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 a/finis 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 



