109 



July 9th. 1844. 

 "VVilliam Horton Lloyd, Esq., in the Chair. 



Mr. Yarrell laid upon the table three specimens of the Rana escu- 

 lenta, of clifFerent stages of growth, from Foulmire, Cambridgeshire, 

 presented to the Society by F. Bond, Esq. 



" Descriptions of a number of new species of Shells belonging to 

 the genus Cytherea," by Sylvanus Hanley, Esq. 



Cytherea varians. c. testd ovato-cordatd, incBguilaterali, snbven- 

 tricosd, tenuiusculd, albd, maculis et lineis angulatim flexuosis cas- 

 taneis variegatd, concentrice {et antici jjreEsertim) sulcato-striatd ; 

 lunuld magnd, cordatd, lined impressd circumscriptd, albd, maculd 

 castaned aut livido-purpurascente basi ornatd ; pube caslaneo vemt- 

 latd ; superficie internd omnirib albidd ; margine integro ; cardine 

 ut in C. Iseta. Long. 1 ; lat. \Ao poli. 

 Index Tęst. Sup. 1. 15. f. 33. 

 Hab. Brazil. 



Easily distinguished from Iceta and oblicuafa by its lunule, and 

 from pellucida (to which in colouring and general contour it approxi- 

 mates) by its close and irregular groove-like strise. 



Cytherea obliquata. C. testd ovato-cordatd (interdum oblongo- 

 cordatd), tumidd aut ventricosd, solidiusculd, sublcBvigatd, albidd, 

 lineis angularibus minutissimis brunneis aspersd; margine liga- 

 mentali convexiusculo, subdeclivi ; ventrali subarcuato ; lunuld 

 magnd,indistinctd,colorum experte; natibus valdi obliguis, candidis; 

 ligainento angusto ; extremitate posticd obtusd ; superficie internd 

 albd aut albido-rosed ; margine integro. Long. 1*75 ; lat. 2*50 poli. 

 Index Tęst. Sup. t. 15. f. 24. 



Hab. ? Mus. Cuming, Hanley, &c. 



A species which for a long tirae has been confounded with Iceta, 

 whose dentition, lunule and general shape it possesses. It is how- 

 ever a broader shell, \vith the beaks still more obliąue, and its surface 

 invariably speckled \vith minute scattered linear zigzags, which are 

 more closely congregated near the swollen umbones. 



Cytherea plebeia. C. testd suborbiculari, subguadratd, valde 

 incEguilaterali, solidd, compressiusculd, sgualide albidd, f ulvo varie- 

 gatd (intus lividd), concentrice et cotifertissime sulcatd ; margine 

 ligamentali convexo et subdeclivi ; postico dorsali paultiliim subre- 

 tuso et valde declivi ; ventrali arcuato ; umbonibus haud compla- 

 natis et minime striis divaricatis instructis ; lunuld lanceolatd, 

 albd; margi?ie interno subcrenulato. Long. 1 ; lat. 120 poli. 



Index Tęst. Sup. t. 15. f. 37. 



Hab. Catbalonga, Philippines. Mus. Cuming, Hanley. 



This species is allied to the type of its subgenus, the Circe scripta, 

 but the compressed umbones of that shell at once distinguish it. 



Nos. CXXXVII. CXXXV1II. & CXXXIX.— Proc. of Zool. Soc. 



