1921 J 



NATURAL SCIENCES OF PHILADELPHIA. 



417 



Phacoides (Parvilucina) pupulus Pils. and Johns. Text-flg. 42; Plate XXXVIII fig. 2. 



Phdcoides {Parnliinmt) pupulus P. & J., Proc. A. N. S. Phila. 1917, p. 198. 

 Lucina crenuldtti Con., Gabb, Trans. Araer. Philos. Soc, xv, p. 251. 

 Phacoides (Lucinisca) muricatus (Spengler) 



Lucina tigerina Linn., Gabb, Trans. Amer. Philos. Soc, x\, p. 251. 

 Phacoides {Lucinisca) murical us Spengler, Dall, Trans. Wagn. Inst., iii, p. 1373. 



Six specimens, no. 3162, appear to us identical with this recent 



species. 



Phacoides (Parvilucina) yaquensis (Gabb) 



Lucina yaquensis Gabb, Trans. Amer. Philos. Soc, xv, 1873, p. 251. 

 Phacoides {Parvilucina) yaq^iensisGahhj'DaW, Trans. Wagn. Inst., iii, p. 1382. 



The sculpture is of delicate, raised, concentric lines and almost 



obsolete radials. Length 3.8, alt. 3.5 diam. of a right valve 



1.2 mm. Type no. 2772 A. N. S. P. There are many other valves 



in the lot. 



Fig. 41. Phacoides perplexus F. and J. Fig. 42. Phacoides pupulus P. and J. 



Lucina janus Dall. 



Lucina janus Dall, Trans. Wagn. Inst., iii, p. 1353, pi. 51, fig. 9. 

 A number of specimens show variation in degree of inflation, 

 but none are so nearly spherical as L. corpulenta Dall. I have had 

 the advantage of a comparison with the Chipolan type by Doctor 

 Dall. 



Lucina mauryae Pils. and Johns. Plate XLVl, flg. 3. 



Proc. A. N. S. Phila. 1917, p. 198. 



The dimensions of the type should be, length 36.3, alt 33 5. diam. 

 18.5 mm. It becomes a little larger. 



Lucina buUa (Gabb) Plate XLVI, flg. 6. 



Cardium {Serripes) bulla Gabb. Trans. Amer. Philos. Soc, xv, 1873, p. 251. 

 The somewhat prosogyrate beaks are a little in front of the middle. 

 There is an extremely narrow and small lunule. The surface is 

 somewhat roughened by growth-lines; on the posterior and anterior 



