568 DESCRIPTIONS OF SOME NEW SPECIES OF PULMONATE MOLLUSCA, 



callosity or tooth on the body whorl in the aperture between the 

 inserted ends of the peristome. Length 58, breadth 27 mm. 



Hab. — Malanta Island, Solomon Islands (HobsoriJ. 



Type in my collection. 



When first presented with specimens of this shell, I was inclined 

 to look upon it only as a variety of my Bulimus scotti, described 

 in the Proc. Zool. Soc. of London of 1873, page 152 ; but the 

 examination of more recent additions to my collection, and of the 

 specimens in Mr. Hodgson's cabinet indicates that they are worthy 

 of separation. It is difficult to light on characters of this fine 

 group of shells which are specially occupants of the South Pacific 

 Islands, not including New Guinea. Their great holdfast appears 

 to be the Fiji and Solomon groups proper, a few coming from the 

 New Hebrides and other groups. This is a question which is 

 well worthy of being worked out. The group is in all instances 

 characterised by granular punctation of the apex, but the punc- 

 tation is not alike distributed in all cases; as a rule, it is in 

 transverse rows. Another character quite separates the group 

 into two divisions ; one is smooth, only showing longitudinal lines 

 of growth on the body whorl, the other division is invariably 

 transversely sculptured, with more or less straight rugae, in some 

 instances taking on more the character of lineations than of 

 ridges. 



Hedleya macleayi, gen. et sp.nov. 



(PL xxi., figs. 2, 5, 8, and 10.) 



Shell dextral, imperforate, thin, translucent, elongate, subcylin- 

 drical, slightly tapering and blunt at the apex. Colour amber. 

 Whorls 8J, tumidly inflated, gradually increasing, the last com- 

 prising nearly one-third of the total length. Sculpture, numerous, 

 tolerably regular, close, slightly curved, scarcely oblique, sharp, 

 erect ribs, of which about 45 ornament the final whorl ; they are 

 not continuous from whorl to whorl, do not anastomose, and are 

 separated by smooth interstices of two or three times their breadth ; 

 on the upper whorls these ribs grow weaker and closer, until they 

 fade away on the second and third whorls ; across the ventral 



