414 



PROCEEDINGS OF THE ACADEMY OF 



[Part II 



MYTILIDAE. 



Modiolaria sp. undet. 



Modiola sp. Gabb, Trans. Amer. Philos. Soc, xv, 1873, p. 252. 

 Two very small valves (length about 3.25 mm), belong apparently 

 to the typical section of Modiolaria. 



Modiolus sp. undet. 



An internal cast, found with the following species. 



Lithophaga antillarum Orbigny. 



Lithodomus corrugaius Phil., Gabb, Trans. Amer. Philos. Soc, xv, 1873, p. 253. 

 These mussels were preserved in their burrows. They appear 

 typical of the species. 



'JJJS)- 



Fig. 37. Crenella diuturna. Fig. 38. Crenella rota. 



Crenella diuturna Pils. and Johns. Text-fig. 37; Plate XXXVIIl, fig. 7. 



Proc. A. N. S. Phila. 1917, p. 195. 



Crenella rota Pils. and Johns. Text-flg. 38. 



Proc. A. N. S. Phila. 1917, p. 195. 



PANDORIDAE. 



Pandora inconspicua Gabb. Plate XXXVIIl, figs. 8, 9. 



Pandora inconspicua Gabb, Trans. Amer. Philos. Soc. xv, 1873, p. 248. 



Convex (fig. 8) and flat (fig. 9) valves are photographed. The 

 former is selected as type; length 7, alt. 3.3 mm. 



Type and paratypes are no. 2676 A. N. S. P. 



CUSPIDARIIDAE. 

 Cuspidaria ornatior Pils. and Johns. Plate XXXVIIl, figs. 11, 12. 



Proc. A. N. S. Phila. 1917, p. 195. 



