1917] Nomland: The Etchegoin Pliocene of Middle California 237 



and more acute spire, the presence of small spiral intercalates, and 

 the sharper angle at shoulder of whorls. 



Occurrence.— At localities 2986, 2985, 2988, 2643; middle Etche- 

 goin. 



TEOPHON BELCHEEI AVITUM, n. var. 

 Plate 11, figure 5 

 Type specimen no. 11094, Univ. Calif. Coll. Invert. Palae. 



Shell large, heavy, with five or more whorls ; spire moderately 

 elevated ; suture appressed. Whorls angulate at shoulder, with promi- 

 nent angle at lower part of body-whorl ; immediately below this is a 

 deep groove which varies considerably in size in different specimens 

 and in front of which the lower part of body-whorl protrudes. Whorls 

 and canal ornamented by about eleven raised axial folds or varices 

 which at the shoulder become sharp spines, also at lower angle of 

 body-whorl where intersected by varices the shell usually becomes 

 nodose. Outer lip thin, canal slightly recurved. Height of type, 

 66 mm. ; diameter of body -whorl, 60 mm. 



This species differs from Trophon belcheri Hinds by shorter and 

 stouter nodes at shoulder, rather prominent nodes near base of body- 

 whorl, shorter columella, and lower spire than most specimens of 

 T. belcheri. From T. magister Nomland it differs in having a larger 

 number of varices, in being more spinose at shoulder, and by more 

 evident development of nodes on lower part of body-whorl. 



An interesting problem in evolution could probably be solved by 

 a study of the large Trophons having the characteristic groove imme- 

 diately below the body-whorl. In the lower Miocene this type first 

 appears as T. gabbianum Anderson ; in the upper Miocene it takes the 

 form of T. carisaensis Anderson ; in the Pliocene we find T. magister 

 Nomland, while the Recent form is T. belcheri Hinds. 



Occurrence. — -At locality 2988, middle Etchegoin. 



CANCELLAEIA CEASSA, n. sp. 

 Plate 12, figures 7, 7a 

 Type specimen no. 11098, Univ. Calif. Coll. Invert. Palae. 

 Shell slender, solid, with about five whorls; suture distinct, im- 

 pressed. Whorls sharply angulated a little less than one-third of the 

 distance below suture, somewhat tabulate above ; near the base of the 

 body-whorl is another distinct angle, giving the periphery of whorls 



