188 BULLETIN OF THE 



dome of the mantle. The dentition is as usual, an edentulous obsolete central 

 plate with a single broadish tridentate sigmoid lateral tooth on each side. The 

 operculum resembles that of Chrysodomus in miniature, but the point is usually 

 defective. It is attached to the surface of the foot by about half its own sur- 

 face, which exhibits an ovate scar. Stimpson found the ovicapsules in 3 fath- 

 oms, on Sertularians, at Great Egg Harbor, New Jersey, August 7, 18G4. They 

 are about 1.0 mm. long and half as wide, on the ovate base; they are shaped 

 like a compressed volcano or balanus, the crater of which is represented by a 

 flat subcircular smooth apical disk, from the peripherj^ of which radiate to the 

 base about ten elevated thin, sometimes bifurcating ribs. There were about 

 thirty ova in each capsule, which had already assumed the larval shell. 



Beside this species, the following are known from the eastern and southern 

 coast of the United States and adjacent waters, though the list is not claimed 

 to be complete. 



Anachis catenata Sowerby, Antilles, Yucatan, Vera Cruz. 



Anachis haliceeti Jeffreys (costulata Jeffreys, Verrill, not of Cantraine), New 

 England and northward, in deep water. 



Anachis alhella C. B. Adams (from type described as Pleurotoma, +A. iontha 

 Ravenal and A. acuta Stearns), Cape Hatteras to Florida, low water to 50 fms. 

 There is a variety {A. samanensis Ball) which differs from the commoner form 

 by its fewer ribs, slightly longer canal, larger varix behind the outer lip, and 

 smoother back to the last whorl. It has been received from Florida and the 

 Keys, and Samana Bay, St. Domingo. The typical alhella is smaller than the 

 northern variety called iontha by Ravenel. 



Anachis pulchella Kiener. (C costulata C. B. Adams, not Cantraine, from 

 type. This is wrongly referred to catenata Sowerby by Tryon.) Antilles and 

 Florida Keys. 



Anachis obesa C. B. Adams (C. ornata Ravenel, C. cancellata Gaskoin, 

 C. ostreicola Melvill), North Carolina to Florida, Texas, and Vera Cruz ; also 

 the Antilles generally. The dark brown or black ones are var. ostreicola. 



Anachis Hotessieriana Orbigny, has been obtained in 30 fms. near the Ba- 

 hamas, and would appear to be a good species. It is the smallest of all, and 

 has been reported from Cuba and Guadelupe. 



When one reaches such species as C. Verrillii it is impossible to tell by the 

 shell in which subgenus they should be located. 



Anachis amphissella Dall. 



Plate XIX. Fiff. 10 c. 



Columbella {Astyris'i) amphissella Dall, Bull. M. C. Z., IX. p. 91, 1881. 



Habitat. Yucatan Strait, 413-640 fms. 



A variety (which may take the name of Rushii) of this species was dredged 

 by Dr. Rush, U. S. N., off Fowey Rocks, Florida Straits, in 465 fms. It is 



