bir PROCEEDINGS OF THE NATIONAL MUSEUM. 215 
Genus OCINEBRA Leach. 
Ocinebra circumtexta Stearns. Pl. xx, fig. 2. 
Not rare under stones at Portuguese Bend. _ 
Ocinebra circumtexta var. 
Three or four, without bands. (R. E. C.5.) 
Ocinebra foveolata Hds. 
One. (W.H.D.) Trowbridge. Southern fauna. 
Ocinebra foveolata var.? 
Two. “A variety, probably.” (W. H. D.) Trowbridge. 
Ocinebra gracillima Stearns. 
A few at Point Fermin. (R. E. C. 8.) 
Ocinebra interfossa Cpr. 
Three or four sea-worn examples. 
Ocinebra subangulata Stearns. 
Two or three shells found. (J. G. C.) 
Ocinebra Poulsoni Nutt. 
Often inhabited by crabs. 
Ocinebra lurida Cpr. Pl. xx, fig. 7. 
San Pedro, U. S. Nat. Museum. 
Ocinebra lurida var. mundaCpr. Pl. xx, fig. 3. 
Catalina Island. (W. H.D.) 
Genus PTHRORHYTIS Conrad. 
Pterorhytis Nuttalli Conr. (Cerostoma Nuttalli, of authors). 
Not rare in rock pools; often inhabited by crabs. Some shells are 
dingy- white, others a reddish-brown color. The name Cerostoma is pre- 
occupied. The name Pterorhytis was substituted for it by Conrad after- 
wards. (W.H. D.) 
Pterorhytis trialatus Sby. (Murer trialatus Sby.). 
Have seen three good examples, one found by a Mexican. Shells. 
rare, and usually badly sea-worn. 
