OF CONCHOLOGY. 25 



DESCRIPTIONS OP NEW SPECIES OP SOUTH AMERICAN 



POSSILS. 



No. 1. Tertiary. 



BY WM. M. GABB. 



I have received from Dr. Antonio Raimondi, of Lima, Peru, 

 a fine series of fossils of that Republic, one of the results of 

 about eighteen years of explorations and collection in all parts 

 of the country. The series includes suites of Tertiary, Creta- 

 ceous, Jurassic and Carboniferous age, many of them in a beau- 

 tiful state of preservation ; many more too imperfect for deter- 

 mination. It is the intention of Dr. Raimondi to publish a large 

 work on the Geography, Geology, Natural History, &c., of his 

 country, and he has placed this material in my hands to enable 

 me to prepare the volume on Palaeontology. In vieAV of the 

 long time which may elapse before the appearance of the volume, 

 I propose to describe the new species in the present form, as a 

 preliminary, and hope to be able to hereafter republish them 

 with elaborate illustrations and more extended notes. 



The present paper is devoted to a series of fossils collected in 

 the vicinity of Payta, Peru, from some bluffs of Tertiary sands. 

 They vary considerably in lithological character and may belong 

 to two or more different eras. One set of four or five species 

 is made up entirely of extinct forms, while the remainder, more 

 nearly allied in appearance, seem to be, from the balance of 

 living and extinct species, on or near the horizon of the Plio- 

 cene. The notes accompanying the collection are meagre, and 

 indicate little beyond locality. 



FUSUS, Lam. 

 F. Paytensis, Gabb. 



Shell small, broadly fusiform, spire elevated ; whorls about 

 six (extreme tip broken), flattened and sloping above, slightly 

 convex on the sides ; body whorl prominently convex above, 



