SCYLLID^. PETROMYZONTID^:. 647 



Subclass CHONDROPTERYGIL 

 Family SCYLLIID^l. 



Geuus SCYLLIUM. 



82. Scyllium canicula (Linn.). Small Spotted Dogfish. 

 Hab. British Seas. 



a. Purchased, Sept. 25, 1863. 



b. Purchased, July 18, 1872. 

 o-f. Purchased, July 28, 1873. 



83. Scyllium stellare (Linn.). Large Spotted Dogfish. 

 Hab. British Seas. 



a, b. Purchased, July 28, 1873. 



Family SPINACID.E. 



Genus ACANTHIAS. 



84. Acanthias vulgaris, Risso. Picked Dogfish. 

 Hab. British Seas. 



a-c. Purchased, July 18, 1872. 



d-i. Received in exchange, Jan. 7, 1873. 



Subclass LEPTOSTOMATA. 



Family PETROMYZONTID^E. 



Genus PETROMYZON. 



85. Petromyzon marinus, Linn. Sea-Lamprey. 

 Hab. British Seas. 

 a. Purchased, April 12, 1872. 



