22 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



[vol. 50 



cast, and is defective both at the apex and the end of the canal, but 

 still measures 142 mm. in length and about 32 mm. in maximum 

 diameter. The shell in this specimen, which is more solid than those 

 from the more eastern localities, has a maximum thickness in the 

 last whorl of about 3 mm. The surface, as in all the species of this 

 genus, is dull and rude, contrasting strongly with the brilliant polish 

 of the species of Volutomorpha from the same horizon. The shell 

 is proportionately more slender than any Volute, recent or fossil 

 which is known to me. 



TURBINELLIM] 



Genus PSILOCOCHLIS Dall 



PSILOCOCHLIS McCALLIEI Dall 



(Figures ii, 12, 13) 



Tnrbinella (Psilocochlis) McCalliei Dall, Nautilus, xvni, No. 1, pp. 9-io > 



May, 1904. 



F ig. 11. — Psilocochlis 

 McCxilliei Dall. 4/5. 

 Outer lip wanting ; the 

 enamel worn off a large 

 part of the shell. Type 

 specimen. Eocene of 

 Georgia. 



Fig. 13. — Psilocochlis 

 McCalliei Dall. 4/5. 

 Dorsal view of another 

 specimen, showing com- 

 plete investiture by a 

 coat of enamel conceal- 

 ing the sutures 



Fig. 12— Same as. 

 figure 11, turned so as 

 to show the plaits on 

 the pillar. The pro- 

 jection on the left is 

 the siphonal fasciole. 



Shell of about four whorls, of which the earlier three are com- 

 paratively small, the apex hardly rising above the general dome of 

 the spire, and still further concealed in the adult by a coating of 

 enamel with which the entire shell is varnished, concealing the 

 sutures ; shell widest at about the posterior angle of the aperture, 

 the last whorl diminishing forward and slightly constricted behind 



