PARTULA OTAHEITANA. 259 
TaBLeE 207.—Partula otahettana sinistralis. Otuna Valley. 
FEcuNDITY. 
A No. of | Percent | No. of] No. of Total Average Average 
Series. Records. i : = 
gravid.| gravid. | eggs. | young. | contents. | for gravid. for all. 
pheeay ease 108 74 68.5 107 58 165 2.23 1.53 
cestata...... 237 166 70.0 251 123 374 De25, 1.58 
INS Secigweod 345 240 69.5 358 181 539 2.24 1.56 
HEREDITY. 
Young, | Young, 
Adults. plain. | banded. otal 
phza confluens...... 20 2 aa 58 
GNC Moocacccoo| oY 3 36 
cestatas(@) meee 8 3 11 
(OER aoeene 39 22 61 7123 
(CA )icca crctolarcerc 44 7 $1 
Abels Guaaadcodane 144 37 181 
MarulA VALLEY. 
With this valley we enter a series of three consecutive localities where dextral 
representatives of sinistralis occur in substantial numbers. Here the reversed 
individuals amount to 94, while the directly coiled snails number 25. Both color- 
classes—phea and cestata—occur in each mode of coil (plate 32, figs. 35 to 41), but 
the cestata shells are distinctly banded for the most part; the suffused coloration 
shown by figures 36, 37, and 41 is somewhat infrequent. ‘The shells of figures 36 
Tas e 208.—Partula otaheitana sinistralis. Maruia Valley. 
Mean VALUE. 
Shell. Aperture. Length aper- 
ture +length A 1 
Series. No. shell, propor- Tooth, index. 
Length. Width. Proportions. Length. Width. Proportions. tions. 
mn. mm. p. ct. mm. mm. p. ct. p. ct. 
phea, sin ...| 43] 18.1543+.0740| 10.3186 .0351) 56.7791 .2276| 9.4349+ .0434| 7.2581 .0354| 76.7791 .2720) 51.8488+.1841! 1.7675+.1060 
cestata, sin..| 60) 17.9250+.00618 10.2467 + .0310) 57.2000 + .1828) 9.2767 +.0379| 7.1633 + .0292) 77.3000 .2497) 51.6333 .1708) 1.4423+.0646 
All, sin.....| 103} 18.0209+.0483| 10.2767 + .0234| 57.0244 .1434| 9.3427 + .0290] 7.2029 .0227) 77.0825 + .1853) 51.7233 .1259) 1.5895 .0606 
phea, dex .. 8| 17.9750+.1549 10.2250 +.0581| 56.6250 .4373| 9.3250 .0802| 7.0250+.0752| 74.7500 .5299| 51.6250 .2511) 1.8750 .2210 
cestata, dex.| 17| 18.3676+.1135| 10.6417+.0534) 57.9117+.3493| 9.6294+ .0582) 7.3352+.0452) 76.2647 +.3100| 52.3823+.3267| 1.4118+.1136 
All, dex....| 25) 18.2420 .0950) 10.5080 .0485) 57.5000 .2778| 9.5320=.0510) 7.2360 .0436| 75.78 =.2868) 52.1400+.2379| 1.5600.1084 
STANDARD DEVIATION. 
phea, sin...| 43} 0.7200+.0523) 0.3418+.0248) 2.2131+.1609| 0.4219+.0307) 0.3439+.0250, 2.6442+.1923) 1.7899+.1302| 1.0307+.0749 
cestata, sin..| 60 .7098 + .0437 -3556+.0219| 2.1000+.1292) .4352+.0268) .3356+.0206| 2.8682=.1765) 1.9619+.1208) .6909=.0457 
INI, Gio 0.0 103) .7271+.0341) .3517+.0165) 2.1580+.1014) .4368+.0205} .3423+.0160) 2.7887+=.1310) 1.8949+.0890) .8765+.0428 
phea, dex... 8 -6495 += .1095 .2437 + .0411) 1.8337+.3092| .3382+.0567 3152+ .0532! 2.2220 .3747 1.0532.1775| 9270 .1563 
cestata, dex.} 17 .6939 + .0802 .3267=.0377| 2.1351+.2470) .3560+.0411) .2765+=.0319) 1.8952+.2192) 1.9669=.2310| .6943=+.0803 
INU, Co 000} 25 .7042 + .0672 .3599 = .0343| 2.0591 .1964) .3781+.0360) .3236+.0308 2.1264-+.2028 1.7636+.1682) .8039+.0766 
1The numbers in the reversed groups are 43, 52; 95. 
