278 A - s - PACKARD, Jr., ON THE RECENT 



Branchiopoda. 



Hypothyris psittacea King. 



Frequent on hard and sandy bottoms along the whole coast in from eight to fifty 

 fathoms. 



Lamellibranchiata. 



Anomia ephippium Linn. 



Abundant, though small, at Caribou Island, eight fathoms, on Nullipores. Square Island, 

 thirty fathoms. , 



Anomia aculeata Gmelin. 



Dredged at depths varying from ten to fifty fathoms, Straits of Belle Isle. 



Astarte Banksii Leach. 



Astarte Laurentiana Lyell, Travels in North America. Astarte Warhami Hancock, Ann. Nat. Hist. 1846. Astarte compressa Daw- 

 son, Can. Nat. passim. 



There are the same variations noticeable in the fossil specimens from Portland, — which 

 I have received in large numbers from Messrs. E. S. Morse and C. B. Fuller, — as in the re- 

 cent specimens dredged on the coast of Labrador. Some old specimens resemble the vari- 

 ety A. Riehardsoni and A. fabuto of Reeve ; others the A. Warhami of Hancock ; while still 

 older individuals are much eroded at the beaks, as in the recent ones, and much thickened 

 at the hinge. Younger, thinner shells represent A. Laurentiana of the St. Lawrence Leda 

 Clays, and agree very closely with specimens thus labelled and kindly sent me by Dr. J. 

 W. Dawson. Recent specimens, given me by Dr. Stimpson from off Halifax, agree very 

 closely with A. Laurentiana. 



Astarte compressa (Linn.) 

 Astarte semisulcaia Leach. A. elliptica Brown, Gould. 



Abundant on the whole coast in from ten to fifty fathoms. It is more abundant in the 

 bays than A. Banksii, which is a deep-sea shell, and is found on the more exposed deep-sea 

 bottoms. 



Astarte striata Leach. 

 This species was taken at Hopedale in ten fathoms. It is not common. 



Cardium islandicum Chemn. 

 Of large size. In thirty fathoms at Square Island ; at Salmon Bay in ten fathoms, mud. 



Cardium Hayesii Stimps. Proc. Acad. Nat. Sc. Phil., p. 58, 1862, [PI. VII., fig. 14.] 



This species is found on the whole coast, and is more abundant than the preceding spe- 

 cies. Square Island, fifteen to thirty fathoms. Hopedale, ten fathoms. The figure is from 



