Smiim: CArALo;;uH ov Gkn'us Pakiui.a. 483 



117. Partitla sp. Moorca (Clarr. ). (Probably /-*. inoo/raiia 

 Hartm., H. H. S.). 



iiS. Partula sinistrorsa Pse. MS. [z= P. o/ii/w/'/af/a Mrug. var. , 

 H. H. S.). Tahiti (Garr.)- 



119. P. su/>angii/ata Pse., P. Z. S., 1S71, p. 45 S {=: P. faba 

 Mart, var., H. H. S.). Tahaa, Garr. 



The following extracts from the Garrett letters have a general inter- 

 est in connection with the genus Partula : 



November 28, 1878 : " Following is a list of all the ground species 

 (probably of the Society Islands only, H. H. S.) : approximata, pinguis 

 (= riistica Pse.), p/ani/abrum, producta, navigatoria, fusca, lugubris, 

 vittata, (Toalis (= lugubris var.?), compressa (^= 7'adiata Garr.), 7'us- 

 tica and crassilabris. All the others are strictly arboreal. The ground 

 species are only found on Tahiti, Raiatea and Tahaa." 



Feb. 10, 1879 : "After eliminating the well-marked Tahitian species, 

 such as P. altertiata, clara, hyalina, trilineata, lineolata and producta 

 from the other species of that island, we have left a very difficult group 

 to study. These include otaheitana, lignaria, amabilis, rubescens, etc. 

 They have not the same specific value as those mentioned above. All 

 the former are not connected with each other, or with the latter group, 

 by intermediate forms. With the exception of producta, which is a 

 ground species, all the others are arboreal. 



Whether the oathcitatia group includes one or several species will, 

 in my opinion, always remain an open question, for the simple reason 

 that nearly all conchologists disagree more or less in what constitutes 

 a good species. I am not quite satisfied with my own conclusions in 

 regard to some of the species, and in order to clear up doubts it will 

 be necessary to revisit certain localities." 



May 8, 1879 : "If you adopt my names and localities (for Pease's 

 species) you will have them correct. At least they ought to be, as I 

 collected all Mr. Pease's species as well as named them. Of course, 

 you will use your own judgment in reducing the number of species. I 

 agree with you that some of the species are simply varieties and many 

 synonyms." 



March 15, 1882 : "There is a good deal of doubt (in the genus 

 Partula) in consequence of the uncertainty of the true types, which 

 in some cases cannot be relied on as represented in the British Museum. 

 With regard to Cuming's localities (who collected in this group some 

 forty-five years ago), it really seems as if he intentionally gave the 



