GASTROPODA (pulmonata). MolL 93 
from Southeru Sweden to Northern Clessiu, Mai. Bl. (2) ii. 
pp. 208 - 210 . 
. Planorhis dispar (Westerl.), distinct from contortus (Mull.) ; id. I, c, 
pp. 158-160. 
Planorbis pauluccianus, sp. n. (Caroti, MS.), Mme. Paulucci, Catalogo 
della Sezione Italiana dell’ Esposizione internazionale di Pesca in Berlino, 
1880, p. 191 (German edn., p. 71), Viareggio. 
Planorbis rollandij sp. n., Morlet, J. de Conch, xxviii. p. 355, subfossil 
at Tamerna, Djedida, in the Saharan region of Algeria. 
Planorbis adowensis, sp. n., Boux’guignat, Descr. Biv. Esp. 1879, Abys- 
sinia. 
Planorbis rossiteri (Crosse, 1871) =fabrii (Gass., 1880) ; Crosse, J. de 
Conch, xxviii. p. 142, pi. iv. fig. 4, Loyalty Archipelago, New Caledonia. 
Planorbis. (Tropidiscus) cultratus (Orb.), Mexico, and surnichrasti (Cr. 
& Fisch.), Tehuantepec ; Fischer & Crosse, Moll, de Mexique, pp. 68-70, 
pi. xxxii. fig. 7, & pi. Xxxiii. fig. 6. 
Planorbis (Gyrorbis) orbiculus (Morelet) = haldemani (Dunker), 
Mexico, maya (Morolot), Yucatan and Tehuantepec, retusus (Morelet) 
Yucatan, petenensis (Morelet), Guatemala, and oiruginosus (Morelet), Gua- 
temala ; iid. 1. c. pp. 70-75, pi. xxxii. figs. 8-10, pi. xxxiii. figs. 4 & 5. 
Drepanotrema, ^uhg. n. oi Planorbis. “Anfractus subglobosi, ultimus 
amplectens, apertura anguste lunata.” American, analogous to the 
European P. contortus. P. (Dr.) yzabalensis (Cr. & Fisch., 1879), 
Tabasco and Guatemala. Id. 1. c. pp. 59 & 75, pi. xxxiii. fig. 2. 
Planorbula (Hald.) is genorically distinct on account of tlio internal 
teeth. P. obstructa (Morelet, as Planorbis) = berendti (Tryon), Mexico 
and Yucatan, and dentiens (Morelet), with var. cannarum, Central 
America ; iid. 1. c. pp. 76-80, pi. xxxiii. figs. 7 & 8, & pi. xxxiv. figs. 6 
& 7. 
Ancylus. General anatomical account of the genus; iid. 1. c. p. 33. 
Clessin begins a monograph of this genus in Kiister’s Conch. Cab. 
pt. 299, pp. 11-40. To the subgeuera Ancylastrum (Bourg.), iyigejluvia- 
tilis, and Velletia (Gray), type lacustris, he adds the two following as 
new: — 
Cumingia || ; shell conical, top coiled, aperture oval. A. cumingianuSy 
Australia, p. 14. 
Ilaldemania : shell conical, top slightly eccentric, but not bent back- 
wards, aperture rounded or oval ; type, A. obscurus (Hald.), N. America, 
ibid. 
Ancylus. 39 species described and the majority figured by Clessin, 
1. c. ; the following have not been figured before : — A. textilis (Guppy), 
p. 25, pi. viii. fig. 6. Trinidad ; orbicularis (Held, 1837) = cyclostoma 
(Bourg., 1853) = vitraceus (Morelet, 1845), p. 32, pi. v. fig. 5, France, 
Southern Germany and Portugal ; subcircularis, sp. n., p.. 33, pi. iv. 
fig. 13, Reichenberg in Bohemia ; dybowslcii, sp. n., p. 38, pi. vii. fig. 1, 
Lake Baikal ; ellipticuSy sp. u., p. 39, pi. iii. fig. 12, Boootia and Eubcca ; 
pileolus (Fer.), p. 40, pi. viii. fig. 3, Greece. 
Ancylus modesius, sp. n., Crosse, J. de Conch, xxviii. p. 150, Nossi-b5, 
Madagascar. 
