1854.] 169 



Two fragments of this fossil have been found. Portions of the nacreous part 

 of the shell remain, and show distinctly the deeply foliated margins of the septa. 



This is the first notice of the occurrence of the genus Turrulites in the creta- 

 ceous rocks of the United States. 



Locality , Noxubie county, Mississippi. L. C. Richardson, Esq. 



GASTEROPODA. 



1. TURRITELLA. 



1. T. fasti giata. Shell regularly tapering; whorls somewhat flat, slightly 

 indented by a revolving line; suture impressed; body whorl angular below ; 

 aperture round. 



Locality. Noxubie county, Mississippi. Mr. Richardson. 



2. Phorus. 



1. P. umbilicatus. Shell depressed ; whorls four, uneven, concave below; 

 suture profound (in the cast); umbilicus deep, surrounded by a channel. 

 Distinguished from Phorus (Trochus) leprosus by the channelled umbilicus. 

 Diameter, 1.75 in. 

 Locality, Noxubie county, Mississippi. Mr. Richardson. 



3. Voluta. 



1. V. cancellata. Shell fusiform ; whorls cancellated by close vertical ribs, 

 and oblique revolving lines ; ribs obsolete towards the base. 



Locality, Noxubie county, Mississippi. Mr. Richardson. 



2. V.jugosa. Shell fusiform ; body whorl large ; w r horls few; suture slightly 

 carinated ; suture shell ridged or ribbed vertically. 



Distinguished by the coarse ribs from the other cretaceous species. 

 Locality, Noxubie county, Mississippi. Mr. Richardson. 



3. V. Spillmanii. Shell fusiform ; body whorl large ; whorls four, obso- 

 letely ribbed ; suture carinated ; base with numerous revolving lines. 



Locality, Columbus, Mississippi. Dr. Spillman. 



4. V. fusiformis. Shell fusiform; body whorl undulating, smooth ; suture 

 not impressed ; lip turned up (in the cast) at the upper edge of the aperture. 



A well marked fossil ; the casts are remarkable for the undulations on the 

 last whorl. 



4. Fusus. 



1. F. eufauliensis. Shell ovate: spire about half the length of the shell; 

 whorls five, somewhat carinated on the shoulder ; marked by vertical slightly 

 curved ribs, terminating at the carina in obsolete nodes ; suture impressed; 

 body whorl and aperture large ; canal abruptly bent. 



Locality, Eufaula, Alabama. Mr. Thornton. 



2. F. tnrriculus. Shell fusiform, gently tapering ; whorls convex, crossed 

 by vertical ribs; body whorl small ; aperture ovate, small ; canal abrupt. 



Distinguished by the small size of the body whorl. 

 Locality, Columbus. Dr. Spillman. 



5. PYRUr.A. 



1. P. trochiformis. Shell top-shaped ; body whorl large, inflated, covered 

 with revolving raised lines; spire depressed, not flat; angle of the body whorl 

 rounded; canal produced ; aperture nearly circular. 



Locality, Noxubie county, Mississippi. Mr. Richardson. 



2. P. Rich'jrdsonii. Shell top-shaped; spire depressed, almost flat; body 

 whorl angular, terminating suddenly in a canal. 



Inscribed to L. C. Richardson, Esq., as a mark of respect for his zeal in in- 

 vestigating the geology of Noxubie county. 



Locality, Noxubie county, Mississippi. Mr. Richardson. 



