184 CHLOROSTOMA. 



C. MACULOSTRIATUM C. B. Adams. PI. 24, figs. 88, 89. 



Shell umbilicate, conical, solid, deep green, brown, pinkish or 

 olivaceous, more or less dotted with white and a self-color, sometimes 

 radiately flam mu late with white ; a tract around the umbilicus 

 white, tessellated with brown. The spire is elevated, sometimes 

 scalariform ; the apex acute ; upper whorls slightly convex, the last 

 convex, depressed below the suture, rounded at the periphery ; the 

 whole surface bearing numerous low, smooth spiral striae, which are 

 often subobsolete on the last whorl, and it is then nearly smooth ; 

 base concave in the middle; aperture rounded-quadrate, smooth 

 within or finely lirate; columella slightly sinuous, bideiitate at base, 

 expanding in a callus above, which slightly impinges upon the um- 

 bilicus. Alt. 9, diam. 10 mill. 



West Indies generally. 



Trochus hotessierianus D'ORB., Moll, de Cuba, ii, p. 59, t. 18, f- 

 15-17 (1853). PHILIPPI, Conchy I. Cab., p. 270, t. 39, f. 15. T. 

 oecultus PHILIPPI, Abbild. u. Beschreib., ii, Trochus t. 6, f. 8 

 (1845), and Conchy 1. Cab., p. 156, t. 25, f. 8. Monodonta macnlo- 

 striata C. B. ADAMS, Proc. Boat. Soc. N. H., 1845, p. 6. T. macido- 

 striatus PHIL., Conchy I. Cab., p. 120, t. 28, f. 7. FISCHER, Coq. Viv., 

 p. 254, t. 86, f. 1. 



This species when fully developed is elevated, finely, regularly 

 spirally striate, with much smoother surface and more regular smooth 

 sculpture than C. scalaris, as well as narrower umbilicus. The fully 

 developed form is T. hotessierianus of d'Orb. Younger shells are 

 less elevated, and more conspicuously sculptured ; and I at first drew 

 up a description of them under the name of T. oecultus Phil. ; the 

 same form is the J/. mdculo-atriata of Adams. These two names 

 were both proposed in 1845, and as far as I know there is no means 

 by which the priority of either may be proven, j he description of 

 T. oecultus Phil.=maculo-striatus C. B. Ad., is as follows : (PI. 24, 

 figs. 84, 85). 



Shell small, umbilicate, depressed conical, dark olive- brown 

 (bistre) or umber colored, dotted more or less with white, especially 

 beneath ; ivhorls slightly convex ; suture impressed ; apex acute, 

 leaden or whitish ; whorls 5, moderately convex, spirally finely lirate, 

 the line 8 to 12 in number on the penultimate whorl, smooth, 

 narrower than the interstices, which under a strong lens appear 

 obliquely striate, often with a central spiral riblet ; there are often 

 one or two more prominent lira? about the middle of the whorl 



