THE NAUTILUS. 107 



the courtesy of my friend, Dr. W. H. Ball, for the following descrip- 

 tion from the National Museum examples: 



Shell of an oval form, considerab y flattened and with about two and 

 a half whorls ; color, dark brick red, with occasional mottlings of pale 

 bluish green ; holes, four in the young to six in the adult, ; sculpture, 

 of fine, somewhat irregular spiral threads, crossed by fine, close, slightly 

 elevated, sharp, concentric lamellae, and a few small obscure wavelets 

 which radiate obliquely from the apex ; nacre rather pale, with pink 

 and pale green reflections, but much less deep in color than the typ- 

 ical fulyens Lon., 100 ; lat., li ; alt., 17 mm. 



This variety differs from the type in its more elongate and flattened 

 form, its constantly finer, spiral threading and its paler nacre. The 

 concentric lamellation is sometimes undeveloped on the young shells. 

 It has the same number of holes as the type. 



This varietal form may be regarded as the extreme northerly expres- 

 sion of//. fu/(/ois ; the latter, if my memory is not at fault, has not 

 heretofore been credited to any part of the coast north of Point Con- 

 cepcion ; from that point to Griialalla is an immense jump, about 320 

 nautical miles. 



GENERAL NOTES. 



A NK\V (TENUS OP HELICES. Upon dissecting specimens of Pli/- 

 V//>'" mitn'hi/ssfi Dall. recently. Prof. Cockerell noticed several important 

 points of divergence in the genitalia as compared with what has been 

 been observed in Poly<itjrn., and sent fresh material to Prof. Pilsbry, 

 statin"- that a new group seemed to be indicated, and requesting fur- 

 ther examination This resulted in the confirmation of the features 

 first noticed and the discovery of others, indicating a new generic 

 group, which may be called Axhmu.nella, in honor of Rev. E. H 

 Ashniun. whose researches in New Mexico and Arizona have added 

 materially to our knowledge of the mollusk fauna of those regions. 

 The type is P. miorhyxsa Dall An illustrated account of Anhmun- 

 rlla will appear in the Proceedings of the Academy of Natural Sci- 

 ences of Philadelphia. H. A. P. & T. D. A. C. 



MKLAMPUS FLORIDANUS SHUTTL. In August, 1894, I collected 

 some MrlainpUK on Chambers' farm, Queen Anne county, opposite 

 Chestertown, Md. They were put in the collection of the Academy 

 under the name, M. iincat.iis Say, but on examination they prove to be 

 M. fli>rida.nnx, Shuttl. May not other collections have this Floridian 

 spccios from northern localities? E. G-. VANATTA.V 



/ 

 lit 



