66 MolL 
MOLLUSCA. 
late sinuata ; labrum breviter incrassatum, in medio late sinuatum, 
interne aliquanto productum, longe intus liris 1-2 prominulis munituin ; 
columella incrassata, plica valida superne instructa, labri extremitati callo 
tereti juncta.” S. lacustris, sp. n. (11^ millim.), Lake Tanganyika. E. A. 
Smith, Ann. N. H. (5) vi. p. 426. 
Melanopsis. The very variable Moroccan forms of this genus are dis- 
tinguished by Morelet as follows; prcerosa (L.), hammonensis (Gassies) = 
maroccana (Chemnitz, pt., Morelet, 1853, Bourg., Mouss.), cariosa (L.), 
costata (Olivier), tingitana (Morelet), and maresi (Bourg ) ; he admits the 
occurrence of specimens which are intermediate between these species, 
but thinks that they may be hybrids. J. de Conch, xxviii. pp. 68-78 ; 
prcerosa and tingitana^ pi. iii. figs. 6 & 8. 
LimnotrochuSf g. n. Trochiform, umbilicate, spirally striated, without 
epidermis, last whorl carinated in the middle ; aperture broadly sinuated 
below ; operculum horny, paucispiral. L. thomsoni and kirki, spp. nn., 
Lake Tanganyika. E. A. Smith, Ann. N. H. (5) vi. pp. 425 & 426. 
Faludomus (Swains.) s. stricto ; operculum in the centre spiral, peri- 
pherically concentrical, nearly as in Lioplax and Cleopatra among the 
Paludinidce. 28 species described and figured by Brot, in Kiister’s 
Conch. Cab. pt. 293, pp. 24-48, pis. vi.-viii. P. constrictus and phasia- 
ninus (Reeve), zeylanica (Lea), fulguratus, piriformis (Dohrn)^ a,ud parvus 
(Layard) are all varieties of chilinoides (Reeve), p. 28 ; rapiformis, sp. n., 
p. 30, pi. V. fig. 10, locality unknown; isseli, sp. n., p. 31, pi. vii. figs. 7 
& 8, Sarawak ; andersonianus, var. n. peguensis, p. 36, pi. vii. figs. 2 & 3, 
= regulatus, var., Hanley & Theob., Conch. lud. p. 108, fig. 6 ; acutus, 
spiralis (Reeve), modicella(ReeYe), lutosa (Souleyet), (Dohrn), and 
spurcus (H. & A. Ad.), are all varieties of tanjoriensis (Blanf.) = tans- 
chaurica (Gmel.), p. 41, pi. viii. figs. 18 & 20-23; infatus, sp. n., p. 44, 
pi. viii. figs. 25 & 26 ; baccula (Reeve) = ajanensis (Morelet) ; mada- 
gascariensis, sp. n., p. 48, pi. viii. fig. 7, Madagascar. 
Faludomus travancorica (Beddome, MS.), sp. n., Blanf ord, J. A. S. B. 
xlix. pt. 2, p. 219, pi. ii. fig. 22, Trevandrum, S. India. 
Tanalia : operculum concentrical, 7 species described and figured, all 
from Ceylon, undata, layardi, erinaceus^ cerea, funiculata, picta (all 
of Reeve), nodulosa, skinneri^ distinguenda, torrenticola (all of Dohrn), 
reevii and similis (Layard), are varieties of loricata (Rv.) ; gardneri, ten- 
nantij dilatata (Reeve), cumingiana, dromedarius (Dohrn), and melano- 
stoma (Thorpe), are varieties of neritokles (Reeve). Brot, in Kuster’s 
Conch. Cab. pt. 293, pp. 1-14, pis. i.-iv. 
Philopotamus (Layard) ; chiefly distinct by the spiral structure of the 
operculum, which is, however, more or less conspicuous in different species. 
9 known species described and figured, by Brot, in Kuster’s Conch. Cab. 
pt. 293, pp. 15-23, pis. ii. v. & vi.. Southern India and Ceylon. 
Stomatodon (Benson), g. n. “ Testa giobosa-turrita, spira parvula, 
brevi, in adultis erosa, columella lata, callosa, basi intus subito truncata 
et conspicue dentata. Operculum lamellosum, nucleo marginali dextrorse, 
ad mediam altitudinis partem posito.” S. hensoni^ = Tanalia ? stoma- 
todon (Benson, 1862), already suspected by Benson to be a new genus. 
Brot, in Kuster’s Conch. Cab. pt. 293, p. 12, pi. v. fig. 2, Southern India. 
