42 Moll 
MOLLUSCA. 
Bythinia inflat'a (Hansen) and majcwskii (Parr.), Siberia, lat. 60° and 
56° N. ; Westerlund, Sv. Ak. Haudl. (2) xiv. No. 12, pp. 63-65. 
Bythinia stanleyiy E. Smith, P. Z. S. 1877, p. 7 17, pi. Ixxv. figs. 21 & 22, 
Lake Nyassa ; B. moreletiana, Nevill, J. A. S. B. xlvi. pt. 2, p. 29, Yay- 
laymay : spp. nn. 
Larina (A. Ad.), operculum very thin, concentrically ribbed, radula 
unknown, lives in brackish water. L. cincta^ sp. n., Pooree. Paludina 
granum (Menke) also belongs to this genus. G. Nevill, Gat. moll. Mus. 
Calcutta, pp. 21 & 22. 
Margarya, g. n. Spire produced,' Melania-Mk^Q, composed of scalari- 
form, rapidly increasing whorls, with very distinct suture ; apex obtuse ; 
sculptured with prominent spiral ribs ; rimate (or umbilicate ?) ; margins 
of aperture rounded, not continuous ; animal and operculum unknown. 
M. melanioideSy sp. n., Lake Tali, in Yunnan. Nevill, J. A. S. B. xlvi. 
pt. 2, p. 30. 
Valvatidac. 
Valvata lacustris, sp. n., = V. ohtusa var. (Brot), Clessin, Mai. Bi. 
xxiv. p. 177, Lake of Geneva, in depths of 50 to 100 metres. 
Valvata nitenSy sp. n., and sibirica (Midd., as var. of cristata), Siberia, 
at the Yenissei, lat. 63° and 68° N., Westerlund, Sv. Ak. Handl. (2) xiv. 
No. 12, pp. 62 & 63, pi. i. figs. 15 & 16. 
Valvata japonicay sp. n.. Martens, SB. nat. Fr. 1877, pp. 116, Lake 
Hakone, Japan. 
Valvata ? microscopiay sp. n., G. Nevill, Oat. moll. Mus. Calcutta, p. 21, 
Port Canning. 
Ampullarud.®:. 
Ampullaria globosa (Swains.), with var. B. A. corrugata (Swains.), 
var. 0. A. carinata (Swains.) = malabarica (Phil.) = layardi (Rv.) = 
paludinoides (Phil.), var. D. incrassatula, and var. E. minor, Ois-gangetic 
India, Ceylon, and Assam; A. maura (Rv.), Assam, A. theobaldi 
(Haul.), Bhamo ; A. aperta (Phil.) = saxea (Rv.), Pegu, Akyab, 
Cachar; A. cornea (Gray) = scutata (Mouss.) = compacta (Rv.) = 
orientalis (Phil.), Trans-gangetic India ; A. stoliezkana, sp. n., Pulo 
Pinang ; G. Nevill, Oat. moll. Mus. Calcutta, pp. 1-11. 
Lanistea aolidua and affmia, spp. nn., and nyaaaanua (Dohrn), Lake 
Nyassa, E. Smith, P. Z. S. 1877, pp. 715 & 716, pi. Ixxiv. figs. 7-11. 
V BRMETIDiE. 
Vermetus cristatus (Biondi, 1859) = ? granulatua (Forbes), Algiers ; 
Monterosato, J. do Conch, xxv. p. 36. 
Vermetus varians (Orb.), electrinus (Morch), and conicus (Dillw.). On 
their synonyms and varieties; Morch, Mai. Bl. xxiv. pp. 116-121, West 
Indies. 
Sqdioniiun nebulosum (Dillw.). Synonyms and varieties ; Morch, 
Mai. Bl. xxiv. pp. 112-114, West Indies, 
