PARTULA OTAHEITANA. 283 
last are similar in color to certain large sinzstrorsa shells of the far southeast 
that were distinguished as the color-form phza solida. In brief, the “dark” class 
resembles phea solida of southward colonies, the “light class” is like one of the 
occidentalis color-forms, while the “medium” class is unique, saving for the presence 
of a reddish tone in many cases, which simulates the color of the “red” occidentalis 
group. 
When the statistics relating to the standard characters are arrayed (table 237), 
it appears, first, that the small group from the lower level, taken in 1906, is composed 
of larger and slightly stouter shells, with apertures of relatively greater length; 
secondly, when the colony as a whole is compared with crassa of Punaruu, its 
members prove to be larger and wider in the measures of the whole shell and also 
of the aperture; in the proportionate figures, however, the relations are about the 
Same. 
The tooth is well-developed as a colonial character. 
few banded individuals are aberrant, as would be expected. 
In the third place, the 
TaBLeE 237.—Partula otaheitana crassa aberrans, Taapuna Valley. 
MEAN VALUE. 
Shell. Aperture. Length aper- 
Series. | No. ture length | Tooth, index.! 
shell, propor- 
Length. Width. Proportions. Length. Width. Proportions. tions. 
mm. mm. D. Cle mm. mm. p. ct. D: Ct. 
Plain, 1906...} 14 | 18.4357+.1725} 10.6857 =+ .0823] 58.0000=+ .3389} 9.9285 =+ .0923) 7.4143 .0573] 74.5714 .3438) 53.6428 .1649| 2.0714+.1861 
Banded, 1906. tb |) W783 10.30 57.50 9.30 7.30 79.50 52.50 3.0 
Plain, 1909...) 201 | 18.0335+.0393) 10.4562 .0206| 57.8880 .1050) 9.6432 .0213) 7.1268+.0179| 73.7737+.1355| 53.3905 + .0878) 2.4510+ .0449 
Banded, 1909. 3 | 18.3500+ .4371| 10.7666 .0971) 58.8333 .8002| 9.9666+ .0971| 7.5666 .0367) 75.8333 .8002) 54.1666 .9714| 2.0000+.3179 
All, 1906.....| 15 | 18.3900 .1548] 10.6600 .0960| 57.9666 = .2822) 9.8866 .0904) 7.4066=.0538) 74.9000 .3857| 53.5666.1618] 2.1334+.1784 
All, 1909..... 204 | 18.0382 .0393) 10.4607 = .0204) 57.9019 .1043) 9.6480 .0209) 7.1333+.0178) 73.8089 + .1342| 53.4019 .0878) 2.4445+ .0448 
All...........| 219 | 18.0623 .0416) 10.4744 .0199| 57.9064 .0995/ 9.6644 .0207| 7.1521=.0173) 73.8790+.1285| 53.4132 .0826) 2.4234 .0423 
STANDARD DEVIATION. 
Plain, 1906...} 14 0.9568 .1220}) 0.4565=+=.0582| 1.8803=.2396| 0.5120+.0653) 0.3181=.0405| 1.9073+.2431| 0.9148+.1166) 1.0326+.1316 
Banded, 1906. sl) soecbod au oco cl auc Gucub.cden oc Mob lotas-o Uo odiotb cll 16 aloe cralolnro Old] lio ckorcnn Sceeaeaenetoret | ORC TCHR CR SR SRCRE Gy | accnCeene nS ig ae eed ERE Rear ane a 
Plain, 1909...| 201 -8262 + .0278 4335+ .0145| 2.2077+.0742| .4474+.0151] .3763+.0126| 2.8477+.0958| 1.8469+.0621 9510+ .0317 
Banded, 1909. 3 1.1225+.3091 2494+ .0687| 2.0548=.5658) .2494+.0687| .0942+.0259) 1.2472+.3434| 2.4944=.6869| .8165+.2248 
Alf, 1906... :| 15 -8890 + .1094 5511+.0679| 1.6202+.1995) .5189+.0639|} .3088+.0380) 2.2151.2727 -9290+.1144) 1.0242+.1261 
All, 1909..... 204 .8322 + .0278 4330+ .0144) 2.2085+.0737| .4433+.0148) .3774+.0126) 2.8427+.0949| 1.8604=.0621) .9560+.0317 
INV SG Gesercienets 4 219 -9123+ .0294 .4372+.0141| 2.1842+.0703) .4548+=.0146) .3794+.0122| 2.8191+.0909) 1.8124+.0584) .9352+.0299 
1The numbers are, respectively, 14, 1; 204, 3; 15, 207; 222. 
Still another distinctive feature of the colony is to be noted. The eggs of 
gravid snails are elongated to a remarkable degree, as compared with those of all 
other varieties of Partula otaheitana. 
occurs in correlation with a characteristic color-composition and a fuller shell- 
development. 
Fecundity (table 238) proves to be normal for the respective period of the year 
in both annual series. 
By itself this would not be significant, but it 
