120 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Gebia affinis Say. Smith, In v. V. S., p. 549, 1874. 



This species was not collected at Provincetowu, but was obtained from 

 the flats at Wellfleet by Prof. H. E. Webster, in 1879, and seems to 

 be abundant there. This is the first time it has been recorded from the 

 north side of Cape Cod. 



Crangon vulgaris Fabr. Smith, In v. V. S., p. 550, 1874; Trans. Conn. Acad., vol. 



V, p. 55, 1879. 



Very common along the shore. 



Palaemonetes vulgaris (Say) Stimp. Smith, Inv. V. S., p. 550, 1874; Trans. Conn. 

 Acad., vol. V, p. 88, 1879. 



Only a very few specimens of this species were collected, although 

 it was diligently sought for. These were found in the eel-grass in front 

 of the town and off the dike. 



SCHIZOPODA. 



My sis stenolepis Smith, Inv. V. S., p. 551, 1874; Trans. Conn. Acad., vol. v, p. 103, 



1879. 



A few specimens only were collected ; they were from the eel-grass in 

 front of the town. 



AMPHIPODA. 



Orchestia agilis Smith, Inv. V. S., p. 5.55, 1874, 



Very abundant on the beaches, under dead sea-weeds, etc. 



Talorchestia longicornis (Say) Smith, Inv. V. S., p. 556, 1874. 



Very abundant on both the outer and inner beaches, burrowing 

 deeply into the sand, about high-tide level. 



Talorchestia megalopthalma (Bate) Smith, Inv. V. S., p. 556, 1874. 

 Associated with the preceding. 



Hyale littoralis (Stimp.) Smith, Inv. V. S., p. 556, 1874. 



Collected in 1879; and also in 1872, by Smith and Harger. 



Calliopius laeviusculus (Kroy.) Boeck. Smith, Inv. V. S., p. 557, 1874. 



Found upon the beach at Long Point among stranded sea-weeds. 



Gammarus locusta (Linn6) Fahr., Systema Entomologia, 1775. Gould, Inv. Mass., 

 ed. I, p. 334, 1841. Smith, Bull. U. S. Nat. Mus., No. 15, p. 139, 1879.-- G. or- 

 natus Edwards, Ann. des Sci. Nat., tome xx, p. 367, 1830; Hist. Nat. des 

 Crust., tome iii, p. 47, 1840. Smith, Inv. V. S., p. 557, 1874. 



Only a few specimens of small size were obtained from the eel-grass 

 in various places. The scarcity of this species at Provincetowu is prob- 

 ably due to the absence of rocks and of much rock- weed, which together 

 form its favorite grounds. A comparison of European with American 

 specimens has enabled Professor Smith to establish the identity of G. 

 ornatus and G. locusta. 



