91 



'3. Mustelus canis (Mitch.). Smooth Dogfish. 

 Common. June to October. 



4. Carcharhinus obscurus (Le Sueur). Dusky Shark.*, 

 Common. Midsummer to September. 



5. Sphyma zygaena (Linn.). Hammerhead Shark. 

 Uncommon. July to September. 



6. Alopias vulpes (Gmelin). Thresher Shark. 

 Occasional. April to June. 



7. Carcharias littoralis (Mitch.). Sand Shark. 

 Common. June to October. 



8. Isurus dekajd (Gill). Mackerel Shark. 

 Accidental. October. 



9. Cetorhinus maximus (Gunner). Basking Shark. 

 Accidental. 



10. Squalus acanthias Linn. Spined Dogfish. 

 Not uncommon. October to April. 



11. Squatina squatina (Linn.). Monkfish. 

 Uncommon. Summer. 



12. Raja erinacea Mitch. Common Skate. 

 Common. Resident. 



13. Raja ocellata Mitch. Big Skate. 

 Tolerably common. September and October. 



14. Raja eglanteria Bosc. Clear-nosed Skate. 

 Not uncommon. September. 



15. Raja laevis (Mitch.). Barn-door Skate. 

 Abundant. October to June. 



* Since this list was first prepared, two additional species of sharks have 

 been recorded, as follows: 



Prionace glauca (Linn.). Great Blue Shark. One record. A large speci- 

 men taken near City Island, N. Y., in late October, 1911, was presented to 

 the .\merican Museum of Natural History by Mr. Alfred Frank, of New 

 York. 



Corc/iar/imws Zm6a^es (Mtil. & Hen.). Edged Shark. One record. Mr. 

 Edwin Thorne, of Babylon, L. I., has the jaws of a large specimen which he 

 took in Great South Bay in midsummer several years ago. 



