326 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
referred to in Petit’s or Tryon’s catalogue of the genus. Yet I describe 
it with hesitation, since it seems extraordinary that so common a shell 
should not have been already described. 
Astyris lunata Say. 
Tampa, abundant on the “coon oysters;” also at Cedar Keys, all 
varieties, very common on'the sand between tides. 
Witidella cribraria Lam. Melanitic variety. 
Key West, abundant under stones between high and low water. 
Anachis avara Say. 
Key West, on massive rocks at low water, abundant; many varieties 
of color. 
Anachis semiplicata Stearns 
Sarasota Bay, rare, on the beach. Also at Cedar Keys. 
Anachis acuta Stearns. 
Sarasota Key, on the beach, rare. 
Anachis ostreicola Melvill. 
Cedar Keys, on ‘‘coon oysters,” stones, &e. 
This species was not deseribed by Melvill, but is evidently what he 
refers to. It is exactly like A. cancellata Gaskoin, except in size, being 
much smaller than Reeve represents the latter to be, but I have no speci- 
mens of Gaskoin’s species to compare it with. Melvill says it is allied 
to A. nigricans, which is a Panama species. 
Columbella rustica Lin. 
Cedar Keys, living. 
Eupleura caudata Say. 
Cedar Keys, very fine. Stunted specimens of this species have been 
referred erroneously to HL. muriciformis Brod., a west coast species. 
Urosalpinz tampaénsis Conrad. 
Sarasota, on oysters brought in by boats, and also on egg cases of 
Busycon perversum, which it is fond of devouring. This seems to me 
quite in place in this genus, and not referable to Hupleura, from the 
shell. Also at Cedar Keys. The operculum is purpuroid. 
Urosalpinx cinereus Say. 
Cedar Keys, on rocks, oysters, &¢., and in similar localities at Saint 
Augustine. The Southern specimens are brighter colored and more 
neatly sculptured than those from New England, but doubtless quite 
as destructive. It is the “drill” of the oystermen, and very injurious 
to their young oyster “seed.” Operculum purpuroid. 
Muricidea floridana Conrad. 
On rocks, oysters, &c., between tides at Sarasota Bay. The operecu- 
lum is muricoid and it is not a Urosalpine. 
