138 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.87 



tubercles and a little heavier one immediately anterior to the major 

 portion of the tubercles. This on the early turn falls into the suture, 

 but on the last whorl is slightly posterior to it. Of the tubercles 

 12 are present on the first of the postnuclear turns, 10 on the second, 

 third, and fourth, 11 on the fifth and sixth, and 6 on the last half 

 of the last turn. In addition to the above sculpture, the entire spire 

 and base are marked by numerous, closely spaced, spiral threads, 

 which in combination with the slightly weaker incremental lines 

 lend to the surface, under high magnification, a somewhat fenestrated 

 aspect. Base moderately long, marked by 3 tuberculated spiral cords. 

 Columella stubby, marked by 9 spiral cords, which range from as 

 strong as the last basal to mere threads at the tip of the columella. 

 Aperture irregularly pyriform, decidedly channeled anteriorly; 

 outer lip with a very deep sinus a little below the summit whose 

 edge is reflected. Posterior to the sinus there is a heavy hump an- 

 terior to the sinus and the outer lip is protracted into a clawlike 

 element, which is rendered sinuous by the external sculpture; inner 

 lip reflected over the columella as a very heavy callus, which extends 

 up on the parietal wall. 



The type, U.S.N.M. No. 508649, was collected by H. B. Olds at 

 Waveland, Dade County, Fla. It has 10 whorls and measures: 

 Length, 12.5 mm. ; greater diameter, 5.0 mm. 



We have seen specimens also from Cape Sable, Cape Romano, 

 Marco, Punta Rasa, and Sanibel Island. 



EXPLANATION OF PLATE 17 



Cerodrillia {Cerodrillia) perryae, new genus and species; 2, Pyrgocythara 

 hemphilU, new species; 3, Ruiellatoma diomedea, new genus and species; 4, 

 Cerodrillia (Cerodrillia) clappi, new species; 5, Crassispira {Crassispirella) 

 tampaensis, new species, tip; 6, Bellaspira virginiana (Conrad); 7; 

 Kurtziclla perryae, new species, detail of sculpture; 8, Cerodrillia (Lisso- 

 drillia) scJiroederi, new species; 9, Eiirtziella perryae; 10, Monilispira 

 monilis, new genus and species; 11, Crassispira (Crassispirella) sanibelensis, 

 new species; 12 C. (C.) saitibelensis, tip; 13, C. (C) tampaerms. X 5. 



U. S. GOVERNMENT PRINTING OFFICE: 1939 



