276 University of California Publications in Geology [Vol. 7 



University of California Locality 1853. Named in honor of 

 Mr. F. M. Anderson, Curator, Department of Palaeontology, 

 California Academy of Sciences. 



Dimensions : Length, 10.5mm ; width of body whorl, 4.5mm. 



TUEEIS SUTUEALIS (Cooper) 

 Plate 11, figures 6«, 6b 



Mangilia suturalis Cooper. — Cooper, J. G., Catalogue of California Fos- 

 sils, Bull. 4, Cal. State Mining Bureau, p. 41, 1894. 



' ' Form lanceolate ; nuclear whorls three, fourth with ten strong vertical 

 riblets, continuing on next five whorls, but decreasing to six on body whorl ; 

 crossing entire whorl, but higher at middle, forming an obtuse angle, marked 

 by a strong revolving riblet ; one strong riblet parallel to this close to the 

 suture, and one below angle. On the body they increase to over twenty of 

 uniform size. Strong lines of growth cross these throughout, showing a 

 deep sinus, mostly posterior to the angle. Canal slightly twisted. Length, 

 0.08 ; mouth 0.29 long, 0.06 wide. Two specimens found at Marysville 

 Buttes by Mr. Watts. ' ' 



The canal of this species is entirely too long for a Mangilia. 

 The mouth is longer than the spire. The nodes on the body-whorl 

 do not decrease to six. Most of the whorls have eight or nine 

 instead of ten, and the body-whorl is no exception. 



Dimensions : Height, 40mm ; width of Body-whorl, 13mm. 



TUEEIS 1NCONSTANS (Cooper) 

 Plate 11, figure 5 



Surcula inconstans Cooper. — Cooper, J. G., Catalogue of California Fos- 

 sils, Bull. 4, California State Mining Bureau, p. 40. 1894. 



' ' Shell long, fusiform, whorls about ten, the first two turbinate, 

 smooth; third to sixth with ten or twelve transverse close-set ribs, which, 

 on the other four whorls, show only on the posterior half of each, being 

 replaced by eight or ten revolving riblets, forming a cancellated sculp- 

 ture near middle, and toward the canal appearing alone. Mouth narrow, 

 sinus at angle, canal long. Dimensions, length, 1.10 inch; breadth, 0.25 

 inch, mouth, 0.50 inch. ' ' 



The figure is triple the natural size. 



Rare at University of California Locality 1853. 



Dimensions : Length, 12mm ; width of body- whorl, 4mm. 



