52 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Mitra albocincta C. K. Ad. Tortugas. 



Mitra sulcata Gm. Tortugas. 



Mitra floridana Dall. Tortugas. 



Erato mangueria Gray. Tampa Bay; west coast. Rare. 



Marginella car/tea Storer. Key West. 



Marginella guttata Dillw. Key West. 



Marginella apicina Mke. West coast. 



Marginella apicina, white var. Key West. 



Marginella opalina Stearns. Magill's Bay. 



Marginella aureocincta Stearns. One specimen was found in Sara- 

 sota Bay. 



Marginella pellucida Pfr. Sarasota Bay; Key West; abundant at 

 the Bahamas. 



Marginella roscula Red. West coast. I am doubtful whether this 

 is distinct from apicina. 



Marginella nit/da Hds. Magill's Bay. One shell was found at Key 

 West. 



Marginella paxittus Reeve. Sarasota Bay. 



Marginella catenata Mont. Tortugas; abundant. 



Marginella ovuliformis D'Orb. Red-fish Point; Tampa Bay. 



Marginella minuta Pfr. Tampa Bay. 



Marginella lachrymula Old. Tampa Bay. 



Marginella lactea Keiner. Key West; Tortugas. 



Marginella pallida L. Tortugas. 



Marginella nivea C. B. Ad. Tortugas. 



Olivella mutica Say. West coast. Quite variable. 



Olivella mutica Say, var. A small, yellowish variety, marked with 

 zigzag, brown lines, was dredged in Tampa Bay. 



Olivella mutica Say, var. nitidula Dillw. West coast. 



Olivella Jiivea Gm. Sarasota Pass. 



Olivella jaspidea Gm. Tortugas. 



Olivella floralia Due. West coast. 



Oliva literata Lam. Very abundant throughout the west coast, on 

 sand flats, at low tide, and extends west to Texas. 



Oliva literata, var. A golden yellow variety, which is almost en- 

 tirely devoid of markings, is rarely found on the west coast. 

 Oliva reticularis Lam. Key West. 



Columbella mercatoria L. The Keys; east coast, Cunningham. One 

 living specimen was dredged in Tampa Bay, in seven fathoms. A most 

 variable shell in size, form, and coloring. 



Columbella dysoni Reeve. Tortugas. A shell agreeing with Tryon's 

 figure and description of this was found on Tortugas, and I have the 



