320 'OURNAL OF CONCHOLOGY, VOL. II, NO. 10, APRIL, I906. 



claiming to be an authority on these minute animals I am of the 

 opinion that Jeffreys' Richmond specimen belongs to the species of 

 Studer and not that of Rossmassler." 



Jammia triplicata is conspicuously narrower and shorter than any 

 of the forms of y. muscorum. The length of continental specimens 

 ranges from 2*5 to 3 mm. My Brandon examples measure just 3 mm. 

 The apex of the shell is proportionately more conical. The mouth 

 is furnished with three teeth in the type form; the tooth on the base 

 of the penultimate whorl having the form, when viewed from below, of 

 a short ridge, instead of being a minute rounded elevation, as in F. 

 muscorum and P. bigranata. 



For the present, therefore, it seems necessary to eliminate Jaminia 

 muscorum var. bigranata from the British list. 



In conclusion I must offer my hearty thanks to Dr. Dall and Messrs, 

 B. B. Woodward, E. A. Smith and J. W. Taylor for the kind assistance 

 they have so courteously given me. 



B I BL I O GRAPH Y. 



(limited to works received by the society's librarian). 



The Nautilus, vol. 19, nos. 6-10, Oct., 1905-February, 1906. 



" Description o. a New Species of Goniobasis [C. cohcmbieitsis] from British 

 Columbia," by J. F. Whiteaves. " Notes on the Pleistocene Fossil Shells of 

 Posey County, Indiana," by L. E. Daniels. " Notes on MoeUendorffi.a and 

 Stegodera^'' {dxv'xAt.'X into subgenera, AI. {Tn'helix) hiraseana n.sp. , Formosa], by 

 H. A. Pilsbry. " A New Subspecies of Polygyra fenissi {P. j. seriaa), by J. H. 

 Ferriss. " The Snails of New Mexico and Arizona," by T. D. A. Cockerell 

 [Review of Pilsbry 's work]. 



" Descriptions of Two New Forms of Polygyni' [P. smitht, P. iiiflecta approxi- 

 mans], by Geo. H. Clapp, " On Cypreeidfe " [several nn.varr.], by S. Rous, 

 "Shell Collecting on the Mosquito Coast of Nicaragua, V.," by W. H. Fluck. 

 " New Varieties of North American Pisidia" by V. Sterki. " Massachusetts 

 Slugs," by T. D. A. Cockerell. 



" Some notes on living Strombus pugilis" [use oi operculum in progression and 

 organs of sense], by H. S. Colton. " A New Chiton \_Tonicella blaneyi\ from 

 New England," by W. H. Dall. " A New Brackish-water Snail {Paludestrina 

 salsa'] from New England," by H. A. Pilsbry. " Carychium nannodes n.sp.," 

 [Huntsville, Ala.], by Geo. H. Clapp. " Is Cochlicopa rowelli a Californian 

 Shell?" by H. A. Pilsbry [further evidence desired]. '■'• Achat ina gracilior 

 Boettger \_ = A. papy7-acea var. addinae Pilsbry] ; ^' Pkysa rJiomboidea" by T. D. A. 

 Cockerell [name praeocc, hunierosa suggested]. "November Snails," by V. 

 Sterki [half-a-dozen spp. recorded], 



"New and Little-Known Species of AmnicolidK," by Bryant Walker 

 {^Somatogyrtis siibsiriaUis, S. humerosus, S. quadratns, S. strengi, S. biangulatus, 

 S. excavattis, nn.spp. , Florence, Ala.]. "A New Tertiary Pianorbis" \_P. flons- 

 santensis, Colorado], by T. D. A. Cockerell. "An Ordovician Gastropod re- 



