60 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Unfortunately his figures do not correspond to the descrip- 

 tion. The number of axial ribs of this species is much greater 

 than in R. canalifera. The differences between this species 

 and R. simplex Gabb are readily seen upon comparing the 

 figures. (See Plate 6, figures la, lb). 



Cypraea mathewsonii Gabb 



Cyprcea Mathewsonii Gabb, W. M., Geol. Calif. Palaeontol- 

 ogy, vol. 2, p. 164, 1868. 



Plate 6, figure 5 

 This small form is abundant at Gal. Acad. Sci. Locality 245. 

 It differs from C. bayerquei Gabb, (See Plate 6, figure 4a, 4b). 

 in its greater thickness and in its shorter length. It is not 

 common at most Tejon localities and as far as known it is 

 characteristic of the Rimella simplex Zone. Cyprcea bayerquei 

 has apparently the same upper limit. 



Melania packardi, new species 

 Plate 6, figure 6 



Shell elongate, slender, with flat sided whorls ; about twelve 

 parallel axial ribs which are crossed by six or seven weaker 

 spiral lines decorate each whorl ; rectangular spaces between 

 two sets of lines having greater length parallel to spiral lines ; 

 suture wavy, distinct. 



This species is readily recognized by its characteristic deco- 

 ration. 



Dimensions: — Length of broken type, 18mm.; width of 

 body-whorl, 8mm. 



Type: — No. 299, Cal. Acad. Sci. Locality 183. in the west 

 bank of the Cowlitz River about one and three-fourths miles 

 southeast of Vader (Little Falls), Washington, about one- 

 half mile south of Locality 182. 



Named for Mr. Earl L. Packard who collected many speci- 

 mens from this locality. 



Melania vaderensis, new species 



Plate 6, figure 7 



Shell elongate-conic with nearly flat sided whorls; whorls 



decorated by seventeen or eighteen slightly sinuous axial ribs 



crossed by four spiral lines of nearly equal strength ; suture 



wavy, distinct. 



