516 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Mackerel ; (Scomber vernalis.) 



Specimens taken July 18, twenty miles south of No Mans Land, con- 

 tained shrimps, Thysanopoda, sp. ; larval crabs in the zoea and megalops 

 stages of development ; young of hermit-crabs ; young of lady-crabs, 

 Platyoniclius ocellatus ; young of two undetermined Macroura; numer- 

 ous small Copepod Crustacea ; numerous shells of a Pteropod, Spinalis 

 Gouldii. 



Small Tunny; (Orcynus thunnina.) 



One specimen caught at Wood's Hole, in August, contained eleven 

 squids, Loligo Pealii. 



Bonito; (Sarda pelamys.) 



Specimens taken at Wood's Hole, in August, contained an abundance 

 of shrimp, Crangon vulgaris. . 



Blue-Fish ; Horse-Mackerel ; (Pomatomus saltatrix.) 



Specimens caught at Wood's Hole, in August, frequently contained 

 squids, Loligo Pealii ; also various fishes. 



Off Fire Island, Long Island, August, 1870, Mr. S. I. Smith saw blue- 

 fishes feeding eagerly on the free-swimming males (heteronereis) of Nereis 

 limbata, (p. 318,) which was then A T ery abundant. 



Sea-Bobin ; (Prionotus Carolinus.) 



A specimen caught at Wood's Hole, May 27, contained shrimp, Cran- 

 gon vulgaris ; and a small flounder. 



Another caught May 29 contained Amphipod Crustacea, Anonyjc (?), 

 sp. ; and Crangon vulgaris. 



Specimens dredged in Vineyard Sound, in August, contained mud- 

 crabs, Panopeus Sayi ; rock-crabs, Cancer irroratus; and several small 

 fishes. 



Toad-Fish; (Batraclius tau.) 



Several specimens examined at Great Egg Harbor, New Jersey, April, 

 1871, contained young edible crabs, Callinectes Jiastatus of various sizes 

 up to those with the carapax two inches broad ; shrimp, Crangon vul. 

 garis ; prawn, Palcemonetes vulgaris ; llyanassa obsoleia ; various fishes, 

 especially the pipe-fish, Syngnathus PecTcianus ; and the anchovy, Engrau- 

 lis vittatus. 



A specimen caught at Wood's Hole, in July, contained the common 

 rock-crab, Cancer irroratus. 



Goose-Fish ; Angler ; (Lopldus Americamis.) 



A specimen caught in Vineyard Sound, in June, contained crabs, 

 Cancer irroratus ; and squids, Loligo Pealii. 



Cod; (Gadus morrhua, var.) 



The cod-fishes devour a great variety of Crustacea, Annelids, Mol- 

 lusks, star-fishes, &c. They swallow large bivalve shells, and after 

 digesting the contents spit out the shells, which are often almost uniu- 



