38 JOURNAL OF CONCHOLOGY, VOL. II, NO. 2, APRIL, I904. 



(4) L. truncatula Miiller sp. — "Verm. Hist," II., 1774, p. 130, 

 n. 325 ; LimncEus minutus Drap., "Tabl. Moll," 1801, p. 51 ; Phil., 

 "Moll. Sic," I., 1836, p. 147, and II., 1844, p. 121 (Z. vmiutus). 

 Rather common in numerous colonies in muddy waters (Sebeto, 

 Castellammare). Locality first cited by Philippi (II., p. 121). 



The geographical area of this species is very extensive and geologic- 

 ally it is ancient. The individuals differ much in the various 

 localities.^ 



This LinmcEa is well distinguished by the cutting off of the whorls 

 and by its tetragonal aperture, these are differences from young 

 individuals or varieties of L. palustris. We may give the name of 

 L. minutus, following Draparnaud, to the small varieties with deep 

 suture. 



Var. neapolitana n.f. — Shell smaller and less lofty; ovoid 

 aperture; yellowish color. Not common, in the channels of the 

 Sebeto. 



(5) L. auricularia L. sp.— "Syst Nat.," Ed. X., 1758, vol. I., p. 

 774 {Helix); Costa, O. G., "Catal. test, due Sic," p. cvii., nr. 39, 

 pars {Helix). In small deep waters amongst aquatic plants (Sebeto 

 and Botanical Garden). 



A very variable form living in Europe and Tibet. Philippi says he 

 has never found this species in the Neapolitan region ("Moll. Sic," 

 II., p. 120). 



(6) L. limosa L. sp.— "Syst. Nat," Ed. X., 1758, L, p. 774 

 {Helix); Gmelin, "Syst Nat," Ed. XIII., 1778, p. 3667 {Helix teres); 

 Drap., "Hist Moll.," 1805, p. 50, t ii., f. 30-31 {Limnceus ovatus); 

 Costa, "Catal. Test.," 1829, p. cvii., nr, 41 {H. limosa); Idem, p. cvii., 

 nr. 39 {H. auricularia non. L., pars); Phil, "Moll. Sic," I., p. 146; 

 II., p. 120 (Z. ovatus). In stagnant waters in numerous colonies 

 (Sebeto, Astroni and Sarno). A very variable form ; consequently it 

 is impossible to establish a careful synonymy. 



(7) L. peregra Miill. sp. — "Verm. Hist," II., 1774, p. 130, n. 

 T,2/^{Buccinum); Phil., "Moll. Sic," I., p. 146; II., p. 120; Chemnitz, 

 "Conch. Cab.," IX., t. 135, f. 1244. Common, with its varieties, in 

 running waters and fountains. Longer and less swollen than the 

 preceding species. 



Var. paupercula PoUonera. — "Moll. fluv. viventi. del Piemonte," 

 Boll. Mus. Zool. ed Anat. Camp. R. Univ. Torino, vol. 4, 1889, 

 p. 4. Smaller, brittle and thinner. 



I See Clessin: "Limrieea truncatula," Malakozoologische Blatter, 1879, p. 30, f. ii. 



