248 PARTULA, RAIATEA AND T API A A. 



zeichniss p. 40 (nude name). --Partula compacta PEASE, 

 Amer. Jour. Conch., 1866, p. 200; 1867, p. 81, pi. 1, fig. 9; 

 Proc. Zool. Soc., 1871, p. 473. SCHMELTZ, Cat. Mus. Godeff., 

 v, p. 92. PFEIFFER, Mon. Hel., viii, p. 207. HARTMAN, Cat. 

 Part., p. 7; Obs. Gen. Part., Bull. Mus. Comp. Zool., ix, pp. 

 181, 192. GARRETT, Journ. A. N/S. P. ix, 1884, p. 55.- 

 Partula solidula Pse. MS., H. H. SMITH, Annals Carnegie 

 Mus. i, p. 436, no. 4142. 



This arboreal species is obese, solid, not very glossy, with 

 a moderate or quite narrow umbilicus. The lip is not very 

 broadly expanded, 'but is strongly thickened within, white, 

 flat, often more or less dentate, and is conspicuously excised 

 above. The columella is oblique, broad, and bears a moder- 

 ate or heavy callus which is notched at the insertion above. 

 The parietal tooth is well developed. 



Length 20, diam. 13.5 mm. 



Length 21, diam. 13.3 mm. 



P. auriculata has been united by many authors with the 

 totally different P. otaheitana of Tahiti. The erroneous 

 locality "Huaheine" was given by Cuming, who collected 

 the types. As Pease and Garrett have already remarked, 

 P. auriculata was evidently based upon several forms of this 

 group, but the emphasis laid by Broderip upon the flat lip 

 indicates that the form described as P. compacta by Pease is 

 practically typical auriculata. Reeve's Conchologia Iconica, 

 Partula plate 2, figure 11& may be considered the type of 

 P. auriculata. I have figured similar shells, pi. 18, figs. 10, 

 11. The color is usually light brownish yellow, 'but it varies 

 to light chestnut in the lots before me. Fig. 9, copied from 

 Reeve's figure of one of the original lot, is unlike the com- 

 pacta I have seen in being banded. Pease's type of com- 

 pacta, now before me, is a typical auriculata in develop- 

 ment of the apertural callosities. In many individuals the 

 "teeth" are less developed, as in fig. 8. 



41a. P. A. ROBUSTA Pease. PI. 18, figs. 13 to 16. 



The shell is somewhat smaller than the largest P. auriculata, 



