100 



It remains to inquire which of the two shells was originally des- 

 cribed by Mulier as H, sinuata. That H. picturata was not the sh(7« 

 is evident from the eharacteristic phrase " brunnea, carina Candida," 

 and from the words below " carina in medio candidissima." 



Midler, referring to Lister t. 98. f. 99, evidently comprehended 

 within the H. sinuata one of those forms in which the two outer teeth 

 are joined at base, with a single exterior pit for both, as in H. valida 

 and H. Bronnii. Consequently not in this reference, any more than 

 in his descriptions referi-ing to Lister t. 98, and to Klein, does Mul- 

 ier appear to have distinguisned H. picturata. 



It remains only to consider the value of the chai-acters, which sep- 

 arate H. picturata from H. sinuata. To the characteristics mention- 

 ed on p. 30, should be added that the carina is never white as in H.' 

 sinuata. Although this group of shells is very perplexing on account 

 of the want of constant characters, the peculiarities of H. picturata 

 are remarkably constant. In a multitude of H. sinuata and many of 

 H. picturata we have never found a passage from the one to the oth- 

 er. The only and a distant approximation to a connecting link is in 

 H. propenuda (p 70). 



The H. picturata without umbilicus, whicli was described (p. 30) 

 as variety a, proves to be the most common form. The beautiful H. 

 formosa Fer. is a kindred but distinct species. "We offer the follow- 

 ing as the synonymy of our shell. 



Helix picturata. 



sinuata Deless. Recueil. pi. 2G. f. 10. 



var. Kust. in Chem. Ed. II. Helix pi. 15. f. 56. 



Chenu. Helix ph 12. f. 10a, 10b, 10c. (exclus. 1847. 



var. .|9 Pfr. Mon. Hel. viv. I. p 305. No. 796. Syn. 



picturata Ad. Cont. Conch, p. 30, 40. Oct. 1849. 



It affords me much pleasure to acknowledge my indebtedness to 

 ray friend Dr. J. C. Jay, for his aid in examining the synonymy of 

 this and other species, and for the use of his very ample library of 

 Conchology, which, with his equally rich and ample collection of 

 shells, constitute a Conchological paradise unequalled in this country. 



