CYPfi^EA. 43 



generally resembles radians. Its colour is that of the ordi- 

 nary pediculus, and the spots on the back are divided ; the 

 ribs are also spotted and the dorsal groove is narrow. De- 

 pauperata is quite distinct. It has a narrow groove, in 

 which the very few ribs, slightly swelled, but not tubercu- 

 lated, meet alternately. 



150. pediculus, Linn., (f. 429-438). — C. testa ovato-sub- 

 globosa, carneo-grisescente, vel subrosca fuscescente super 

 costas marmorata ; dorso rotundo, maculis fuscis semipicto; 

 costellis numerosis, subundatis, plurimis ad sulcum dorsalem 

 in tuberculum parvnm desinentibus, alteris interstitialibus ; 

 interstitiis granosis ; sulco dorsali angusto, elongato, margi- 

 nibus termmalibus lateralibusque subangulatini reflexis in- 

 crassatis ; basi convexa ; columella utrinque varicosa, sulco 

 columellari lato. 



Var. globosa, marginibus crassissimis (f. 430) . 



Var. colore fusco-rubescenti, lateribus basique fumeo-pur- 

 pureis ; costellis paucioribus, basalibus albis, marginibus cras- 

 sissimis elevatis. — C.labiosa, Gaskoin (f.433,434 et 435, typ.). 



Var. parva, rubra. — C. coccinella, Lamk. 



Var. costelhs subcrenulatis, colore fumeo-fuscato ; maculis 

 dorsalibus tribus lateris dextri in maculam unam coalescenti- 

 bus et expansis. — G. cimex, Hugh Owen (f. 436, 437, 438). 



Note. — In this species the base is turned upwards at the 

 sides in a peculiar manner, so as to form a marginal ridge, 

 as seen from the back. In the variety named 0. labiosa, and 

 afterwards acknowledged as a variety of pediculus by Mr. 

 Gaskoin, this peculiarity is exaggerated, as is also the dis- 

 tance of the basal tooth-ridges. It is also of a different 

 colour from the ordinary shell, and the ribs are smoother 

 than usual in the species. These peculiarities happen to 

 concur in Mr. Gaskoin's type specimen, which is unique, but 

 they also occur separately or interchangeably, or in different 

 degrees in many specimens and varieties. In var. cimex the 

 tendency of the species to crenulation or waving in the 

 dorsal ribs is exaggerated, and another peculiarity is, that on 

 the right side of the back the usual three dark patches are 

 amalgamated into one blotch covering one side. 



151. Mavqerim, G-raij, (f. 450, 451). — C. testa subpyri- 

 formi, ovata, fulvo-rosacea ; dorso rotundo, maculis grandibus 

 tribus medianis obscure tincto; costellis tenuibus, subflexu- 



