144 Quarterly Journal of Conchology. 



Macrocyclis Baudoni, Petit. The jaw and dentition place this 

 species in Macrocyclis. 



Macrocyclis concolor, Fer. Probably synonymous with the last. 

 They are placed by Von Martens in Mbrchia, (subgenus of 

 Hyalina). Shuttleworth avers that M. concolor is viviparous. 

 Mac?'ocyclis is essentially an American genus, four species 

 being found on the Pacific slope of North America and one 

 on the Eastern slope. M. concolor is from Puerto Rico, M. 

 Baudoni from Guadaloupe and Dominica, M. euspira from 

 Venezuela and H. paucispira, Poey, which Mr. Bland thinks 

 will prove to be a Macrocyclis, is from Cuba. 



Zonites Lansingii, Bland. Astoria, Oregon. Its upper aspect is very 

 like Zonites multidentatus. This species is the only mollusk 

 known with zonitiform shell and aculeate marginal teeth and 

 having a decidedly ribbed jaw. It cannot satisfactorily be 

 referred to any described genus. It is dedicated to Mr. A. 

 Ten Eyck Lansing of Burlington, N.J., and was discovered by 

 the indefatigable Mr. H. Hemphill of Oakland. 



Zonites Stearnsii? Bland. Among specimens sent by Mr. Stearns 

 for examination is a single specimen of a shell from Astoria, 

 Oregon, allied to Z. Lansingii. It is larger, more elevated, 

 and more distinctly striated, has seven whorls, with a wider 

 and rounder aperture, and is deficient of lamella within the 

 outer margin of the peristome. Having only a single speci- 

 men Mr. Bland delays a formal description. 



Zonites indentatus, Say. Pfeiffer gives St. Domingo as an habitat of 

 this species. Dr. Cleve found specimens in Puerto Rico, 

 which, except being darker colored, are scarcely distinguishable 

 from American specimens. 



Hyalina Bcrmudensis, Pfr. The dentition of this species places it 

 according to the observations of Bland and Binney amongst 

 Vitrinea, and not amongst the Helicacea as in Von Martens 

 arrangement. 



Mr. Bland proposes the name of Hyalina Nelsoni for a subfossil 



form found in caverns at Tucker's Town, Bermuda, in ho- 



# nor of Lieut. Nelson, author of valuable Geological Memoirs 



