I'AYLOR : ON TEStACELLA SCUTULUM. 347 



aperture of T. haliotidea is oval, the epidermis is greyish or 

 blackish, the surface always marked with coarse and irregular 

 lines of growth, and the shell more or less strikingly convex. In 

 addition to the above points of difference between T. bisidcata 

 and T. haliotidea, and which apply equally well to T. scutulum, 

 I would in further confirmation point out that the figure 

 of the teeth of T. bisukata given by Gassies and 

 Fischer is practically identical with those of T. scutnluvi^ 

 especially in the comparative slenderness of their form and the 

 reduced dimensions of the barbed end. Lovell Reeve, ' Brit. 

 Land and Freshwater MoUusks,' seems to quite misapprehend 

 the characters of T. bisukata, evidently regarding the sulci from 

 which this form received its name, as a peculiarity of the shell. 



T. PECCHiOLii is only known to us by the figure of the sexual 

 organs given by Pollonera in the ' Boll. Mus. Zool. Anat. Corn- 

 par.' vol. iii., pi. ii., fig. i8, and by his remarks thereon, all of 

 which agree completely with T. scutulum. If the arrangement 

 and number of the muscles of the lingual sheath also coincide 

 there can then be no reason for maintaining T. pecchiolii as a 

 species distinct from T. scutulum. It may further be remarked 

 in corroboration of the views here expressed that Tryon (' Man. 

 Conch. Pulm. i., ii, 1884) is of opinion that the form called 

 by the name pecchiolii is very closely allied to bisukata. 



I hope that with the kind and generous help of fellow-con- 

 chologists the full distribution of T. scutulum may be worked 

 out, and the identity or otherwise of T. pecchiolii, T. bisukata, 

 and other forms definitely determined by the new material 

 which I trust our co-workers will exert themselves to procure. 



Helix revelata and Pupa umbilicata var. alba at 

 Newquay. — To the list of shells found by Mr. J. H. James at 

 Newquay, Cornwall, I can add Helix revelata and Pupa utnbili- 

 cata van alba, of each of which I found two examples only. 

 The Helix revelata was among weeds and grass on the cliff, the 

 Pupa among moss in a damp lane. — S. J. Da Costa, May, 1888. 



