HELIX. 967 



Suecica that H. limosa has five whirls, but the number is 

 omitted in the Systema Naturae, and this shell agrees in 

 other respects with the description, as well as with the re- 

 ference to Gualter. 



TRUNCATULA. 176. Shell ovate-oblong, with the 

 whirls detruncated, and the aperture ovate. 



Helix truncatula. Gmelin, p. 3659. 



Buccinum truncatulum. Muller Verm.n. ^.\S0. SchroC' 

 ter Fhiss. p. 318. t.7. f. 13. 



Bulimus truncatus. Bruguiere Enc. Meth. p. 310. 

 Inhabits stagnant waters about Thangelstadt, in Saxony. 



Schroeter. 

 Shell five lines long and three broad, thin, pellucid, and of a 



dark brown or blackish transparent colour ; it has five whirls, 



which are truncated above ; the aperture is ovate, and the 



inner lip spread on the pillar ; the colour is dirty white. 



INFLATA. 177. Shell ovate-oblong, thickish, opake, 

 ventricose, with a short spire, and the aper- 

 ture large and marginated. 



Helix inflata. Gmelin, p. 3666. 



Hehx, No. 248. Schroeter Einl. ii. p. 247. 



Buccinum prima spira ventricosa, mucrone brevi. Schroeter 

 Fluss. p.Sll. t. 7. f. 5. 

 Inhabits the river Unstrut, in Saxony. Schroeter. 

 This shell appears to be nearly allied to the before-mentioned 



variety of H.putris, but has the aperture less expanded ; and 



in this respect it also differs from H. lutea, to which it bears 



some resemblance; it is white, rather strong, and has the 



body- whirl twice as large as the spire. 



OPACA. 178. Shell ovate, acuminated, thickish, 

 opake, and of a dirty white colour ; aperture 

 ovate-oblong. 



Helix opaca. Gmelin, p. 3667. 

 Helix, No, 257. Schroeter Einl. ii. p. 249- 

 Buccinum album, opacum, ore angustiore. Schroeter Fluss. 

 t.7. f. 17. 

 Inhabits fresh water about Hamburg. Schroeter. 

 Shell nearly half an inch long, and about half as broad, thickish, 

 tolerably strong, opake, and of a dirty white colour ; it has 

 five whirls, of which the body-whirl is larger than the spire. 

 2c 2 



