MUSEUM OF COMPARATIVE ZOOLOGY. 129 



Genus CANCELLARIA Lamarck. 



Cancellaria reticulata Linne. 



Valuta reticulata Liniid. S. N., XII. p. 1100, 1707. 



Cancellaria reticulata Lamarck, Prodrome, p. 71, 1799; An. 8. Vert, VII. p. 112, 

 1822 ; Sowerby, Tlies., II. p. 442, pi. xcii. fig. 17, 1848. 



Habitat. South Carolina (Gibbes and Ravenel) to West Indies. Sarasota 

 Bay, Sanibel Island, Punta Rasa, Long Key, and Charlotte Harbor (Stearns, 

 Hemphill, Mastin, and others). Nassau, N. P., U. S. Fish Commission. West 

 Florida, 30 fms., (a fragment,) U. S. Steamer Bache. 



This is the type and most common species of the genus. It is abundant in 

 South and West Florida, and somewhat less so on the shores of the Antilles. 

 It is reported from the Pliocene and Post-pliocene by Tuomey and Holmes, 

 and is found rarely on the coast of the Carolinas. The fossil Cancellaria de- 

 pressa of Tuomey and Holmes is hardly more than an extreme variety of this 

 species. Their C. venusta of the Pliocene beds is evidently a different thing. 

 So is the Pliocene C. Conradiana Dall, from Florida, a slender form, of which 

 the Fish Commission seems to have dredged a few fragments in a recent 

 state ; but the C. venusta of Holmes in the Post Pliocene volume is not a Can- 

 cellaria at all, but a Tritonidea, probably T. cancellaria Conrad, Beside these 

 there are only six recent species of Cancellaria proper yet known from the An- 

 tillean region. These are C. reticulata, C. rugosa Lamarck, C. tenera Philippi, 

 and three others discovered recently by the Fish Commission. 



I find among some shells supposed to be from Nassau, New Providence, two 

 specimens of C. similis Sowerby, and one of C piscatoria Gmelin, both West 

 African species and probably adventitious. I think it worth mentioning, how- 

 ever, for one would expect to find some West African species on the outer line 

 of the Antilles. C. rugosa has obstinately been referred to China by the 

 Monographers, except Tryon, but it is a rather common West Indian species. 

 Perhaps it has a Chinese analogue with which it has been confounded. 

 C. Sdmpsoni Calkins is a very distinct form, somewhat analogous to C. hullata 

 of West America, but the species described from Yucatan by Philippi under 

 the name of C. tenera, from the description, must be very like it. It has 

 not been figured, but, if identical with C. Stimpsoni, as I believe it to be, 

 Philippi's name has many years priority. 



Subgenus TRIGONOSTOMA Blainville. 

 Trigonostoma Smithii Dall. 



Plate XXXVII. Fig. 1. 



Cancellaria Smithii Dall, Agassiz, Three Cruises of Blake, IL p. 70, fig. 292, 1888. 



Shell reddish brown, turrited, scalar, with 8-9 corded varices; the interior of 

 the aperture darker and redder, the outer lip arched, sharply internally lirate ; 



TOL. XVIII. 9 



