PARTULA OTAHEITANA. 
MaHAENA VALLEY. 
201 
This is the original home of the 3-banded shells (plate 29, figs. 38 and 39) called 
dubia (= dubia) by Pease, Garrett, and Pilsbry. 
section, Garrett’s specific remarks have been quoted, and the differences between 
the situation depicted by him and that of the present have been duly noted. 
In the introductory pages of the 
In 
addition to the fact that Garrett found no striped affinis elsewhere, whereas in my 
own collections they appear in 19 other localities, it is noteworthy that Garrett 
took no sinistral affinis outside of Papenoo. 
reversed snails (plate 29, figs. 40 and 41) now exist in small numbers. 
Tiarel. 
TaB_e 137.—Partula otaheitana affinis. 
Mean VALUE. 
Mahaena Valley. 
In Mahaena both plain and banded 
Certainly, 
then, the complexion of this colony has changed greatly during recent years. 
The statistics (table 137) show that the shells are slightly larger than those of 
The two color-classes are substantially the same, allowing for the high 
probable errors due to small numbers. 
| Shell. Aperture. Length aper- 
Series. No. pure gengeh Tooth, index. 
shell, propor- 
Length. Width. Proportions. Length. Width. Proportions. tions. 
mm. mm. p. ct. mm. mm. Dp. ct. p. ct. 
Dex., plain..... 132) 16.6954+.0429) 9.6940 .0210) 58.0228+.1273) 8.7484+.0234| 6.8325+.0181) 78.0075 .1387) 52.3258+.1080] 3.0151 .0468 
banded... 5} 16.7900 .1557) 9.8200+.0615) 59.1000 .5594) 8.9400+ .0451| 6.8200+.2039| 77.3000 = .2257| 53.1000+.4091| 2.8000 .2257 
Dex., all........| 137) 16.6989+.0414) 9.6985+.0204) 58.0620 .1249| 8.7555 .0227| 6.8314+.0176) 77.9818 .1341) 52.3540+.1055| 3.0073+.0459 
Sti) MENS oob00 3) 17.2500 .2400} 10.9000 = .2293) 62.8333 .6617) 9.6333+.2044) 7.5666 .1324) 78.8333 .3671) 55.5000+.8412) 2.0000+.0 
banded.... 1) 16.85 10.10 60.50 8.90 7.10 78.50 52.50 4.0 
Sitity Alls odioo oes 4) 17.1500 .1893! 10.7000 .2079] 62.2500+.6021) 9.4500+.1870} 7.4500+.1204) 78.7500 .2797| 54.7500+.7681| 2.5000 .2920 
STANDARD DEVIATION. 
Dex., plain..... 132) 0.7304 .0303) 0.3584+=.0148) 2.1686+.0900} 0.3985+.0165) 0.3080+.0128) 2.3629+.0980} 1.8402+.0763) 0.7975 = .0330 
banded... 5 .5161+.1101 .2039+ .0435) 1.8547 .3955} .1496+.0319) .2039+.0435 -7483+.1596| 1.3564+.2893) .7483+.1596 
Wexrrallency. a. .|| 137 .7187 = .0293 .3547 + .0144) 2.1676+.0883) .3939+.0161) .3050+.0124) 2.3275+.0948) 1.8305+.0746| .7973+.0324 
Sty WENN, oo006 3 .6164+ .1697 -5888+.1621) 1.6994+.4679| .5249+.1445| .3400+.0936 -9428+.2596) 2.1602+.5948) 0 
banded.... ill’ g065888S 00s Gall 0 ODO 00s Gocco losoo cu sDo.0.c.call ooo Dion totic cle | artato.o G crores acienec oO er ene | me Aeneas Acree are 0 
Siitky Gill, Goooede 4 .5612+.1339 -6164+.1470) 1.7853+.4257) .5545+.1322| .3570+.0851 .8293+.1978) 2.2776 .5431| .8660+.2064 
Tas_e 138.—Partula otaheitana affinis. 
Mahaena 
Valley. 
FEcunNDITY. HEREDITY. 
: No. of | Per cent | No. of} No. of Total’ | Average Young, Young, 
Series. Records. a fatal lees Sufi con- for dex., sin., 
eres | Ee ill isco oom tents: gravid. plain. | plain. 
Dex., plain... 130 122 93.8 171 114 285 2.33 Adults: 
banded. 5 5 100 4 7 11 2.20 Dex., plain...}| 114 
Sin., plain.... 3 2 66.6 4 2 6 3.00 banded. 7 
banded.. 1 1 100 1 0 1 1.00 Sins pplainsaen | meee 2 
AU ere ie. 139 130 93.5 180 123 303 Boe} Wo odl&3 |) ANAM oocooc0d 
