42 JOURNAL OF CONCHOLOGY, VOL. II, NO. 2, APRIL, I9O4. 



Var. cornea Locard. — "Etudes sur les variat., etc.," 1881, p, 

 367. Pale yellowish in color and translucent. Very common. 



Var. cinerea Locard. — "Etudes sur les variat., etc.," 1881, p. 367. 

 Grayish in color, translucent, often incrusted. Common. 



(17) B. boissieri Charp. in Kiister — "Die Gattung. Paludina,'" 

 p. 35, t. vii., f. 30, 32; 1852. Not common, in stagnant waters. 

 The type lives near Rome. 



Var. curta Paulucci. — In Caroti, "App. sulle Paludinacee ita- 

 liane," Boll. Soc. Malacol. Ital., 1883, vol. ix. Last whorl of the shell 

 more swollen than in the type; it is allied to B. leachi var. italica 

 Paulucci. 



(18) B. rubens Menke sp. — "Synops. method, mollusc," 1830, 

 p. 134 {Paludina); Phil., "Moll. Sic," L, p. 148, IL, p. 122. 

 Originally cited as living in the Lake of Patria (Philippi and Kiister), 

 it is found common in the channels of the Sebeto and in the fountains 

 in the Botanical Garden. 



This species differs from B. tejitaculata by its smallness, ovoid form, 

 translucidity, reddish color and white operculum. It is the southern 

 representative of B. leachi Shepp. var. troscheli^'mgvix., which does not 

 live in Italy. The swollen varieties pass into B. orsinii Charp. in 

 Kiist, distinguished by last whorl being swollen and elongated. The 

 type of Menke lives in Sicily. 



VALVATIDiE. 



(19) Valvata piscinalis MiiUer sp. — "Verm. Hist.," II. , p. 172, 

 nr. 358 [Nerita); Drap,, "Tabl,," 1801, p. 39 {Cydostoma obtusum); 

 Phil., I., p. 147, II. , p. 121. In clear and limpid waters; not 

 common. 



Var. parthenopasa n.f. — More elongated ovoid aperture; cham- 

 ferings less deep; reddish yellow color with horny lustre. In the 

 channels of the Sebeto. 



Neritid^. 



(20) Neritina fluviatilis L. sp.— "Syst. Nat.," Ed. X., 1758, L, 

 p. 777 {Nerit'.i) ; Costa, "Catal. test.," p. cviii., nr. 45 {Neritd). In 

 the river Sarno upon submerged stones in shallow water. 



PELECYPODA. 

 TETRABRANCHIA. 



Unionid/e. 



(21) Unio requieni Mich. — "Compl. hist, moll.," 1831, p. 106, 

 tal. xvi., f. 24. In the river Sarno. A very variable form allied 

 principally to U. pidoruni, the separation being only possible in the 



