LIMNEA SOLIDA. 37 



SYNONYMS AND REFERENCES. 



Z. SOLIDA, LEA. 7 Tr. Am. Phil. Soc., vol. vi. p. 94 and 

 L. APICINA, " 3 102, pi. 23, fig. 91. 



DESCRIPTION. 



SHELL obtusely conical, smooth, and umbili- 

 cated; with four or five convex whirls, separated 

 by a deep suture: apex pointed: aperture polish- 

 ed, subovate, with the fold conspicuous when 

 young, and obsolete in the adult. 



COLOR pale bluish-grey, apex and aperture 

 various shades of reddish-brown: young ochra- 

 ceous. 



GEOGRAPHICAL DISTRIBUTION. Found by Mr. 

 Nuttall near the mouth of Wallamut river, 

 Oregon. 



OBSERVATIONS. 



As Mr. Lea's figures 91 and 94, (the latter 

 purporting to be 'L. apicina,') are too distinct 

 to represent the same shell, it becomes neces- 

 sary to give my reasons for not admitting the 

 latter as a species. These are, the fact that 

 my figures represent but one species: the infor- 

 mation from Mr. Lea that the shells figs. 11 



