PARTULA OTAHEITANA. 261 
TEREEHIA VALLEY. 
Tereehia is the largest valley to the west of Temarua before the southwest 
corner of the island is reached. Undoubtedly it is one of the “two large valleys” 
referred to by Garrett in his description of the distribution of sinzstralis; therefore 
its colony is of much historical interest in addition to its intrinsic value. 
The collection comprises 130 adult specimens, of which 70 were sinistral; 12 
of these display the phea confluens form of coloration, while the rest are banded, 
falling into the three subordinate types described for Maruia. The 60 dextral 
shells are all cestata and they also resolve themselves into the three subordinate 
color-phases, but the group whose members show only faint bands includes a few 
with unusally heavy cross strigations (plate 32, figs. 42 and 43) so that they closely 
resemble striata shells of the unbanded class. The group of cestata (c) with suffusion 
of color over the terminal whorl, is sharply separated from subclass (), which has 
very distinct bands. 
TasLeE 211.—Partula otaheitana sinistralis, Terechia Valley. 
Mean VALUE. 
Shell. Aperture. Length aper- 
i ture + length 5 
Series. No. anal, maanar Tooth, index. 
Length. Width. Proportions. Length. Width. Proportions. tions. 
mm. mm. p. ct. mm. mm. p. ct. p. ct. 
Unbanded, sin.| 12 | 17.6250+.1614) 9.8834+.0753| 55.9166+.3767 9.0000 + .0605) 6.8334 .0659| 76.0000 + .5536| 50.9166+ .4865) 1.6667 + .1214 
Banded, sin....| 57 | 17.6079+.0762) 9.8579=.0360| 55.8859+.1999| 8.9597 + .0362) 6.7702 + .0348) 75.5175 .2422) 50.8333.1546, 1.6207 + .0867 
ANIY Sitios 650006 69 | 17.6109 .0688|) 9.8623+.0326|) 55.8913+.1773 8.9667 +.0317) 6.7812 .0311| 75.6014 .2225) 50.8478+.1532) 1.6286+.0748 
Banded, dex...| 60 | 18.2650+.0648) 10.1433 .0335| 55.5333 .1571) 9.1833 .0351| 6.9600 .0276| 75.6166+.1941) 50.3334 .1378) 1.9500 .0959 
STANDARD DEVIATION. 
Unbanded, sin.} 12 0.8288+.1141} 0.3870+.0532) 1.9347+.2664) 0.3109+ .0428) 0.3385+.0466) 2.8431+.3914| 2.4986+.3440) 0.6236+.0858 
Banded, sin... .| 57 .8528+.0539| .4030+.0254) 2.2381+.1413) .4052+.0256) .3902+.0246| 2.7112+.1712) 1.7303+.1093| .9796+.0613 
ANIL Stiocooacas 69 -8479+ .0486| .4016+.0230) 2.1838+.1254| .3907+.0224| .3827+.0220) 2.7407+.1573) 1.8868+.1083) .9285=+.0529 
Banded, dex...| 60 .7445 + .0458 -3848+ .0237| 1.8043+.1111) .4037+.0248) .3168+.0195) 2.2293+.1372) 1.5829+.0974) 1.1019+.0678 
The important features of the quantitative descriptive (table 211) are (1) the 
substantial similarity throughout of the two sinistral color-classes, and (2) the 
larger size in all absolute measures of the dextral cestata class. The pillar tooth is 
weakly developed, which is interesting in view of Garrett’s statement that s7nistralis 
is always dentated. 
TasBLe 212.—Partula otaheitana sinistralis. Tereehia Valley. Fecundity. 
Chriss. Records: No. of Per cent No. of | No. of Total Average Average 
gravid.| gravid. | eggs. | young. | contents. | for gravid. for all. 
Unbanded, sin..... 12 6 50.0 6 2 8 1.33 0.75 
Banded, sin........ 58 26 44.8 29 10 39 1.50 0.67 
Banded, dex....... 60 34 56.6 28 29 57 1.67 0.95 
