1921] NATURAL SCIENCES OF PHILADELPHIA. 331 



The nodes become weaker on the penult whorl and almost disappear 

 on the last. The last two whorls have the periphery unusually 

 rounded for a Conus. There are about 9 coarse spiral cords near 

 the anterior end. 



Length 63, diam. 35.5 mm. Probably a])out 12 whorls. 



Type no. 2571 A. N. S. P. A single example. 



This shell has a rather abnormal appearance, but the sculpture 

 of the spire is unlike other known cones of the same beds. 



Conus yaquensis Gabb. Plate XXI, fig. 6. 



Conus yaquensis Gabb, Tr. Amer. Philos. Soc. xv, 1873, p. 233,. 



This cone resembles C. proteiis closely in shape except that the 

 the spire is lower, with much less concave outlines, the apical angle 

 much wider. The spiral furrow below the suture is deeper. In 

 color it is a "negative" of C. proteus, the spots being white, the in- 

 tervals ferrugineous. This color affects the texture of the shell, 

 the white spots resisting erosion. In one worn specimen there are 

 spiral series of pits along the colored bands. The anterior third 

 of the last whorl has a few narrow raised spirals. 



Length 49, diam. 30 mm. Type. 



Length 40, diam. 23 mm. Paratype. 



The two specimens are no. 2547 A. N. S. P. 



Conus mus Hwass. 



Conus mus Hwass, Gabb, Tr. Amer. Philos. Soc. xv, 1873, p. 230. 



Two specimens are catalogued under no. 2562 A. N. S. P. 



Conus bonaczyi Ciabb. Plate XIX. flg. 3. 



Conus bonaczyi Gabb, Tr. Amer. Philos. Soc. xv, 1873, p. 233. 



This small species has the whorls of the spire flattened, very 

 slightly concave, and marked with arcuate radial striae only. 

 Shoulder rounded; lateral outline convex except near the base, 

 where it is contracted. There are 18 spiral riblets, much wider than 

 the intervening grooves in the upper part, about equal to them in 

 the lower. The riblets are slightly concave on top. The grooves 

 have fine, close, sharp axial striae. 



Length 21.5, diam. 12 mm. 



Type no. 2551 A. N. S. P. 



A specimen 15.3 mm. long has 20 spiral riblets. which are narrower 

 than in the type. 



Conus proteus Hwass. 



The specimens agree well with recent shells in form and markings. 



