| LIMNAA. 379 
Hab. 8. Panama: Bugaba (Champion). 
This variety is very like a Succinea, but it may be distinguished at once from the 
species of that genus by the subhorizontal course of the suture. I have examined 
the radula, to ascertain its true affinities. 
Doubtful Species of Limnea. 
Limneza sordida. 
Limneus sordidus, Kiister, in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Limnaus, p. 58, t. 12. 
figg. 15, 16 (1862)*. 
Of the general form of the European L. peregra, Miill., blackish, fenestrated by conspicuous, irregular, elevated 
lines, vertical and spiral. Length 232, breadth 114, aperture 13 millim. 
Hab. Cuntrat America (coll. Von dem Busch *). 
I cannot help thinking that L. sordida belongs to the North-American form figured 
by Haldeman (Monogr. Limniades, no. 4, t. 6. fig. 1) as LZ. fragilis (L.), and by Binney 
(Land and Freshw. Shells N. Am. ii. p. 47, fig. 65) as L. palustris (Mill.); it is, 
however, quite distinct from the European JZ. palustris, and may be named more 
properly L. elodes, Say. A similar fenestration sometimes occurs in the true 
LI. palustris. ‘There is a shell very like it in Paetel’s collection with the apocryphal 
name J. nigra, and the still more improbable locality “Cap.” Another allied form, 
not fenestrated, corresponding to Haldeman’s tab. 7. fig. 5 (wmbrosa), is contained in 
Dunker’s collection, now in the Berlin Museum, also with the locality “Central 
America.” 
Limnzea macrostoma. 
Limnea macrostoma (Say), Tryon, in Am. Journ. of Conch. ii. p. 11 (1866) *; Fisch. & Crosse, 
Miss. Scient. Mex., Mollusca, ij. p. 52°. 
This well-known N.-American form, which ranges southward to Georgia (see Binney, 
Land and Freshw. Shells N. Am. ii. pp. 33-37), is admitted by Tryon! and Fischer 
and Crosse? among the Mexican species on the authority of Dr. Berendt. But as 
H. Strebel, who was very intimate with Dr. Berendt in Mexico and knew his material 
well, does not mention it in his work on the Mexican Land and Freshwater Shells, I 
hesitate very much to include it in the Mexican list. It is not impossible that a 
Succinea has been mistaken for a Linnea of this sort. 
For Limnea rugosa, Val., see Otostomus dombeyanus, antea, p. 199. 
48* 
