282 University of California Publications in Geology [Vol. 7 



CANCELLABLE STANTONI, n.sp. 

 Plate 12, figures 2a and 2b 



Shell, small, with five whorls, the first two, turbinate, smooth ; 

 the third whorl is cancellated by ten or twelve ribs. About 

 every fourth rib is enlarged. These heavy ribs are well rounded 

 on the fourth and fifth whorls and are more oblique than those 

 on the third. They extend from an indistinct, irregular suture 

 over the entire whorl. Strong revolving ribs with finer riblets 

 also decorate this beautiful little shell. Mouth, sub-oval ; outer 

 lip thickened, rounded, and crenixlated on interior. Columella 

 marked by three strong plaits, the posterior one being the 

 strongest. Canal short and very slightly notched. 



Three specimens were found at University of California Local- 

 ity 1853. Another specimen was found in the University of 

 California Collection from near Fort Tejon. 



Named for Dr. T. W. Stanton, Chief Palaeontologist, United 

 States Geological Survey. 



Dimensions: Length, 12mm; width of body-whorl, 6mm. 



CANCELLAEIA IBELANIANA Cooper 

 Plate 12, figure 8 



Cancellaria irelaniana. — Cooper, J. G., Catalogue of California Fossils, 

 Bull. 4, California State Mining Bureau, p. 42. 1894. 



''Shell oblong fusiform; spire of eight whorls, the first three nuclear, 

 smooth, conical; fourth with nine prominent vertical ribs abruptly trun- 

 cate at sutures, and continuing thus on next three whorls, but on eighth 

 whorl becoming conical tubercles at posterior margins, more distinct 

 on body-whorl, the ribs disappearing. The three anterior whorls show 

 strong vertical lines of growth, or irregular sculpture, which above the 

 tubercles is crossed by three or four revolving raised lines. (Outer lip 

 broken off for about half an inch.) Columella with four very strong 

 and three fainter oblique folds (or ribs). Length, about 1.75 inch; 

 breadth, 0.75; mouth, 0.87; width, (?). 



"Only one specimen found at Marysville Buttes by Mr. Watts. This 

 shell is nearer to the sub-genus Narona than to any of the allied forms, 

 and in its spire much resembles the species living on our coast, C. (N.) 

 cooperi Gabb. Though Mr. Gabb described a Tertiary species as C. 

 vetusta, thus suggesting its absence from the Cretaceous strata, we 

 have here a proof of its presence in the Eocene or Cret. B. strata. ' ' 



Arnold reports this form from the Eocene of the Coalinga 

 District, 



Dimensions : Length, 43mm ; width of body-whorl, 20 mm. 



