40 PHRONTIS. 



The name adopted for this species is not the earliest one, but 

 it is too well established to be superseded without disadvantage 

 to science, especiall}^ as N. glauca, C. B. Ad. (fig. 167), which 

 has a year's priorit}' of publication, is not positively identified. 

 Several Pacific Islands and East Indian species have been sup- 

 posed bj^ Carpenter, Marrat, Pease and others to be identical, 

 but though resembling tegula in sculpture, the painting in all 

 these is different. 



N. ANNELLiFERA, Reevc. PI. 12, fig. 108. 



Yellowish, encircled by bands of brown, thread-like lines. 



Length, -7 inch. 



Habitat unknown, 

 I know nothing about this species. 



N. Sanct^-Helen.b, a. Adams. PI. 12, fig. 169. 



White, interruptedly banded with red. Length, "3 inch. 



St. Helena, in sandy mud, at 20 fathoms. —Cuming. 

 Said to resemble N. ambigua, Mont. 



N. OBTUSATA, A. Ad. PI. 12, fig. no. 



Whitish, filleted with red spots or interruptedly banded. 

 Length, '65 inch. 



I. of Ticao, Philippines (in coral sand, at 7 fathoms, —Cuming). 



" Chiefly distinguished," says Reeve, " by the obtuse, widely 

 separated character of the ribs, and the fine-ridged sculpture of 

 the interstices.'' I have before me a series of specimens said 

 to come from the Straits of Malacca, which correspond well 

 with the figure of this species. They are heavier, larger and 

 more quadrate in form, yet closely resembling the West Indian 

 N. ambigua. 



X. FissiLABRis, A. Ad. PI. 12, figs. 171-173, 179. 



Ash-colored, faintly light banded, or whitish and interruj)tedly 



red-banded. Length, •6-*75 inch. 



Philippmes. 



The posterior channel of the aperture, may have been more 



developed than usual in the type of this species, but it is a 



character which pervades most of the species of this group. N. 



nodicoslata, A. Ad. (fig. 172), N. crenoU.rata, A. Ad. (fig. 179), 



and N. Stearnsiana (Garrett). Marrat. are equivalent forms — the 



