318 ON SHELLS FROM THE LOO CHOO ISLANDS. [Mar. 1, 



Japan. On the contrary, the shells here described have a smoother 

 aspect and exhibit only the faintest trace of spiral striae. The 

 typical form of H. larcjUlierti, also from the Loo Choo Islands, is 

 considerably smaller, but of about the same proportions ; it has the 

 same number of whorls, a similar umbilicus and angulation at the 

 periphery, and the same very faint spiral striation. A variety is 

 described by PfeifFer with a single band just above the slight angle 

 of the body-whorl, and falling above the sutural line upon the spire. 

 The two specimens collected by Mr. Pryer have a similar band, and 

 a second situated three or four millimetres below the periphery. 

 Although so large, these specimens are evidently young, being very 

 thin, and having only partially developed the lip of the aperture ; the 

 internal thickening described as present in the type is only feebly 

 discernible. 



5. Helix connivens, Pfeiffer. 



Of the forty-six specimens of this species obtained by Mr. Pryer, 

 twelve only belong to the unhanded form, the remainder having the 

 single red line at the periphery as figured by Reeve and Pfeiffer. 

 The lip in both varieties may be either white or pinkish. 



6. Clausilia valida, Pfeiffer. 



Not one of the twenty-four examples of this species at hand 

 belongs to the brown-banded variety, all being of a uniform greyish- 

 yellow tint. The largest specimen, consisting of seven whorls, is 

 33 millimetres in length, or seven longer than the six-whorled 

 shell described by Pfeiffer. All have the spire decollated. 



7. Cyclophorus turgidus, Pfeiffer, 



None of the specimens obtained by Mr. Pryer are as large as the 

 types, also from Loo Choo, described by Pfeiffer ; but they agree in 

 every respect with the small form he mentions from the Ibyat, an 

 island of the Bashee group, situated some three hundred miles to 

 the south-west of Loo Choo. They appear to be pretty constant in 

 form, style of colouring, and in the decided peripherial carination ; 

 but the peristome varies from white to a reddish tint, and in some 

 specimens it is of a much more duplex character than in others. 

 The ojierculum is semitransparent, a little concave externally, and 

 consists of seven slowly enlarging whorls which are finely keeled at 

 the suture. 



C ibyatensis, Pfeiffer, from the same island as the small variety 

 of C. turgidus, differs only in having the last whorl rounded instead 

 of more or less carinate at the periphery. It should be regarded as 

 a variety of this species rather than as a distinct form. The British 

 Museum possesses quite a typical specimen of C. turgidus, from the 

 island of Formosa, presented by M. Dickson, Esq. 



8. Cyclophorus exaltatus, Pfeiffer, var. 



A single specimen only was obtained. It differs from Hong-Kong 

 and Formosan examples in having a slightly larger aperture, and an 



