PARTULA, TAHITI. 191 



valleys and lowland forests for a distance of ten or twelve 

 miles. In the valley which is the limit of the range of the 

 dextral affinis I took several specimens of the sinistral sinis- 

 trorsa. The latter is invariably reversed, dentate or eden- 

 tate, fulvous with three more or less diffused reddish chest- 

 nut bands. Reeve figures the same shell on Plate 3, fig. 13a, 

 as otaheitana. Bandless varieties are frequent, and vary 

 from straw-yellow to fulvous or light chestnut, frequently 

 strigated and the lip white. The 'latter varieties differ none 

 from the true otaheitana of Fautaua. 



" It is worthy of remark that in that part of the district of 

 Papieri, occupied by sinistrorsa, is also the headquarters of 

 the terrestrial P. producta, a dextral species, which is always 

 edentate, and exhibits the fasciation of the former. 



"After passing to the westward of the range of the typical 

 sinistrorsa, which presents the same features for a distance 

 of ten or twelve miles, it suddenly exhibits a tendency to a 

 change in its becoming more stunted, more solid, always den- 

 tated, and the bands, one to three, are sharply defined on a 

 pale ground. It is the sinistralis of Pease, MS., and occupies 

 two valleys. 



"In the next large valley, called Faahuaite, on the south- 

 west coast, we find Pease's crassa (MS.), which is also a sin- 

 istral shell, always dentated, solid, more tightly coiled than 

 sinistrorsa, and the body- whorl is more flattened. It is rarely 

 marked by a single narrow submedian chestnut band. In the 

 same valley, but more inland, occurs a smaller form, which is, 

 I suppose, the P. brevicula, Pse., MS. [see pi. 26, f. 12, speci- 

 men from Dr. Hartman]. 



' ' The following valley, named Punaavia, is the metropolis 

 of the beautiful P. nodosa, which also exhibits three bands. 

 Far above the restricted range of the latter, where the valley 

 turns towards the head of Fautaua, the home of the typical 

 otaheitana, I took a few examples of a Partula, similar to, but 

 larger than crassa. The next valley is the habitat of 

 lignaria. ' ' ( Garrett) . 



Specimens of sinistrorsa received from Pease and Garrett 



