55a. 
55D. 
56a, 
56b. 
57a. 
57D. 
58a. 
58b. 
592. 
59b, 
60a, 
60b. 
6la. 
61b. 
62a. 
62b. 
63a. 
63b. 
64a, 
64b, 
Ale 
Shell large, adults up to 65 x 20 
m,. (2-1/2 x 3/4 inches); land 
a a ee a ree Lc ais) lise! cy cn elous (eh el@le @ wianevere awe ole ad.es eens @ 0 0's 56 
Shell medium to small, adults less 
than 25 x 6 mm, (1 x 1/4 inches); 
eee ee AC Tet tate ole chelaieieic’s sis els ie) alleleis,sie eles ©, «sie ote) sais) sie’ > 58 
Aperture narrow, its width 
femsttwan 1 /Zests lengths 5 2 oc.s,cicic cts es «516 die shes 00:8 Euglandina striata 
Aperture more oval, its width 
LBP EGR S GSS Ue SS Sa SAS oe 5 doo aon Coo eon donor ane 
Lip of adult purple, reflected; 
eommmella mOr £ruNnC ates 5. c)0's sc 0% 5 96, 02 0.0 0 8 650 Porphyrobaphe iostoma 
Lip of adult neither purple nor 
BeteGle ds COMUIGE |) ALETMPC ALE 6.ci6 es) 50% a's # ollie cine ee Achatina fulica 


Whorls either with color bands or 
marked with alternating transverse 
pad owANG tt ATts IGS Tes DANG Sia a wis iin sa,cfe 2)2)se (0) 6.910 .,9 6,012 » 2 Sie she 0 9 5 0° 3S) 
Whorls without color bands and 
alternating opaque and translucent 
EEC 5 oe Sei BEA Me Aras A es cere olareree OI OOOO DOH onc 61 
Spire whorls rounded; shell 
relatively wider, width more than 
apr Rd OTN oe oc Mees feria) gh aniaiioy eis) o\ic) «oie 2 (S:cvet'e ed Aen SOG G Ce crd Dike 60 
Spire whorls flattened; shell 
narrower, width less than 1/2 
PATO EERE ate ata: ca) ce <.aj'cvete see oe. s-a..6 0:6 .8ya feyexe Diaiiatens’ © 6 Cochlicella barbara 
Shell almost as wide as ee 
aperture. TOUNGLY LINAC) J. sis «0 36,080 &6.0, on0 Sera, oo Cochlicella conoidea 
Shell distinctly higher than wide; 
ABE TLURC TOM ALC =AILIVACE 51,6) cls, bunvavaley> suey: 86 20.000 6. 0.6 Cochlicella ventrosa 
Shell sinistral (wound to One iene 
RE ENR AE OE ENS rea a igh a onlay eilacle alia a" Givas abiageite ab toisehin..a)- iA eialelsioyaicaselorene oie 62 
Shell dextral (wound to the right); 
land and fresh-water..... aleteleletetete aia Mawaneigsb sie) sue dsveleusneh sy ayods) san epelesel oy 6xe 63 
Catmmnella truncate) i. sis csis\skeiei00.6eue.a1a of aicusvalsieveveke Physopsis africana 
Goburmell a SEMAINE Coie) os ere, oie: s.c0%00 ane ae (Saas aus .--Bulinus truncatus 
Aperture more than 1/3 the height 
Grae nees lene fees =~ WAtel , oveia\s «dave a oustieyacs, 2ice°S, aud. obe,010,% 10: §) 6.0.0 @) oc alene © 64 
Aperture 1/3 or less the height of 
resshell: land anhabitants oy, sisc1s odie vis «010° 0 60. % eietodelelsisieiele telat) «© 66 
Columella straight, without a plait; 
aperture less than 2/3 the height of 
AL eae Rese Mes ect n\ a ahst ols is Ale. = SoyiSita, 02616) 6 2eier Jaime 'n, Sin terayeeiaia. ope 6% 65 
Columella twisted into a distinct 
plait; aperture more than 2/3 the 
PEC IRE OAM CHIE SINENL Ua aievs)iata ce sneils «iia oon 01006 w's''4 8 see 6 80 Radix natalensis 

