Vol. 3] Starks-Morris. — Marine FisJtes. 167 



latter somewhat smaller. Fourth gill opening above anterior part 

 of pectoral. No black on fins. 



This specimen had 28 eggs, 14 in each oviduct, each about 4 

 inches long and covered with a thin brownish membrane. 



This shark is found in abundance northward to San Francisco 

 (Jordan and Gilbert, 1880, p. 458). It reaches a length of 6 feet, 

 and is of some value for the oil which its liver yields, but more 

 particularly for its fins, from which the Chinese make a finely 

 flavored soup, the cartilaginous fin-rays dissolving into a nutri- 

 tious gelatine. Most of the fins on the market are used by Chinese 

 in the United States, but some of them are shipped to China. 



9. Prionace glauca (Linnjrus). 



BLUE SHARK. 



(Jordan and Evermann, 1896, I, p. 33, fig. 16.) 

 Recorded from San Diego by Eigenmann (1892, p. 133). Not 

 seen by us. The blue shark is occasionally taken on our coast. It 

 is abundant in tropical seas, and not uncommon in British waters. 

 It reaches a length of 15 to 20 feet, and shares with most large 

 sharks the reputation of being a man-eater. 



10. Card arias lamiella Jordan and Gilbert. 



BAY SHARK. 



(Jordan and Evermann, 1896, I, p. 37.) 

 San Diego Bay is the type locality of this shark, where it is a 

 rare species. It is the only species of Carcharias occurring on our 

 coast. Dr. Jordan has a photograph of this shark from Avalon, 

 Santa Catalina Island. 



Family SPHYRINID^. 

 11. Sphyrna zygaena Linnaeus. 



THE HAMMER-HEADED SHARK. 



(Jordan and Evermann, 1896, I, p. 45.) 

 Occasionally taken south of Point Conception. A mounted 

 specimen seen that was taken off Point Loma. It is of cosmopol- 

 itan distribution, being fomid in all warm seas. It reaches a 

 length of 15 feet. 



