TRUNCARTA. 9 



X. SERRATA, Dufrcsne. PI. 5, figs. 50, 51. 



Livid olive, becoming chestnut-colored on the spire ; a hump- 

 like projection often occurs parallel with and just behind the 

 margin of the outer lip. Length, 2-2'5 inches. 



Panama; St. Elena, W. Col. 



Gray's name Bucciinun Northise, has priority, but has not 

 been adopted. Deshayos called it B. pristi* because Dufresne's 

 name was preoccupied in Burcimnn for a fossil species an ob- 

 jection which has no force since the shell has been dismembered 

 from that genus. 



X. ALBOPUNCTATA, Adams and Reeve. PI.. 5, fig. 52. 



Light yellowish, minutely punctate with opaque white, apex 



rosaceous. Length, *8 inch. 



Philippines. 

 X. RISSOIDES, Reeve. PI. 5, fig. 53. 



Whitish, with clouded yellow streaks. Length, *9 inch. 



Philippines. 



First described as a Pleurotoma. The specimen figured shows 

 a single rib or varix on the body whorl. Adams remarks that 

 N. albopunctata is closely allied to this species : I think it 

 probable that the}'' are identical. 



Genus TRUNCARIA, A. lams and Reeve. 



This genus is founded on a singular shell discovered during 

 the voyage of the " Samarang," and is principally characterized 

 by the abrupt truncature of its columella, and by its anteriorly 

 dilated aperture. 



T. FILOSA, Ads. and Reeve. PI. 5, fig. 54. 



Yellowish brown, maculated with two or three series of chestnut- 

 brown spots. Length, 1-1 inches. 



China Sea. 

 T. AUSTRALIS, Angas. PI. 5, fig. 55. 



Moderately solid, shining ; the two apical whorls thin and 

 papillose, the rest somewhat distantly and flatly longitudinally 

 plicate on the upper portion, the plica? crossed with fine im. 

 cd lines, the middle of the last whorl smooth, with a few 

 impressed lines near the base ; sutures grooved. Pale brown, 

 columellar callus white. Length, 7 mill. 



Port Jackson, Australia. 



