68 Moll . 
MOLLUSCA. 
• Aulacognatha. 
Avion. Critical note on some species; Heynemann, Nachr. raal. Ces. 
1882, p. 127. 
Avion subfuscus , var. n. albus ; B. Esmark, N. Mag. Naturv. xxvii. 
p. 98, Osterdalen, in Central Norway, at a height of 2300 feet. 
Avion fallax , sp. n., Sterki, Nachr. mal. Ges. 1882, pp. 150-153, 
Switzerland. 
Avion pegovavii ) sp. n., Lessona & Pollonera, Mem. Acc. Tor. (2) xxxv. 
Italy. 
Avion dupuyanus (Bourg.) and Geomalacus bayani (Jouss.), = A. 
bouvyuignati (Mabille), juv. ; id. ibid. 
Avion incommodus (Ilutt.) = fuscus (Mull.), jaw and radula figured ; 
Hutton, Tr. N. Z. Inst. xiv. p. 154, pi. iii. figs. K & R. 
Aviunculus isseli (Bourg., MS.), sp. n., Lessona & Pollonera, l. c. 
Italy. 
Letouvneuxia (Bourg.), not sufficiently distinct from Avion ; Hoy- 
nemann, Nachr. mal. Ges. 1882, pp. 129 & 130. 
Anadenus (Heyuem., 1863), altivagus (Theob.) = giganteus (Heynem.), 
anatomical description, jevdoni, Kashmir, and blanfovdi , Darjiling, 
spp. nn., God win- Austen, l. c. pp. 46-54, pis. vii. & viii. 
Geomalacus maculosus (Allman), anatomically described ; id. 1. c. 
pp. 60-63, pi. xii. figs. 1-8. 
Aviolimax columbianus (Gould), var. n. heavoxi ; Wetherby, J. Cincinn. 
Soc. iv. [Oct. 1881], California. 
Helix. P. Fischer in his Manual de Conchyliogie, fasc. 5, pp. 470-472, 
adopts 16 subgenera in this genus, subordinating many others, more or 
less reasonably, to them. 
Helix • European and Nortli African species : — 
Helix (Patula) jaenensis, sp. n., Clessin, Mal. Bl. (2) v. p. 187, pi. iv. 
fig. 3, Jaen, Andalusia. “ Perhaps a variety of H. vupestvis .” 
Helix ( Gonostoma ) supva-costata, sp. n., Kobelt, Nachr. mal. Ges. 
1882, p. 123, Tetuan. 
[ Fvuticicola ] Helix mosellica , aubiniana , limonia, dumovum , vellavorum ) 
lepidophova , buxetovum t nemetana, vusinica (all Bourguignat, 1878), 
venetovum and villula (Bourg., 1880), sepavica, cussetensis, ceyssoni , indola, 
langsdovffi, cotinophila , vepvium , silanica , odeca , hylonomia, sublimbata, 
innoxia, leptomphala , subbadiella, vendopevanensis, vocoutiana , chononiphala 
and micvogyva (all Bourg., MS.), spp. nn., dubisiana (Coutagne, MS.), 
hypsellina (Hauterive, MS.), and isavica , spp. nn., Locard, Cat. Moll. 
Fr. pp. 337-319, France. 
Helix avavica } sp. n., Locard, Ann. Ac. Macon (2) iv. 1882, also J. de 
Conch, xxx. p. 252, Banks of the Saone, near Macon, allied to II. plebeia } 
(Dr.) 
Helix cantiana (Mont.) var. n. almonis , Statuti, Bull. Soc. mal. Ital. 
viii. pp. 31 & 32, vineyards near Rome. 
Helix CTvichia) Corsica (Shufctl.) and perlevis (Shuttl.), both from 
