= 56 = 
KBY, 
FOR THE IDENTIFICATION OF ECONOMICALLY IMPORTANT 
SNAILS AND SLUGS 
La. Animal with a visible shell; either 

land or fresh-water anhabibamtiecjcictenenetetere! sole a) eteyaietae ane eoLsis ic bichaieneunlall 
1b. Animal without an external shell; 
Land inhabitant.) cic. )scctaistel =| oie evenotena oo Gobo cunopeomomon JokcaodGs 2 
2a. Mantle covering the entire back of the 
ATEN Aalysie ts «6.6 s)s Sacbdocssaoce Sti onoormt oO On ... Veronicella moreleti 
2b. Mantle covering only an anterior 
portionofthe animals, gem oi. © se PIE 0 OCMC Goo oo apd Bras oS) 
3a. Breathing pore in anterior half of 
right side of mantle; back never 
keeled in adults; posterior end 
rounded when viewed from above... cise s/e)eie)< = «0: « SHodietadelcePaNs) «(eves 
3b. Breathing pore in posterior half of 
right side of mantle; back keeled, 
either at posterior end or entirely; 
posterior end pointed when viewed 
from: abOVEya. occa Qo otemase s eeipeiolteta ts) ef'ere she veebicl ones Beets ev aialshereine 6 
4a. Large, adults more than 70 mm. 
(2-3/4 inches) when extended; sides 
of body without dark longitudinal 
lofbeCks Sis Goma aunc acod or alevst sie) es: ehoiwtenehe Buettelelle’ a. 0) se Sialsisiste/es AtaOneabe rs 
4b. Smaller, adults less than 60 mm. 
(2-3/8 inches) when extended; sides 

of body with dark longitudinal bands....... Meo ca daemodacoadods sae 
5a. Breathing pore below right mantle 
pigment band; mucus clear. cc4. ccc see ce ....-Arion circumscriptus 

5b. Breathing pore in right mantle 
pigment band; mucus yellow or 
Opsicbliosoga shade Gac POCO eg Oe COU O.o co OO cn 6b ot Arion hortensis 
6a. Back strongly keeled; mantle granulate 
but not concentrically wrinkled, its 
central part bounded by ajeroovie cers) + + ce shots .....--Milax gagates 
6b. Back keeled only near the end; mantle 
concentrically wrinkled, without a eroove. .. . </jiceienrerietctsterer ait 
7a. Large, adults more than 50 mm. (2 inches) 
when extended; body usually either banded 
or conspicuously spottedi2y. ...tmmimis oct.» St al eee BiolavewesaWatiobentettolente Aiea 21s) 
wbDe Medium or small, adults less than 38 mm, 
(1-1/2 inches) when extended body not 
banded, and if spotted, either inconspic- 
uously jspotted or mottled ic. ..cpoeys erence eens Slehetpis aie eeisnatet ame selO 
