224 Mr. Cosmo Melvill on the 



sented a link ; indeed in the largest of my specimens of 

 this variety some of the dorsal spots are distinctly ocel- 

 lated. I have never, however, seen in C. ocellata, or any of 

 the " spiirca " group, the slightest symptom of the square 

 lateral blotches, so characteristic of erosa, though absent in 

 one of its varieties. Locality, Borneo. 



C. ocellata (L.) differs mainly from all these varieties by 

 its greater distinctness of ocellation and marking. It is a 

 neater and more compact shell in every way. 



{a) palatha (van nov.), (fig. 14). Ocellations less pro- 

 minently coloured, with a tendency to become obsolete, 

 otherwise as in the type. This variety connects ocellata with 

 erosa still more closely, the two distinctions which still 

 remain being absence of blotches on the sides, more distinct 

 lateral clouding, and the conspicuous orange-brown tinting 

 of the teeth and extremities on the underside. The speci- 

 men in the plate is in Coll. Mus., Owens College, Manchester, 

 formerly in that of Mr. Reginald Cholmondeley, of Condover 

 Hall, near Shrewsbury. 



0. spicrca (Linn.). Cf. Sowb., T. C, f 118 — 122. This 

 common Mediterranean and Atlantic Island species is not 

 so variable as C. erosa ; some of its forms are more pyriform, 

 and the marking is more distinct, often with slight ocellation 

 on the dorsal surface; I hold that C. flaveola (L.) is of true 

 specific rank, although I am not quite so sure that C. ceiniica 

 (Sowb.) from Mauritius is not a more beautiful and tropical 

 form of spiirca, var. {a\ and as such I have placed it in the 

 subjoined table. I certainly have intermediates. Sowcrby 

 (Thes. Conch., pi. xxvi., f 238 — 240) remarks upon the dorsal 

 white spots being round and clear. I have a specimen with 

 distinct trace of ocelli, as in spiirca. C. flaveola seems to be 

 constant in small size, oblong form, and clear dorsal mark- 

 ing. It connects the erosa-spitrca section with the cribrarice. 

 C. spurca (L.). {b) Verdensiiun (var. nov.). Smaller than 

 type, compact, sides slightly thickened, dorsal surface spotted 



