168 University of California Publications. [Zoologt 



Family ALOPIID.^. 



12. Alopias vulpes (Gmelin). 



THE THRESHER SHARK. 



(Jordan and Evennann, 1896, I, p. 45, fig. 20.) 

 Not uncommon on the Southern California coast. It is found, 

 in all warm seas. 



Family SQUALID.E. 



13. Squalus sucklii (Girard). 



THE DOG FISH. 



(Jordan and Evermann, 1896, I, p. 54.) 



Reported by the fishermen to be rather abundant in deep 

 water a few miles from the mouth of San Diego Bay. Unlike 

 specimens from the north, it is unknown from the bays or shallow 

 water. Two specimens secured. It is found northward to Ber- 

 ring Island (Jordan and Gilbert, 1899, p. 434), and is very abun- 

 dant north of San Francisco. 



Family SQI^ATINID.E. 

 14. Squatina squatina (Limupus). 



THE ANGEL SHARK. 



(Jordan and Evermami. 1896, p. 58.) 



Not uncommon ; specimens frequently seen moving slowly- 

 over the bottom ai)parently in search of food. It is widely dis- 

 tributed over all warm seas, and is found northward to San 

 Francisco on our coast. 



Family RHIXOBATID.E. 

 15. Rhinobatus productus Ayres. 



GUITAR FISH. 



(Jordan and Evermann. 1896, I, p. 63.) 



This species is very abundant in rather shallow water. Large 

 numbers were taken in San Diego Bay. The following descrip- 

 tion was drawn from a male specimen 35 inches in length : 



