382 CARCHARIIDJE. 



n-0. Half-grown. Formofa. From Consul Swinhoe's Collection. 



p. Young. Araoy. From Consul Swinhoe's Collection. 



q, r. Half-grown and young. Japan. Purchased of Mr. Jamrach. 



.s. Stuffed, 51 inches long. South Australia. Purchased of Mr. 

 Knight. 



t. Half-grown : stuffed. Island of Totoya (Feejee Tslands). Col- 

 lected by F. M. Rayner, Esq. 



u, V, w, X. Young and foetus. 



y-z. Half-grown : stuffed. 



n. Jaw of a large example. From the Collection of the Zoological 

 Society. 



/3. Jaws of a half-grovpi example. 



3. Zygsena tudes. 



ZygSBna tudes, Cuv. BJkgne An. ; Valenc. Mem. Mtts. ix. p. 225, pi. 12. 



fig. 1. 

 Syhyrna tudes, Miill. i^ Henle, p. 53 ; Miill. ^ Trosch. in Schomburgk, 



Brit. Guian. iii- P- 642. 

 Cestracion tudes, Dumeril, Elasmobr. p. 384. 



Intermediate between Z. malleus and Z. tiburo. 



Anterior margin of the head much curved, but not continuous 

 with the lateral edge ; the length of the hind margin of oue side of 

 the hammer is less than its width near the eye. Nostril close to the 

 eye, prolonged into a groove running along the greater part of the 

 front margin of the head. 



Mediterranean ; tropical parts of the Atlantic ; Indian Ocean and 

 archipelago. 



a. Half-grown (32 inches) : stuffed. West Indies. Purchased of 



Mr. Scrivener. 



b. Young. Demerara. Presented by Sir R. Schomburgk. 



c. Young : stuffed. Zanzibar. From Lieut.-Col. Playfair's Col- 



lection. 



d. Young. Sumatra. Purchased of Hr. Frank. 



e-f. Young. From the Collection of Dr. van Lidth de Jeude. 



4. Zygaena tiburo. 



Tiburonis, species minor, Pison. Hist. Nat. Bras. p. 181 ; Wilhighby, 



p. 55, tab. B 9. no. 3. 

 Cestracion, no. 2, Klein, Miss. iii. p. 13, tab. 2. figs. 3 & 4. 

 Squalus tibiu-o, L. Syst. p. 399 ; Bl. Schn, p. 131 ; Gronov. Syst. ed. 



Gray, p. 6. 

 Heart-headed Shark, Shaw, Gen. Zool. v. 2. p. 355, pi. 154, and Nat. 



Misc. pi. 229. 

 Sphyrna tiburo, Miill. Sf Ilenk, p. 53. 

 Zygsena tiburo, Valenc. Mem. Mus. ix. p. 226, pi. 12. fig. 2, 

 ? Zygaena subarcuata, Storer, Proc. Bost. Soc. Nat. Hist. 1848, 



p. 70. 

 Cestracion tiburo, Dumiril, Elasmobr. p. 385. 



The anterior and lateral margins of the head are confluent, form- 



