4-4 VARIATION, DISTRIBUTION, AND EVOLUTION OF THE GENUS PARTULA. 
The dominant type at present is the one named flavea (figs. 27 to 32, plate 11). 
Apparently it was the most abundant in the original collection returned by Cuming 
to Pfeiffer, for it answers to the early description in being “pale straw-colored, 
rayed with darker streaks and brown lines.”’ At the periphery the peculiar streaks 
of such shells are expanded so as to present the semblance of an indistinct band. 
TABLE 16.—Partula radiolata, Guam. Census of the color-classes. 
No. of strigata- 
Series. SPINS pallida. flavea. fulva. strigata. helix. bicestata. 
Northeast Region: 
"TL ATAGIES fe cays oh ahs desi eee 62 19 36 7 
East Central Region: 
Lolotit in: ote ews ore ae eee ea 2 2 
Barrigada. at sssketetabicmeien.« 23 10 12 1 
MGRDIOM crocs ore areiere- pias 2 wrecarare 4 1 3 abe ¥ cre Sooper 
DedédOs hic. .ctewe ce assseertieres 148 20 70 54 cape 4 
POANICEED conese tar ev cheats male, fie Rants Bigeee e 62 22 38 2 
Coast Central Region 
UMN octal eek eee 2 e+ 2 Poe 
ONE obo ote iio! aah eet ialan nace as 2 “ee 2 te 
"TIBIOHENG «hss. < sce ae ee ee Ee la 2 viene 1 1 
DungCasi i: jas hs 4.5 seis sare 1 1 ote ree 
(Apaiid, garaen)|aknecaess « sane 7 3 4 
Agafialt adi ese: Ske saee tome 3 Baa a 3 
PATUSUAC cr wa cosas saiee rca 41 a3 28 
Cemeterye iF ies oe eee oe Fs 3 3 
Preaidia, OUtCEE po. ciacwesan ea} 23 5 18 
Presidio; MNET ss saci sss se cise as 1 1 
South Central Region: 
Viiel lowers ¢ .0s.g0k 5 tee 204 60 134 Bo ans 10 
Vig Wp We ais s.5668 cosa piece sees Si 28 17 11 eotece ‘ 
Pago Rivers}. 7. wise oo. as 19 2 17 wes 
Pagannorth, .aptncubineisahactose 52 15 25 12 
Wonca seta ee aes eee 26 1 19 6 
Ordot: 3 sev Ss eh 45 3 39 3 
MacCaina tiscnie <a. Sect peony. 29 2 23 4 
PONCE? Wotictscivictusbele an wien isee mies 22 7 15 a5 
Apra Region: 
Cabra, east 9 iorcdia.iiiciscm otek 112 peat 8 ag oa 64 oF: 40 
Cabtas Qveet. wctees aerea sine ate 69 aun 1 pt 37 20 11 
Orote wae trea i ohtcnrd® Swe eee 130 18 39 19 44 pa 10 
West Central Region: 
PU) ee SWE SR CREM Aer Te 1 1 
Salian ss 030. Mees at ee ey 13 1 1 11 
Southwest Region: 
Umatae' Salonga st. $c dsduys bine 64 21 43 
Wniatac Palomar mar. eran aso 62 16 46 ‘me Bb uaa 
Umatac Madogstic.). Se ste. see 144 50 90 sets hte 4 
Merizig fectorectyistty sett oan 83 20 63 
Southeast Region: 
TNALAIAIN cor ce reese anes 46 12 22 12 
Whole Island soi deacun es 0% 1,535 342 814 118 155 29 77 

Pilsbry has called attention to this unusual character and has given an excellent 
enlarged figure of the peripheral region in question (Manual of Conchology, vol. 20, 
fig. 4, plate 41). The census table shows that flavea is present in almost every local- 
ity, and that it is usually the dominant type where it occurs, although there are 
some most interesting exceptions. 
A ot 
