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SCIENCE-GOSSIP. 



175 



/3. 



/8. 



I. Section Kndotuvka. 



\. Palatal foKts in one Hcricti. 



A. .Shi-n 14-15 m.fn. horizontal fold hclow 

 parietal plate . . pinacis, 

 I1. Shell not cxccedin^f m.ni. horizontal 



fold ahscnt . . . . . . s<nverbyi, 



H. Palatal t'oUUin two series, 



a. Parietal plate without denticles .. fultoni 



b. Parietal plate with one dentiele pos- 

 teriorly . , . . . . . . macromphalus. 



c. Parietal plate with Xwo denticles posteriorly. 

 a. Shell not exceeding 6 m.m. 



• One upper and onv; basal palatal told, 

 t A short horizontal fold above 



parietal plate I'landii. 



tt horizontal fold none . . . . minor. 



Only one basal palatal fold . . hanUyi. 

 J. shell S-10 ni.m. 



• Parietal plate ^jlves off anteriorly a 

 horizontal f*ild from upper extremity ; 



one short horizont.1l fold below . . plectostonia. 



• • No horizontalfoldproccedingfrom 

 parietal plate; two short horizontal 



folds below . . . . . . . . . . affinis. 



II. Scciion Chersakcia. 



1. Dkxtrai.. 



A. Transverse pariet.1t plate simple. 

 a. Free horizontal parietal folds none. 

 a. Palatal folds j/.v. 



•Connected by .1 transverse ridpc; 

 shell ay m.m. Oj?'*"'- 



■• Not connected ; shell 34-J6 m.m. . andersoni. 

 }. Palatal folds //rr; shell ir m.m. .. serica. 

 y. Palatal folds Jtrrw with two denticles iaotiiontana. 

 h. \ tree interrupted horizontal fold in 

 front of parietal plate; palatal folds si.i\ 

 (our inner united by a vertical ridge, 

 scNcn denticles posteriorly . . austeni, 



H. Transverse parietal plate g-iving^ off 

 anteriorly aro7x a shoH horizontal fold, with 

 a denticle below plate. Palatal folds six; 

 shell loi I m.m. . . muiu'purcnsis. 



C. Transverse pjrietal plate (jiving off 

 anteriorily bciinv a lottg horizontal fold, 



a. With a median horizontal fold cou- 



tinuoiis to the peristome ; shell jo m.m. . . brachydiscus. 



b. With a median horizontal fold /«- 

 /i-/j';-'//i'rf; shell 16 m.m dcxtrorsa. 



2. Sinistral. 



Parietal plate simple, 

 n. Horizontal fold below transverse 

 parietal plate, short. 



a. No median fold muspratti. 



jO. A long median fold present. 



"^ A third short horizontal fold be- 

 tween upper and lower parietal folds, 

 t Palatal folds, all horizontal, shell 



to m.m pcrarcta. 



+t Palatal folds, one vertical, rest 

 horizontal ; shell 7.5 m.m. . - . . shiroicnsis. 



•• No third fold present nagaatsis. 



b. Horizontal fold below transverse parie- 

 tal plate long, joined to apcrtural ridge pcrrtcrac. 



c. Three short horizontal folds in front 



\:>i transverse parietal plate, none below it re/ugo. 



B. Transverse parietal plate giving off 

 anteriorly below a short horizontal fold ; a 

 long median and a long lower fold present, 

 joined to apertural ridge. 



a. P.ilatal folds : all horizontal .. .. shancnsis. 



b. Palatal folds : one oblique, rest hori- 



(X. Parietal plate rounded id outline . . Uiophis. 



fj. Parietal plate footfu'dixx outline . . pscudophis, 

 C. Trannverse parietal plate giving off an- 

 teriority below a fthort horizontal fold, two 

 short free horizontal folds above the latter, 

 and a lonj; one below joining the apertural 

 ridge. . . . . , . . . . brahmn, 



III. Section Endoplon. 



A. Shell flattened. 



a. Armature imknown .. .. .. pklyarta. 



b. Two vertical pariet.il plates .. brachypUcta, 



c. One vertical parietal plate with two 

 denticles in front .. smithtana. 



B. Shell with more or less conical spire. 

 .1. One transverse parietal plate. 



it. One denticle in front of parietal plate. 



■* Parietal plate rounded in outline ; 



shell not exceeding 26m. m. .. . scklumbcrgeri 



** Parietal, plate toothed in outline ; 



shell, 30 m.m. . . . . . ■ j'oz'ia. 



p. Two denticles in front of parietal 

 plate . . . , . . vilif'lnryi. 



b. Two transverse parietal plates. 

 (X. One horizontal parietal fold. 



• above anterior plate .. .. .. giardi. 



•• below both plates congcsta 



p. Two horizontal parietal folds, one 

 above, one below, the latter joined to 

 the two transverse plates . . . . /rancoisi, 



IV. Section Pi.i-:cTOi'vi.is, s.s. 



A. Two transverse parietal plates. 



a. Parietal plates parallel ; upper hori- 

 zont.ll palatal fold bisected. Shell less 

 than 20 m.m. 



a. Median parietal told truncate, not 



joined to apertur.1l ridge .. .- .. ponsonbyi. 



p. Median parietal fold not truncate, 



joined to apertural rid^e tissochlatrtys. 



b. Parietal plates divergent; upper hori- 

 zontal palatal fold not bisected. Shell 



more th.in jo m.m. . . . . ittagiia. 



c. .Vnterior parietal plate giving off a long 

 horizontal fold above, and 



U. A short one below, half the length of 



upper ; palatal folds in two series . . luoodtkorpd 



p. Lower fold one-quarter of the length 



of upper : palatal folds in one series . . leucochila. 



B. Three transverse parietal plates.. .. fcddcni. 



C. Parietal plate ramified. 



a. Shell acutely keeled. Parietal fold tri- 

 furcate ; a short horizontal fold near 

 aperture O claspis. 



b. Shell not keeled. Parietal fold tri- 

 furcate. 



((. No horizontal fold below parietal 

 plate, a free interrupted horizontal fold 



in front cairnsi. 



p. Parietal fold giving off anteriorly an 

 interrupted horizontal fold ; a short 

 horizontal fold below plate . . . . lintcrac. 



y. Parietal fold giving off anteriorly a 

 continuous fold 



• Shell thin karawrum. 



•• Shell thick. 

 + L'ppcr arm of parietal fold 

 longest, lower horizontal fold united 



to apertural ridge repcrcussa* 



t+ Lower arm longest, lower hori- 

 zontal fold not united to apcrtural 

 ridge. 

 j Whorls much flattened, umbili- 

 cus very shallow anguiiur^ 



\\ Whorls less flattened, umbilicus 



deeper . . . . achatina. 



