﻿GABII.l.fiTJA 441 



Gaeillotia i,ocari)I Servain. 



"Shell obliquely rounded, subcompressed, thick, heavy, sur- 

 face shining', sulcate with concentric striae, fine except towards 

 the edges ; yellowish-brown, lighter on the unibonal region,, 

 which is a pale opaline-yellowish, and deepening on the pos- 

 tero-dorsal region to the color of a dead leaf, with much deeper 

 colored rays radiating from the beaks to the posterior extrem- 

 ity ; nacre bluish-white, beautifully iridescent. Valves gaping 

 only behind the ligament, their convexity, though normal and 

 regular, decidedly superior and extends almost to the center 

 of the umbonal region (greatest convexity 42 mm. at 4 from 

 the perpendicular, at 29 from the beaks, at 63 from the hinder 

 end, at 48 from the anterior end, at 35 from the postero- 

 dorsal angle and at 54 from the base of the perpendicular). 

 Dorsal margin comparatively short, feebly curved as far as the 

 postero-dorsal angle, thence sloping to the hinder end. An- 

 terior region expanded, rounded and cut away below. Basal 

 margin strongly curved. Posterior region short, scarcelv one 

 and one-half times as long as the anterior and narrowing 

 almost abruptly to a low beak, very obtuse, rounded, though 

 slightly truncate ; beaks nearly central, only a little prominent, 

 well roimded, feebly ridged, acute and very slight at their 

 extremities. Dorsal groove very slight, marked by a deeper 

 ray of color. Area slightly developed. Hinge edentulous, 

 flat, covered anteriorly by the antero-interior ligament, and 

 ending posteriorly at a short, hemisphrerical lunule. Ligament 

 short, very prominent and strong, chestnut-color. 



Length log, height 83, diam. 42 mm." (Servain.) 



Asia Minor. 

 Gahillotia locardi Servain. Bull. Soc. Mai. Fr.. VIL 1890. p. 



296, pi. V, fig-s. I, 2. — Simpson, Syn., 1900, p. 650. — Kobelt. 



Icon., new ed., XVIIL 191 2, p. 34, pi. xdvii, fig. 2639. 



Kobelt (1. c.) considers this to be only an insignificant vari- 

 ation of the preceding species. 



Gabillotia opperti (Bourguignat). 



Shell irregularly elliptical, being much more rounded on the 

 dorsal than the ventral region, subsolid, subinflated. quite in- 

 equilateral ; beaks low but sharp ; anterior end subangular at 



