PROCEEDINGS OF THE CONCHOLOGICAL SOCIETY. 6 1 



community of origin, and reasonably look for and expect some 

 diversity in aspect and plan if peculiarities such as these were 

 originating independently in a number of totally distinct species. 

 On this ground we are disposed to think that species like 

 cantiana, cartiisiafia, etc., have descended from banded forms 

 and still retain characters in common which point to their 

 probably identical origin. 



As has been frequently shown, the nature of the habitat 

 materially influences shell-markings. IT. inigata may be in- 

 stanced as a striking example, and it is quite conceivable that 

 owing to changes of habit or habitat some amount of, what we 

 may designate for want of a better term, oscillation may have 

 taken place in the intensity or obliteration of band-markings. 



H. cartusiana var. lactescens Picard. — Mr. Hillman has 

 recently discovered, in England, an albine form of this shell, 

 which Mr. Jenner has named var. albida, but, as Picard had 

 previously distinguished this by the name of lactescens, his name 

 takes precedence. 



H. hispida L. The type specimen of this species in 

 the Linnean collection is the form named by Jeffreys If. 

 concinna. It has already been pointed out that no difference 

 in the organization has as yet been detected between what 

 have usually been termed H. hispida and H. concinna, and 

 that they should probably be united together as a single 

 species. It will be recollected that Dr. Jeffreys eventually 

 considered that the two forms should not be separated, but as 

 H. concinna had been accepted by others as a valid species, he 

 restored it to specific rank, and it would almost appear against 

 his own convictions of its specific value. If H. concinna be thus 

 accepted as the type form of II. hispida we must distinguish 

 the ordinary very hispid form, and perhaps we cannot do better 

 than adopt Mousson's name, hispidosa. 



H. granulata Alder is substituted for the name H. sencea 

 Muller, as it seems now to be almost universally considered that 

 Muller's species is not identical with Alder's, whose name is now 

 restored to the British form. 



