smith: DESCRIPtlON OF NEW SPONDYLUS AND HELIX. 73 



observable. The base is similarly sculptured, but the radiating 

 lines of growth have a rather coarser appearance. A few in- 

 dented irregular concentric lines upon the base, and a few 

 short oblique ones upon the body-whorl above the keel and 

 behind the lip, may be individual rather than specific characters. 

 The aperture is oblique, whiteish within, and much pointed 

 and channelled in front at the termination of the keel. The 

 upper lip is thin, expanded, and tinged with dark brown at the 

 edge ; the lower also is similarly coloured, is strongly reflexed, 

 and in the umbilical region somewhat expanded. The termina- 

 tions of the peristome are remote, but connected by a thin 

 layer of callus upon the flat surface between. 



The single specimen, all that is known of this species, has 

 recently been purchased by the British Museum. Until lately 

 it formed part of a collection which was got together many 

 years ago, and which remained packed up for fifty or sixty 

 years. Although no locality accompanied the shell, we can 

 safely assume, from its resemblance to allied forms, that it was 

 an inhabitant of New Guinea or some adjacent island. H. 

 ferussaci of Lesson, and H. exsulta?ts of Canefri, are the 

 nearest allies. Neither of these species is nearly so large as 

 that now described. The former is higher in proportion to the 

 width, and is described and figured as being of an uniform 

 rich chestnut colour, excepting the golden yellow carina and 

 edging to the suture. On the contrary H. hedleyi is much 

 wider in proportion to the height, and the difference of colour 

 between the upper and lower surfaces is most marked. Besides 

 this the aperture in Lesson's shell appears to be dark brown, 

 whereas in this it is white. From H. exsultans the present 

 species is distinguished, not only by its considerably larger size, 

 but also by a difference of colouring and the greater flatness 

 of the whorls and the base. 



I have named this interesting form after Mr. C. Hedley, 

 author of several valuable papers on terrestrial mollusca of 

 Australia, New Guinea, etc. 



