1921] 



NATURAL SCIENCES OF PHILADELPHIA. 



425 



Semele deli mata Pils. and Johns. Plate XLVI, flg. 9. 

 Pioc. A. N. S. Phila. 1917, p. 200. 



Semele firma Pils. and John.*^. Plate XLVI, flg. 10. 



Proc. A. N. S. Phila. 1917, p. 200. 

 Tellina (Merisca) eirati Pil.':. and Johns. Plate XLI, flg. 7. 

 Proc. A. N. S. Phila. 1917, p. 201. 



Tellina (Moerella) simpsonj Dall. 



T. {M.) siinpsoni Dall, Trans. Wagn. Inst, iii, p. 1024, pi. 46, fig. 12; 

 According to Dall, "this form is what Gabb identified as T. 

 cuneata d'Orb." but in the vial labelled T. cuneata (no. 2663) we 

 find only a worn valve of some Erycinid form. 



Fig. 46. Tellina minuta Gabb ; inside and exterior of the type valve. 



Tellina (Cyclotellina) fausta Donovan. 



T. {Arcopagia ) fausta Don., Gabb, Trans. Amer. Philos. Soc, xv, p. 249. 

 The outside of a single almost perfect specimen (no. 2695) does 

 not differ materially from this recent species. As the valves are 

 closed, no details of the interior are accessible. 



Metis efferta Pils. and Johns. 



Proc. A. N. S. Phila. 1917, p. 201. 



Metis chipolana Dall (?). Plate XLVI, flg. 7. 



Metis chipolana Dall, Trans. Wagn. Inst., iii, 1900, p. 1042, pi. 47, fig. 21. 

 Tellina (Macoma) constrida Brug., Gabb, Trans. Amer. Philos. Soc, xv, p. 

 249. 



A single Santo Domingan example (no. 2671) differs from the 

 type by having the posterior end broader, the radial striation is less 

 distinct, and the concavity of the right valve more extensive; yet 

 we do not think it specifically separable. Length 37.3, alt. 32, diam. 

 15 mm. 



