APPENDIX TO SECTION IV. 



Since the above species were described, a few additional ones 

 have been received, which are described below, together with one 

 or two which had been overlooked before. 



FICUS, Rousseau. 



F. MAMILLATUS, n. S. 

 PI. 32, Fig. 276. 



Shell moderate in size, thin, rounded; spire low; whorls five, 

 rapidly increasing in size, the first one smooth and rather promi- 

 nent, presenting a mamillated appearance ; suture distinct. Sur- 

 face marked by numerous small, sharp, revolving ribs, crossed 

 by finer longitudinal lines. Columellar lip sinuous, emarginate 

 above, convex below ; outer lip simple. 



.Figure, drawn from a smaller specimen to the scale of the largest fragment. 



Locality: Near Fort Tejon; Dr. Horn. 



This beautiful species resembles, in its sculpture, Fusus (Hemifusus) Rimondli, 

 found at the same locality ; but the shell can be at once distinguished by its more 

 convex whorls and shorter spire. There is a difference also in the sculpture ; the 

 revolving ribs in this species are larger than the longitudinal ones ; while in the 

 other species both sets are nearly of the same size. 



(211) 





