Il6 LAUD AND FRESH WATER MOLLUSKS 



So it is uncertain whether the range herein reported might not be con- 

 siderably extended if thorough collecting had been done. 



Carychium exiguum Say. 



Pupa exigua Say, Journ. Acad. Nat. Sci. Phila., n, p. 375, 1822. — Gould, 

 Boston Journ. Nat. Hist., Ill, p. 398, pi. Ill, fig. 20, 1841. 



Carychium exiguum Pfeiffer, Wiegman's Archiv, 1, p. 224, 1841. — BlN- 

 NEY, Land and Fw. Sh. N. Am., 11, p. 6, figs. 5-9, 1865. 



Range. — Temperate North America. 



At Brandon, Pine Creek, and Carberry, Manitoba; Salt Spring 

 Island, and at Comox, Vancouver Island, British Columbia. 



Carychium exile Lea. 



Carychium exile H. C. Lea, Am. Journ. Sci., 1st ser., xlii, p. 109, pi. 1, 

 fig. 5, 1841. — Troschel, Arch, fur Naturg., 11, p. 128, 1843. Not C ' 

 exile C. B. Adams, Contr. Conch., ill, p. 38, 1849 (Jamaica). 



Range. — Eastern United States. Manitoba, in drift of the Red 

 River of the North. 



In the description of the animal of Carychium cited by Binney 

 (under C. exiguum) and copied by Baker (Moll. Chicago Area, 11, p. 

 254) the writer has confused the anterior end of the wide muzzle with 

 the foot, although, by the figure adjacent to this paragraph, the rela- 

 tion of the parts is clearly shown. The foot of the animal is not 

 " divided into two segments," but is entire, as required by the generic 

 diagnosis. 



Family STREPOMATID^. 

 Genus Pleurocera Rafinesque. 

 * Pleurocera canaliculata Say. 



Melania canaliculata Say, Journ. Acad. Nat. Sci. Phila., 11, p. 175, 1821. 



Ohio. 

 Melania conica Say, op. cit., p. 176, 1821. — Sowerby, in Richardson, Fauna 



Boreali Am., ill, p. 316, 1836. 



Range. — Ohio, Tennessee and Alabama, Indiana and Illinois. 



This species is cited in J. de C. Sowerby's very inaccurate list, as 



coming from " Lake Superior to the Saskatchewan." No subsequent 



collector has confirmed this statement, which is doubtless entirely 



erroneous. 



Genus Goniobasis Lea. 



Goniobasis plicifera Lea, var. silicula Gould. 



Melania plicifera Lea, Trans. Am. Phil. Soc, VI, p. 93, pi. xxill, fig. 90, 



1836. Oregon. 

 Melania silicula Gould, Proc. Bost. Soc. Nat. Hist., II, p. 224, 1847 ; Wilkes' 



Exped., Moll., p. 141, figs. 164, 164a, 1852. Nisqually, Oregon. 



