and agrees reasonably well with the diagnosis, while the au- 

 thenticity of the locality has never been questioned, it seems 

 necessary to write solida in place of bulimoides (hence cubensis 

 becomes a subspecies). Though solida has always been re- 

 garded as doubtfully identifiable on account of the bad figure 

 in Binney, bulimoides has gone the rounds of the recent litera- 

 ture on this genus. 



This change would involve no particular complications 

 but for the fact that within a year a writer unfamiliar with 

 the western Lymnaeas and their ranges has, grossly violating 

 the law of priority, treated solida as a variety of L. apicina, a 

 synonym according to every writer in fifty years, since it dif- 

 fers but slightly in the elevation of the spire, was derived from 

 the same locality, and described in the same series of articles 

 some months later, and identified the latter with a dwarf form 

 of L. auricularia from the Rocky Mountains and Great Lakes. 

 This latter species is not known to occur within several hun- 

 dred miles of the original locality of solida, besides belonging 

 to a different subgenus, Lymnaea s.s. An inspection of the 

 muddy photolithographs of the types of solida and apicina 

 and the specimens identified with them would hardly convince 

 any skeptical conchologist familiar with the group of their 

 specific identity. 



Pacific Coast of North America from Alaska to the upper 

 Missouri drainage arid middle California, where it intergraihs 

 with L. solida cubensis which replaces it farther south. 

 Lymnaea solida cubensis (Pfeiffer). 



Limnaea cubensis Pfeiffer, in Wiegm. Arch., I. 1839, 354; 

 Limnaea techella ITaldeimm. Am. Jour. Conch. Ill, 1867, 194. 

 PI. VI, 4; Limnaea bulimoides cockerelli Pilsbry, Natit. XIX, 

 1906, 30; L. "caperata Say" Berry, Naut. XXI II, 1909, 77; 

 :;i L. cubensis (and vars.) Hannibal, W. Coast Shells, 1910, 308, 

 PI. III. 4; Galba bulimoides cassi F. C. Baker, Mon. Lym., 1911, 

 221, PI. XXXVIII, 9-11. 



In West Coast Shells cubensis was treated as a species but 

 as explained above, its northern variety proves to have been 

 named earlier, hence it must be written L. solida cubensis. 

 Several writers have confused this fine Lymnaea with L. cape- 

 rata. The latter species ranges from Western Alaska, Hudson 

 Bay, and the lower St. Lawrence basin to Minnesota, Illinois. 

 and Pennsylvania but is absent from the Pacific drainage 

 proper or any point in the Gulf states occupied by cubensis. 

 L. caperata may be readily distinguished on comparison by 

 the more elongate shell, rather sub-pupoid spire, and fine epi- 

 dermal fringes encircling the whorls. 



Due to a misunderstanding of its ha hits this Lymnaea has 

 been generally overlooked and consequently records from 

 southern California are few, considering its untold abundance 

 in all the lowland swamps whence it extends up into the moun- 



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