PARTULA OTAHEITANA. Lt7/Al 
yet all such shells lack the red element on the body-whorls. A reddish apical color- 
ing may be displayed, but this is an independent character, and its presence or 
absence enters only incidentally into the following discussion. In Oopu and some 
other places certain shells exhibit an “orange”’ color, due to a light shading of red 
over the yellowish ground-color, wherefore such specimens are to be included in the 
“red” class. Thus, the two main divisions differ according to the “absence of red”’ 
and the “presence of red”’ as a light or deep general tinge. The colors of the embry- 
onic shells are much less intense and therefore less contrasted than those of mature 
shells, but the same basis for classification may be employed. In itself, the basic 
fact of alternative inheritance is suggestive of a Mendelian order. 
Data for the yellow and red classes. 
TaBLe 114.—Partula otaheitana rubescens. 
Adult population. Gravid adults containing young. Embryonic population. 
Valley. Per Per Per Per Per 12} 
er 
mae neiet Total. | cent cent Nene! Ne Total.| cent cent mat Ngee Total. | cent cent 
y : j yellow.| red. y 7 i yellow.| red. y j yellow.| red. 
/NI@WMs voc 600006 79 67 146 54.11 | 45.88 31 25 56 55.36 | 44.64 37 30 67 55.22 | 44.77 
Papenoo..... 105 237 342 30.70 | 69.29 59 130 189 31.22 | 68.78 | 181 127 308 58.76 | 41.23 
Parauraee eerie 67 22 89 75.28 | 24.72 44 17 61 TPA || PY BY 70 15 85 £3.35) || 7/68 
PRYDE. 66000000 71 41 112 63.39 | 36.60 47 28 75 62.66 | 37.33 80 33 113 70.79 | 29.20 
aavin inert 207 7 214 96.73 BAU || WAS 3 129 Of Cl) 2.88 || 173 3 181 98.34 1.66 
@opurpereerieiec: 98 174 272 36.03 | 63.97 74 121 195 37.95 | 62.05 96 171 267 35.95 | 64.04 
mrotallary a ccsecuececes 627 548 |1,175 53.36 | 46.64 | 381 324 705 54.04 | 45.95 | 642 379 |1,021 62.88 | 37.12 
LSKSGEYR280.00000000 104.5} 91.3) 195.8) 59.37 | 40.62 63.5} 54.0) 117.5) 59.50 | 40.50 | 107.0} 63.2) 170.2] 66.90 | 33.09 
ANTENA oo00 2 6 8 25.00 | 75.00 1 3 4 25.00 | 75.00 4 3 7 57.14 | 42.86 
Haaripoorenicieia: 7 12 19 36.84 | 63.16 3 5 8 37.50 | 62.50 16 4 20 80.00 | 20.00 
WIIATCL ote qv cit ortes 11 4 15 73.33 | 26.67 11 4 15 73.33 | 26.67 14 9 23 60.87 | 39.13 
Mahaenaeinreceiec: 0 6 6 0 100 0 5 5 0 100 0 9 9 0 100 
(Wtuutaimererrrier 5 0 5 |100 0 3 0 3 |100 0 4 0 4 |100 0 
Matitiramerririoer: 23 59 82 28.05 | 71.95 5 5 10 50 50 12 3 15 80.00 | 20.00 
INEM oo 000000C 101 18 119 84.87 | 15.12 8 0 8 |100 0 7 6 13 53.84 | 46.15 
Total, 13 valleys..| 776 653 1,429 54.30 | 45.69 | 412 346 758 54.35 | 45.65 | 699 413 /|1,112 62.86 | 37.14 
Aver., 13 valleys..| 59.7| 50.2) 109.9) 54.18 | 45.81 31.7) 26.6) 58.3) 57.14 | 42.86 53.8) 31.8 85.5) 64.09 | 35.90 
The first step is to eliminate the colonies whose representations are too few 
numerically; these are the associations of Faarumai, Faone, Tehoro, Aionifaa, and 
Apirimaue. ‘The remaining rubescens colonies are 13 in number, whose constitution 
is given in full in table 114, as regards the relative numbers of “yellow” and “red” 
individuals (a) in the whole adult population, (b) in the group of gravid adults con- 
taining distinguishable young, and (c) in the offspring generation itself. In the six 
valley series listed in the first part of the table the figures are satisfactorily large 
even in the case of the embryonic population, which varies from 67 in Ahoruu to 
267 in Qopu and 308 in Papenoo. In the other seven series, the offspring generation 
runs from 4 to 23 only, while in addition the numbers in the adult series are by no 
means favorable; hence these seven are not to be worked out in detail. Again, the 
collection yielded only yellow types in Utuufai Valley and only red-shelled snails 
in Mahaena, so that the question of alternative inheritance does not arise in these 
two cases. Finally, it must be noted that although the numbers are large in the 
series from Haavini, placed in the first list, the proportion of red shells is too small 
to serve for a rigid analysis, such as is made of the remaining five. 
