158 ACT.EON. 



tinuous stipplings, which are round on the upper and oblong on^ 

 the last whorl ; between these furrows there often occurs a weaker 

 one formed in the same way; on the base they are small and 

 crowded; toward the upper suture they are strong; on the first in 

 particular they are so. Colour: the shell itself is translucent white, 

 but is covered with very thin yellow membranaceous epidermis. 

 Spire high, conical, and scalar. Apex very coarse and blunt, 

 slightly immersed, but not inverted. Whorls 6, rounded above, 

 cylindrical below ; the last is short and slightly tumid. Suture very 

 little oblique, strong and somewhat channelled. Mouth oval to 

 pear-shaped. Outer lip leaves the body at a right angle ; it is reg- 

 ularly arched throughout, patulous in front. Inner lip : a thin de- 

 fined glaze crosses the body and runs direct down the pillar with a 

 straight sharp edge, behind which is a minute chink ; the tooth, 

 which is close up to the body, is very slight and blunt. Alt. 0'31 

 in.; diam. 0'18. Penultimate whorl, height 0'08. Mouth, height 

 0-17, breadth 0-1. (Wats.). 



Off Oidebra Island, West Indies, 390 fms. ( Challenger). 



A. turritus Wats., Journ. Linn. Soc. Lond. xvii, p. 285 ; Chall. 

 Rep. Gastr., p. 628, pi. 47, f. 2.— Conf. Dall, Blake Rep. Gastr., 

 p. 40. 



This species is represented by only one specimen, of which the 

 outer lip is somewhat broken. The spire is extremely high and 

 scalar. In this respect, and in the rounded form of the whorls it 

 somewhat resembles AcUeon (Solldula) siduralis A. Adams ; but 

 the apex is much blunter, and the sculpture much finer than in that 

 species. ( Wats.). 



A. MELAMPOIDES Dall. PI. 20, fig. 33. 



Shell short, stout with a depressed spire and shouldered last 

 whorl; white, with five whorls, sculptured with punctate spiral 

 lines ; nucleus small, eroded ; other whorls with two, three, or (on the 

 last) twenty to twenty-five spiral lines, which are distinctly punc- 

 tate, with about ten punctations in the length of a millimeter; 

 the spirals are crowded just in advance of the suture and near the 

 pillar, and especially distant on the shoulder of the last whorl; 

 suture distinct, Avith the anterior margin finely crenulate in the 

 last whorl ; other sculpture of fine lines of growth and microscopic 

 revolving strise as in the last species ; outer lip hardly oblique, join- 

 ing the body at a wider angle than usual, owing to the shouldering. 



