i24 EEY. B. BOOG WATSON ON THE 



pointed and sculptured apex ; the truncation of the lip is blunt, 

 and the species much more resembles a Limncea than any thing else. 

 There are no varices, nor any thickening of the outer lip, to connect 

 it with Alaba (see Adams' ' Grenera,' I. 241, and Ann. & Mag. Nat. 

 Hist. 1862, x. 294, and E. A. Smith, P. Z. S. 1875, p. 537) ; and 

 the truncated column distinguishes it from Diala. Of course if 

 Alaba (Diala) picta, Ad., with a faint approach to a truncation, 

 may be admitted to the subgenus whose characteristic features 

 already at each important point contradict those of the genus 

 itself, it is hard to say what may or may not be united to so 

 elastic a group ; but it seems safer at present to classify this 

 species as a Litiopa, to which, at the same time, I do not believe 

 it to belong. 



Cerithiopsis. 

 1. C. balteata, n. sp. 2. C. fayalensis, n. sp. 



1. Ceeithiopsis balteata, n. sp. 



July 29, 1874. Levuka, Fiji. 12 fms. 



Shell. — Small, dumpy, oval, reticulate, tubercled, strong, yellow, 

 with an inferior brown band. Sculpture. Longitudinals — there are 

 on the last whorl about twenty rows of tubercles, parted by narrow, 

 deepish furrows ; they diminish in number on the upper whorls, 

 but run very straight from whorl to whorl down the spire ; they 

 are largest and most widely parted on the penultimate whorl, 

 being rather crowded and narrow on the last. Spirals — on each 

 whorl there are two broad spiral threads, which rise into coarse 

 rounded tubercles, of which the upper row is the stronger. The 

 lower row is coloured brown. They are parted by a strong 

 furrow. On the last whorl the upper spiral divides into two 

 rather feeble ones, and the tubercles on the brown spiral diminish 

 in size. On the contracted base is a small furrow, within which 

 is a spiral broken into flat round tubercles. "Within this is a 

 squarish-cut furrow, and within this a small spiral forms the base 

 of the pillar, which hardly projects beyond it. The whole surface 

 of the shell is microscopically cross-hatched with longitudinal 

 lines of growth and spiral scratches. These latter are strong on 

 the point of the pillar. Colour is yellowish white, with a broadish 

 spiral band of brown, which embraces the whole lower spiral. 

 The whole surface is in this way pretty equally divided between 

 a white and a brown spiral band. The brown colour is probably 

 more crimson when the shell is fresh. Spire is short, contracting 

 rather abruptly, with a convexly curved contour. Apex broken. 



