64 LAND AND FRESHWATER 
List of recorded Species of Geomalacus. 
G. maculosus, Allman: type. Ireland. 
G. andrewsi, var., Mabille. Ireland. 
G. anguiformis, Morelet. La serra de Morichique, Algarve, 
Portugal. 
G. intermedius, Normand. Valenciennes, France. 
G. bourguignati, Mabille. Forét de Meudon, Paris. 
G. paladilhianus, Mabille. do. do. 
G. moitessierianus, Mabille. do. do. 
These three last, I should conclude, are the same species in dif- 
ferent stages of growth. 
In a paper entitled ‘ Des Limaciens Frangais,” 7. c. (1870), M. 
Mabille records also 
G. mabilli, Baudon, Journ. Conch. vill. p. 142 (April 1868), 
Mouy-de-l’Oise. 
G. vendeianus, Letourneux, Rev. et Mag. Zool. t. xxi. p. 7. 
Bois-Plat, Fontenay-le-Comte (Vendée). 
Key to Genera of Limacidee and Arionide. 
External characters. Genus or Subgenus, 
A, Animal with a complete oval mantle; gene- 
rative aperture near the right tentacle. 
a. With shell rudimentary, internal. 
a’. Jaw smooth, simple, with central pro- 
jection. 
a". Anal aperture close to respiratory ori- 
fice. 
a'', Foot pointed; no mucous pore. 
a‘. Respiratory orifice on the posterior 
right margin of mantle. 
a5, Extremity of foot keeled ......... LTimax. shoe 
; Amalia), Moquin-Tandon; 
aa. Mantle papillate ............... : (Mil Fey a, 
bb. Do, with concentric ridges ... ie oien mY ea 
65. Foot rounded above ............... Limacus. 
b*. Respiratory orifice in middle of 
mantle. 
b. Shell with well-developed spire; foot keeled.. Parmacedla. 
Oo aw TIDDEM 4... sacccs soe scusqpesespecacsesscccete Anadenus. 
b'”. Extremity of foot with mucous gland. 
c4, Respiratory aperture on anterior 
might Mareip § caseaatece pera < seee Geomalacus. 
B. Generative aperture below the respiratory...... Arion. 
ce. Shell rudimentary (calcareous 
particles not united) ......... (Lochea), Moquin-Tandon. 
dd. Shell with slightly united gra- 
NULAGIONS secwccaseenses¥s.cdcres (Prolepis), Moquin-Tandon. 
