504 H. A. Pilshry — Air-breathing Molhisks of the Bermudas. 



sors C. B. Adams, Heilprin, and Verrill's party. It is much smaller 

 than P. tnirahiUs, more oval than the young of that species, and 

 never develops a tooth within the outer lip. Recorded by Jones, 



1876. 



Plecotrema cubense Pfr. 



Plate LXII, Figure 11. 



Taken by Heilprin's party in 1888 and by Prof. VerrilPs party 

 in 1898 (No. 12,046). The specimens agree with those from Cuba. 



Alexia myosotis bermudensiB Pfr. 



Scarcely distinct from the European and New England myosotis, 

 but on the average differing in the absence or small size of the upper 

 parietal fold, there being usually but two folds on the columellar 

 side of the mouth, and none within the outer lip. Occasional speci- 

 mens, however, have three folds. Those before me were collected 

 by C. B, Adams, Heilprin's party, Prof. Verrill's party, and others, 

 so that it is apparently an abundant species. Recorded by Jones, 

 1876. 



Our examples were mostly collected on the edges of a small pond, 

 near the Post Office at Bailey's Bay. — (V.) 



Melampus flavus Gmel. 



Taken by Heilprin's party. It is easily known by the very low 

 position and subvertical direction of the columellar fold. 



Melampus redfieldi Pfr. 



Scarcely, if at all, to be distinguished from the prior M. gundlachi 

 Pfr., but not attaining so large a size. It was originally described 

 from the Bermudas, and has been taken there by Robert Swift, 

 Thomas Bland, and the parties conducted by Professors Heilprin 

 and Verrill. 



Melampus gundlaclii Pfr. 



Three specimens, typical of this form, were sent me many years ago 

 by Mr. C. T. Simpson ; and Mr. E. A. Smith identifies it among the 

 'Challenger' shells. It seems to iutergrade in Florida with M. 

 coffea L. Dall, in his revision of the Auriculacea, has mistaken it 

 for M. flavus, which is really quite a distinct thing. 



