lUYALYIA. 49 



2. Lima expansa, J. Soiverby. Tab. XT, fig. G. 



Lima expansa. J. Sow. in Dixon's Geol. of Sussex, pp. 91, 172, t. 3, fig. 34, 1850. 

 — — Morris. Cat. Brit. Fossils, p. 172, 1854. 



Spec. Char. L. testa pared, oblique orbicular!, sub transversa, lenui, fragili, subaqui- 

 laterali, depressiusculd ; extus striis radiantibus ornatis, interstitiisjaunctatis ; cardine brevi, 

 auriculis minimis, subaqualibm. 



Shell small, obliquely orbicular, slightly transverse, thin, fragile, and subcquilateral ; 

 externally ornamented with about 40 rays, interstices punctated ; hinge short, with small, 

 nearly equal auricles. 



Diameter, | of an inch. 



Locality. Bracklesham (Edwards). 



" Much more orbicular than any other Lima I know, but much too oblique for a Pecten. 

 It is extremely rare. Mr. Edwards has one nearly perfect valve, and Mr. Dixon a fragment." 

 (Sotverby.) 



This small shell somewhat resembles in outline L. dilatata, Desh. Coq. foss. de Par., 

 p. 29S, pi. xliii, figs. 1 5 — 17. Our shell has about 40 — 4:3 rap, which are broad and flat, the 

 interspaces narrow, and prettily ornamented with transverse projecting ridges, between which 

 are rounded and deep punctations. The hinge-area in Mr. Edwards' specimen is broken 

 and not very distinct ; it was probably small, with small auricles. 



3. Lima soror, S\ Wood. Tab. XI, fig. 7, a, b. 



Lima obliciua. Morris. Catal. Brit. Foss., p. 1/2, 1854. 



Spec. Char. L. testa ovato-elonyatd, obliqud, inaquilaterali, tenia, striata, picdi-regione 

 taviyatd; striis anyulatis, irreyularibus ; umbonibus parvis, acutis ; auriculis minimi*, 

 brevibus, aquatibus. 



Shell ovately elongate, oblique, inequilateral, thin, striated, with small angular and 

 irregular ribs or riblets ; beaks small and pointed, auricles short and equal. 



Longest diameter, gths of an inch. 



Locality. Llighcliff, Barton (Edwards). 



There are two specimens of this species in Mr. Edwards' cabinet, and they are in a 

 sufficiently perfect condition to show a considerable, and what I presume is a specific, 

 difference from L. obliqua of Deshaycs, if I may judge from figures and descriptions of 

 that shell. 



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