210 PARTULA, MOOREA. 



appreciable in a 'basal view, as they cause the periphery to 

 be irregular. The lip is like that of nucleola. There is a 

 small nodule above the middle of the columella, and a small 

 but well-developed callous nodule or tooth on the parietal 

 wyll, deep within and near the columella. 



Length 18, diam. 10, aperture 9 mm., whorls 5^ (type) . 



Length 17, diam. 9.9, aperture 9 mm. ; whorls 5*4 (A. N. S.) . 



Moorea (Mr. Greale). 



The larger of the two shells in Dr. Hartman's collection 

 (no. 4242 Carnegie Museum) may be considered the type of 

 this form or race, if it be found racially separable from 

 nucleola. The chief difference is the possession of a parietal 

 tooth by corneola, which is wanting or only weakly developed 

 in nucleola. The back of the last whorl is also somewhat 

 more roughened in corneola. The smaller of the two speci- 

 mens mentioned in the original account of "corneola" is 

 identical with nucleola. 



Pig. 15 represents the type; fig. 17 is a back view of an 

 example in coll. Acad. Nat. Sciences, showing the wrinkles 

 and the longitudinal streaking of the last whorl. 



I suspect that P. concinna Pse. was based on a specimen 

 of nucleola. 



P. T. ELONGATA Pease. PI. 29, figs. 1 to 7, 9 to 11. 



"Shell elongate, slender, turreted, thin, transparent, shin- 

 ing, transversely very finely striated, somewhat roughened 

 longitudinally, narrowly umbilicate; whorls 5%, flatly eon- 

 vex, suture somewhat impressed, very rarely marginated; 

 aperture oblong oval, somewhat oblique, edentate, one-half 

 the length of the shell ; lip evenly and somewhat roundly re- 

 flected. Horn color or pale rose, striped longitudinally, or 

 wholly straw color. Yar. encircled by three chestnut bands, 

 more or less interrupted. " (Pease). 



"The headquarters of this arboreal species is in Vaianai 

 valley on the southeast coast of Moorea, where it is abundant, 

 associated with P. lineata (=suturalis) and P. mooreana. 

 It occurs, also, but in less numbers, in a valley to the west- 



