. Gill openings equidistant, last above 

 pectoral. 



Scales very small with 3 to 5 keels, with as many points. 



First dorsal origin opposite inner pectoral angle, front fin edge 

 1% in head ; second dorsal inserted opposite first basal third of anal, 

 fin length 3 in head ; anal length 2i/^ ; least depth of caudal peduncle 

 5%; pectoral li/^, width 2I/5 in its length; ventral length 3% in 

 head ; caudal 24^ in rest of body, subcaudal 21^ in caudal. 



Gray -brown, below paler. (Miiller and Henle.) 



Arabia, East Indies, Japan. According to Garman the mouth 

 with labial folds in the angles only. 



Genus HYPOPRION Muller and Henle 



Hypoprion Mijlleb and Henle, Syst. Beschr. Plagiostomeu, p. 34, 1841. (Type, 

 Carcharias (Hypopr-ion) maHoti Miiller and Henle, designated by Jordan 

 and Gilbert, U. S. Nat. Mus. Bull. 16, p. 61, 1883.) 



