GASTROPODA (pECTINIBRANCHIA) . Moll. 41 
Sea, at considerable depths ( Grimm, Kasp. more fauna, ii. pp. 79-81 
(radula of the two latter, pi. vii. figs. 6 & 7). 
Paludestrina duperrciy sp. n., V(51ain, Arch. Z. exp6r. vi. p. 115, pi. iii. 
figs. 18 & 19, St. Paul Island. 
Hydrohia piimila^ sp. n., and caliginosa (Gould, as Littorind) ; E. Smith, 
Transit Venus Exp. Moll, p. 7, pi. ix. figs. 7 & 8, Kerguelen \_anted^ p. 6]. 
Bythinella columna^ sp. n., Clessin, JB. mal. Ges. iv. p. 355, Karfreit, 
Austrian coast. 
Paludinella gilesi, sp. n., Angas, P. Z. S. 1877, p. 170, pi. xxvi. fig. 2, 
shores of Lake Eyre, Southern Australia. 
Benedictia (Dybowski, 1875) has some points of resemblance to Lio^ 
placodes (Meek, 18G4) ; W. Dali, P. Bost. Soc. xix. [1876] p. 44. 
7'ryonia (Stimps.). Dali, 1. c. pp. 45 & 46, expatiates on the systematic 
value of the genera and subgenera proposed by Dybowski for species 
frorh Lake Baikal [Zool, Rec. xiii. Moll. p. 31] ; he thinks that they are 
to be united with the genus Tryonia, and proposes for some of them the 
following subgenera : — 
Baikalia (Martens, emend.), margin of the aperture notched ante- 
riorly in the adult : Ligea carinata (Dybowski). 
Liohaikalia (Martens, emend.), whorls loosely coiled : Leucosia 
stiedee (Dybowski). 
Dybowskia, subg. n. ; whorls transversely ribbed with a ciliate epi- 
dermis, deep suture, short and rapidly tapering spire, and sub- 
circular aperture : Ligea ciliata (Dybowski) and L. duihiersi 
(Dyb.), if distinct. 
LithoglypTius caspius (Krynicki), living in the Caspian Sea, in depths 
from 106 to 280 feet ; Grimm, I, c. ii. p. 82 (radula, pi. ix. fig. 8). 
Paludinid.®. 
Paludina. The European species discussed, P. mamillata (Kiist.), 
atra (Cristof. and Jan.), costce (Heldreich), and okaensis (Clessin), being 
regarded as distinct species ; Kobelt, Iconogr. v. pp. 73-76, pis. 
cxxxviii.-cxl. figs. 1379-1382. 
Paludina cTiinensis (Gray) = lecythoides (Bens.), with var. P. ampulli- 
formis (Souleyet), from Burmah and Yunnan, and var. P. lecythis (Bens.), 
from Sylhet ; P. ' bengalensis (Lam.), with the varr. P. gigantea (Rv.), 
doliaris (Gould), poly gramma (Martens), cingulata (Martens) = cochin- 
chinensis (Morelet) = ohscurata (Desh.) = ingallsiana (Reeve, nee Lea) 
== frauenfeldi (Morelet) ; naticoides (Theob.) = shanensis (Theob.) ; 
crassa (Hutt.), with new var. tezpurensis ; dissimilis (Mull.) = remossi 
(Phil.) = prcc7norsa (Reeve), with the- varr. (Troschel), variata 
(Frauenf.) = carinata (Rv., nec Swains.), ceylonica (Dohrn), heliciformis 
(Frauenf.), viridis (Rv.), and decussatula (Blanf.), all from British 
India : G. Nevill, Cat. moll. Mus. Calcutta, i. pp. 24-41. 
Paludina jeffi'eysi, capillata, and robertsoni (Frauenfeld), from Lake 
Nyassa ; E. Smith, P. Z. S. 1877, pp. 716 & 717, pi. Ixxiv. figs. 1-6. 
Tylotoma. Various notes concerning this genus ; Wetherby, Q. J. 
Conch. No. 11, pp. 207-215. 
