1873.] DR. J. COX ON NEW LAND AND MARINE SHELLS. 5b7 



The third specimen, at the time unique, which was sent back to 

 me as a large variety of H. eras, I venture to describe as a new 

 species; for there are now many fine examples in the collection of 

 Mr. Hargraves from the constancy of the characters of which I am 

 enabled to exhibit a specific distinctness from others of the group. 



Helix (Geotrochus) macfarlanei, sp. nov. 

 Shell imperforate, thin, globosely conical, smooth, white, orna- 

 men ted with one broad black band encircling the last whorl at the 

 middle and a broad blackish-brown zone round the umbilical region, 

 also with dark brown or black interrupted broad zigzag lines runnin- 

 interruptedly across the last three whorls, with additional isolated 

 irregularly disposed round black spots, principally on the body- 

 whorl; apex pale, denuded of colour; transversely finely striated 

 above and below, and concentrically striated at the base ; whorls 6 

 rounded, gradually increasing in size, last slightly deflected in front 

 at its termination, base convex ; aperture obliquely ovate-lunate : 

 peristome slightly thickened and everted, margined internally with 

 white, and externally with orange ; interior of aperture tinged with 

 orange, the external dark band on the body-whorl showing through • 

 margins approximating, joined by a very thin callus ; columella 

 dilated externally, adnate over the umbilical region, internal margin 

 descending, straight. 8 



Diam. greatest 0-92, least 0"68 ; height 072 of an inch. 



tlab. Solomon Islands (mus. Cox). 



I have named this very beautiful species after its discoverer, 

 Captain Macfarlane, who has taken much trouble to collect the 

 shells from the above group, and whose careful observation has 

 greatly assisted in obtaining their correct habitats. It is somewhat 

 allied to it. coxianus of Angas. 



(The specimen sent was so broken in transit that it could not be 

 figured. — Ed.) 



Pupina grandis, Forbes, var. minor. 



Amongst a number of specimens recently obtained of this hitherto 

 very rare shell is a small variety, so small, indeed, as to mislead in 

 the identification of the species, if not pointed out. 



Length 088 ; breadth (HO of an inch. 



Hab. Louisiade Islands. 



A second variety, of a large size, with a white peristome, is also 

 worthy of note. 



Helix (Geotrochus) xanthochila, Pfr. (Plate XLVIII 

 fig. 7.) 



A variety of this fine species has been obtained in abundance 

 where the reflexed lip is converted into a beautiful broad crenulated 

 frill and generally pure white. So much does it alter the character 

 of the shell that it would lead to some difficulty in identifying the 

 species. It is no accidental deformity, as the variety is almost as 

 abundant as the original type. 



