358 CAECHABIID^. 



Synopsis of the Sj^ecies. 



a. Length of the anal nearly equal to its distance from the ventrals. 



1. luticaudus. 

 h. Length of the anal much less than its distance from the ventrals. 

 ». Labial groove none on the upper jaw. 



aa. Length of the snout nearly equal to the distance of the eye 



from the gill-opening 2. acutus. 



bb. Length of the snout nearly equal to the distance of the eye 



from the pectoral 3. dumerilii. 



/3. A short labial groove on the upper jaw. Distance between the 

 outer angles of the nostrils : — 

 aa. equal to that o^ the nostril from the extremity of the snout. 



4. walbeehmii. 

 bb. much more than that of the nostril from the extremity of 

 the snout 5. ter7ce twice. 



1. Carcliarias laticaudus. 



Carcharias (Scoliodon) laticaudus, MiiU. 8f Henle, p. 28, pi. 8 ; Du- 



mh-il, Elasmobr. p. 343. 

 ( ) macroni\"nchus, Bleek. Verh. Bat. Gen. xxiv. Plagiost. 



p. 31, pi. 1. tig. 1 ; Dum^ril, I. c. 



Pectoral fin with the posterior margin nearly straight, the upper 

 angle being nearly a right one ; it terminates at some distance from 

 the origin of the dorsal fin. The length of the base of the anal fin 

 is equal to or but little less than its distance from the ventral ; its 

 pointed terminal lobe terminates at a distance from the root of the 

 caudal fin. Terminal caudal lobe obliquely truncated. A very 

 short labial groove at the angle of the mouth, not extending on the 

 upper jaw, and for a very short distance only on the lower. Length 

 of the snout (from the front margin of the mouth) equal to, or a 

 little more than, the distance of the eye from the gill-opening. 

 Pectoral fins black. 



East Indies ; China and Japan. 



a-h. Young. Bengal. Presented by General Hardwicke. 



c. Adult (18 inches). East-Indian archipelago. From Dr. Bleeker's 



Collection. — Type of C. macrorhynclivs. 



d, e-f. Half-grown and young. China. 



g, h. Several half-grown examples. Amoy. From Consul Swinhoe'a 



Collection. 

 i. Adult. Japan. Purchased of Mr. Jamrach. 

 Ic, 1. Adult and young. 



2. Carcliarias acutus. 



Carcharias acutus, Fiipp. X. JF. Fische, p. 65, pi. 18. fig. 4. 



Squalus russellii, Gray, III. Intl. Zoul. 



Carcharias (Scoliodon) acutus, Miill. ^- Henle, p. 29; Cant. Mai. 



Fish. p. 399; Blet-k. Verh. Bat. Gen. xxiv. P%. p. 30; Dumiril, 



Ehtfimuhr. p. PAb, 



Pectoral fin with the posterior margin slightly concave and the 

 upper angle pointed, extending to, or somewhat beyond, the origin 



