1921] NATURAL SCIENCES OF PHILADELPHIA. 327 



Conus haytensis politispira n. subsp. Plate XIX, flg. 5. 



Spiral striae on the spire are very faint or wanting, the surface 

 being somewhat poHshed. It does not attain so large a size as the 

 typical form. 



Length 66, diam. 35 mm. 



Type no. 2565 A. N. S. P. 



Conus domingensis Sowerby. Plate XIX, fig. 7. 



Conus domingensis Sowb., Q. J. Geol. Soc. vi, 1849, p. 45. 



This was included by Gabb in C. haytensis, but it maybe distin- 

 guished by the pyriform contour, distinctly contracted near the 

 anterior end, and the usually more acute spire. Four or five of the 

 upper whorls are conspicuously nodose. The spirals of the anterior 

 half are more or less granulous. On comparing a good series of dif- 

 ferent ages with C. synimetricus we consider them quite distinct spe- 

 cies. 



Length 89.5, diam. 49 mm. 



While abundant, it was not taken in such copious quantity as C. 

 haytensis. 



Conus recognitus Guppy. Plate XIX, flg. 2. 



CoiDis solidus Sowerby, Quart. .Jovirn. Geol. Soc. xv, 1849, p. 45. Guppy, Q. J. 



Geol. Soc. xxii, 1866, pi. 16, fig. 1. Not C. solidus Sowb., Thes. Conch. 



1841, p. 580. 

 Conus pyriformis Reeve, Gabb, Tr. Amer. Philos. Soc. xv. 1872, p. 229. Not 



of Reeve, Conch. Icon. fig. 70. 

 Conus recognitus Guppy, Proc. Sci. Asso. Trinidad, 1867, p. 171; Geol. Mag. 



1874, p. 409; Q. J. Geol. Soc. 1876, p. 527. 



This species is undoubtedly close to the recent C. pyriformis Reeve 

 from the west coast of Central America, which is probably a des- 

 cendant. C. recognitusis quite readily distinguished by the small 

 nodes on the spiral whorls being obsolete, or present only on three 

 or four of the upper whorls, while in C. pyriformis they are promi- 

 nent on at least seven. It is also less pyriform. 



Length 70, diam. 41 mm. 



Conus imitator Brown and Pilsbry. 



Conus imitator B. and P., Proc. A. N. S. Phila. 1911, p. 342, pi. 23, fig. 2, 3. 



The largest specimen of a series collected by Gabb is 67 mm. long. 

 The shoulder of the last whorl is acutely angular in the adult stage, 

 and the spire is lower than in C. catenatus. It is related to C. 

 planiliratus, but is larger and smoother, and not contracted near 

 the anterior end. 



Conus stenostoma Sowerby. Plate XXI, fig. 1. 



Conus stenostoma Sowb., Quart. Journ. Geol. Soc. Soc. xv, 1849, p. 44. 

 Conus stenostoma Sowb., Guppy, Quart. Journ. Geol. Soc. xxii, pi. 16, fig. 2. 



