GASTROPODA. 
177 
. P. limophilus (Westerl.), pi. iv. figs. 16-18, Sweden, Norway, and 
Tyrol, P. crosseanus (Bourg.), pi. iv. figs. 19-21, France and 
Tyrol, P. glaher (Jeffr., 1830) = Icevis (Alder, 1830) = regularis 
(Hartm., 1844), pi. iv. fegs. 22-24, P. rridlmi (Westerl.). 
V. Armiger (Hartm.) : crista, L., var. (a) cristatus (Drap.), pi. iv. figs. 
25-27, and var. (b) nautileus (L.) = imhricatus (Drap.), figs. 
28-30. 
VI. Hippeutis (Ag.) : complafiatus (L.) = fontanus (Lightf.), pi. iv. 
figs. 31-33, riparius (Westerl.), figs. 34-36, Sweden. 
Sub-gcnns Scgmentina (Flem.) : P. nitidus (Midi.), P. clcssini 
(Westerl.), pi. ii. figs. 27-30, Sweden and Germany. 
rianorhis spinulosus, sp. n., Clcssin, CB. Ver. Regensb. xxvii. p. 21, 
Walchensee, Bavaria. 
Planorhis (Gyraulus) intermixtus, sp. u., and devians (Porro) var. n. 
euphr aliens, Mousson, J. de Conch, xxii. pp. 45 & 44, Lower Mesopotamia. 
Planorhis hahylianus, sp. n., Letourneux, Cabylie, i. p. 229, Cabylia. ‘ 
Planorhis rueppelli (Dunker), Abyssinia, pmteli, sp. n., and boissii 
(Potiez & Mich.) = alexandrinus (Roth., nec Ehrenb.), Nile, ahyssinicus, 
sp. n., and costulatus (Krauss), Abyssinia, Jickeli, Verb. L. C. Ak. xxxvii. 
pp. 211-219, pi. vii. figs. 17-23. P. cornu (Ehrenb.), two varieties from 
the Nile, p. 218 ; P. eques (Ehrenb.) = cornu, juv., p. 298. 
Planorhis rodriguezensis (Crosse, 1873), Crosse, J. de Conch, xxii. p. 232, 
Rodriguez Island. 
Planorhis compressus (Hutt.), rotiila (Bens.), liyptiocyclus (Bens.), and 
convexiusculus (Hutt.) figured ; Hanley & Theobald, Conch. Ind. pi. xeix. 
Planorhis hermatoides (Orb.) and peregrinus (Orb.), Strobel, Malac. 
Argent, pp. 33 & 35 ; P. pfeifferi [ [j Krauss], sp. n., with var. n. men- 
dozanus, id. 1. c. p. 39, Argentine States. 
Segmentina angusta, Abyssinia, and alexandrina (Ehrenb.), Nile, 
Jickeli, L c. pp. 220 & 221, pi. vii. figs. 24 & 25; the latter, as in 
some American species, has internal teeth in the first whorls and none in 
the last. 
Ancylus radiolatus (Kiist.) var. n. orientalis, Diabekr ; Mousson, J. de 
Conch, xxii. p. 33. 
Ancylus compressus and ahyssinicus, spp. nn., Jickeli, 1. c. pp. 223-226, 
pi. vii. figs. 26 & 27, 28, jaw and radula of the last, pi. iii. figs. 5 & 6, 
Abyssinia. 
Ancylus ceylonicus and verruca (Bens.), Hanley & Theobald, Conch. 
Ind. pi. Ixxxi. figs. 1 & 2. 
Ancylus cqncentricus (Orb.) var. honariensis ; Strobel, Malac. Arg. 
pp. 50 & 51, Buenos Ayres. 
FULMONATA OPERGULATA, 
. Cyclophoridau. 
Cyclotus angulatus, sp. n.. Martens, JB. mal. Ges. i. p. 56, Sooloo 
Islands. C. Jlammulatus (Pfi\) var. from Celebes ; Pfeiffer, Novitat. iv. 
pi. cxxviii. fig. 8. 
1874. [vOL. XT.] N 
