MOLLUSCA. 463 
well as their lingual dentition. Gotlands niitida mollusker, pp. 20-28, pi. 
figs. 0-10, and pi. 3. fig. 1. 
Bithinia tcntaculata (L.). Lingual membrane by Hogg, Transact. Roy, 
Microscop. Soc. xvi. pi. 8. fig. 2. 
Bithynia thermalis {\j.')=^saviana (Issel) figured by Gentiluomo, Bullett. 
IMalacol. Ital. i. pi. 1. figs. 4-6 ; B. etrusca (Paladilhe) described, ibid. p. 96 ; 
B. isselit, sp. n., Gentiluomo, ibid. p. 96, pi. 6. fig. 8, Baths of Lucca. 
Valvatida?. 
Valvnta cristata (Miill.). Lingual membrane and mandible or buccal plate 
by Hogg, Transact. Roy. Microscop. Soc. xvi. pi. 8. figs. 9 & 10. 
AMPULLARIIDyE. 
Ampullaria urcens (Miill.) and effvsa ? (Miill.). Lingual dentition, by Hogg, 
Transact. Roy. Microscop. Soc. xvi. pi. 9. figs. 23 & 24 [subgenera Pomus 
(Ikumphr.) and Marisa (Gray)]. 
Ampvllaria ovata, var., in the river Niger, Morelet, Moll. terr. et fiuv, Voy. 
Welwitsch, p. 94, pi. 0. fig. 10. [Probably A. wernei, Phil.] 
\^Lamstes~\ Ampullaria ovum (Peters) in several lakes of Angola, variable in 
form. Morelet, l.c. p. 96. 
Turritellid^. 
Turritclla communis (Risso)=fere6m of former authors, not Linn6, = corwca 
of Kiener, but not of Lamarck. Weinkauff, Conch, d. Mittelm. ii. pp. 318- 
321. 
Turritclla lactea (lSio\\ev) — retim(lata (Mighels). Operculum with nine 
narrow circumvolutions ; cannot be referred to Mesalia. Morch, Am. Jourii. 
Conch, iv. p. 46. 
Mesalia brcvialis (Lam.) has a corneous, deeply concave operculum with 
very broad circumvolutions. Morch, ibid. p. 46. 
Mesalia brevialis (Lam.), Gibraltar and Algesiras, and M. subdecussata 
(Cantraine as Scalaria)— striata (M'Andr.), probably also Turritclla can- 
cellata (Risso), Spain and Sardinia. Weinkauff, 1. c. pp. 322, 323. 
CiECIDiE. 
Ccecum gracile, vitreum, dextroversum^ clarkii, ? 7namiUatum, Brochina gla- 
briformis and glabella, found in Japan. A. Adams, Ann. & Mag. Nat. Plist. ii. 
pp. 364, 365. 
Vermetida;. 
Vermctus. On the Mediterranean species and their synonymy see Wein- 
kauff, Conchyl. d. Mettelm. pp. 325-328. 
Calyptrasida;. 
Cahjptrcva sinensis (L.). Lingual dentition by Hogg. Transact. Roy. Mi- 
rroscop. Soc. xvi. pi. 13. fig. 73. 
Calyptreea sacchari-meta (Reeve) is the young state of cicatricosa (Reeve), 
Pease, Am. Journ. Conch, iv. p. 128. 
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