PARTULA, RAIATEA AND TAHAA. 241 



black, and frequently strigated. Yellowish horn-colored ex- 

 amples with the base and the sutural band chestnut, are not 

 uncommon. The lip, though usually white, is frequently mar- 

 gined with purple-brown. Length 20, diam. 11 mm. 



"The above is about the average dimensions. My largest 

 example is 24 by I3y 2 and the smallest adult 17 by 10 mm. 

 Sometimes, though rarely, the spire equals half the length of 

 the shell. Very old examples have a more or less nodulous 

 columella and a more or less distinct denticle on the outer 

 lip." (Garrett). 



Partula fusca PEASE, Amer. Jour. Conch., 1866, p. 193; 

 Proc. Zool. Soc., 1871, p. 473. BINNEY, Proc. Aead. Nat. Sci. 

 Phil., 1875, pp. 245, 247, pi. 19, fig. 9 ( anatomy ) . PFEIFFER, 

 Mon. Hel., viii, p. 205. SCHMELTZ, Cat. Mus. Godeff., vi, 

 p. 81. HARTMAN, Cat. Part., p. 6 ; Obs. Gen. Part., Bull. Mus. 

 Comp. Zool., ix, p. 182 (excl. ovalis and lugubris). GARRETT, 

 Journ. A. N. S. Phila. ix, p. 71, pi. 3, f. 50. Partula protea 

 PEASE, MS. coll. Pease, 1863. SCHMELTZ, Cat. Mus. Godeff., 

 v, p. 92. PFEIFFER, Mon. Hel., viii, p. 209. 



Raiatea: The metropolis of this very variable ground 

 species is in Vaioara valley, on the west coast of Raiatea, the 

 headquarters of P. garrettii and navigatoria. It has not 

 migrated any to the southward, but to the northward it oc- 

 curs sparingly far up in Huaru valley. On the opposite side 

 of the island it is found in Tepua valley, and I took a few 

 in a small ravine more to the southward. The Tepua shell, 

 which is the protea Pse., differs none from his fusca. 

 (Garrett). 



' ' Hybrids between protea and the arboreal P. faba are not 

 uncommon, and are usually found adhering to the lower 

 parts of the trunks of trees. 



"In Vaioara, hybrids between fusca and navigatoria, and 

 between the two former and faba, are so frequent as to be 

 very embarrassing in the separation of the three species col- 

 lected in that valley. Like the Tepua hybrids, all those be- 

 tween the two ground species and the arboreal faba live on 

 the lower parts of the trunks of trees." (Garrett). 



