1. CARCHAEIAS. 363 



the end of the snout. Teeth of the upper and lower jaw similar iu 

 form, erect, constricted, on a broad two-rooted base ; the upper 

 rather broader than the lower, and with some obtuse denticulations 

 on the base, f|-. Gill-openings much wider than the orbit. Pec- 

 toral fins of moderate length and width, not extending to the end of 

 the dorsal fin, the length of their inner margin being one-third of 

 that of the outer. Dorsal fin nearer to the root of the pectoral than 

 to that of the ventrals. The second dorsal equal in size and form 

 and exactly opposite to the anal, one-third the size of the first 

 dorsal. Length of the caudal fin one-fourth of the total. Extremities 

 of all the fins with a black spot. 

 Zanzibar. 



a. Stuflfed, 22 inches long. From Lieut.-Col. Playfair'a Collection. 



. Prionodon *. 



Prionodon, Miill. ^ Henle. 

 Prionace, Cantor, 



Eulamia, Isogomphodon, Lamiopsis, Platypodon, Isoplagiodon et 

 Cynocephalus, Gill. 



Carcharias with some or all the teeth serrated, not only on the base, 

 but also on the edges'of the cus^. 



!Synopsis of the Species. 



A. The first dorsal is nearer to the ventrals than to the pectorals. 



Snout very long 14. glauctis, p. 364. 



Snout moderately produced 15. munsing, p. 365. 



B. The first dorsal is nearer to or commences above the pectorals. 



a. The upper teeth oblique, serrated, with a notch in the outer margin. 



u. The lower teeth serrated. 



aa. Origin of the first dorsal at a very short distance from the 

 root of the pectorals. 



aa. Snout produced, length of the lower margin of the pectoral 

 being 



* 1. Carcharias (Prionodon) zambezensis, Peters, Monatsber. Ale. Wiss. Berl. 

 1852, p. 276 ; and Flussfische Mossamb. p. 7, taf. 1. fig. 2. — East Africa. 



2. (Prionodon) falciformis, M. Sf H. p. 47 ; Guichenot, in Sagra, Cuba, 



Poiss. p. 193, pi. 6. fig. 3 ; Dtmiiril, Elasmobr. p. 374. — Cuba. 



3. ( ) henlei, Dumeril, Elasmobr. p. 372 (not M. ^ H.). — South 



America. 



4. ( ) remotus, Dumiril, I. c. p. 374. — West Indies. 



6. Squalus cseruleus, Mitch. Trans. Lit. ^ Phil. Soc. New York, i. p. 487 ; 

 Carcharias cseruleus, Dekay, New York Faun. Fish. p. 349, pi. 61, 

 fig. 200 ; Lamna caudata, Dekay, New York Faun. Fish. p. 354, pi. 62. 

 fig. 205 ; Carcharias (Prionodon) milberti, M. Sf H. p. 38, pi. 19. fig. 3 

 (teeth) ; Dumiril, Elasniiobr. p. 360 ; Eulamia milberti, Gill, Proc. Ac. 

 Nat. 8c. Philad. 1864, p. 262. — Atlantic and Mediterranean. 



6. obtusus, Poey, Mem. Cub. W. p. 337, tab. 19. figs. 7 & 8; Squalus 



platyodon, Poey, I. c. p. 336, tab. 19. figs. 5 & 6 ; Eulamia obtusa, 

 Poey, Reperi. Fis.-nat. Cub. 1868, p. 447, tab. 4. fig. 16.— Cuba. 



7. maou, Less. Voy. Coq. Zool. ii. p. 91, Poiss. pi. 1. — Pornotou archi- 

 pelago. 



