M teueesteial mollusca inhabiting society islands. 
and desciBes a now speciea under the name of //. the eommm.eet 
lortn inhabiting all the valley* near the principal harbors at Tahiti, and ™'^““Medly 
included among Gould’s varieties of hursMa. In the seventh volun.e he 
IL coarctata and H. turrkula being synonyms of H. sirepta;,^. 
Mr. Pease, in his list of Polynesian land shells (P. Z. S., 1871), refers H coarctata, 
II excamta, II. streptaxon and II turricula to the synonymy of II hursateUa, and adds 
//. to the synonymy of II Jaa,>dnoti, Pfr. He also reeords II Heynernanm 
Pfr., and H. Oceanica, Le GuilL, as distinct species, unknown to him. He doubts II 
Jacquinoti, which Pfeiffer assigns to the Marquesas, being a Society Island species. 1 
niPlincfl to believe it inhabits the Austral Islands, and not Marquesas. 
L. BURSATELLA, Goukl. 
Helix bursatella, Gould (part), Proc. Bost. Soc. Nat. Hist., 1846, p. 175 ; Expl. Ex. Shells, p. 
51 (part). Pfeifler, Mon. Hel., i, p. 185 (part) ; Hi, p. 142 (as restricted). Chemnitz, ed. 2d, 
PI. eXXV, figs. 23-25. (Endodonta) Albers, Die Ilel., p. 189. Reeve, Conch. Icon., 
PI. CXI, fig. 635. (Pitys) 11. and A. Adams, Gen. Moll., ii, p. 113. {Endodonta) Paetel, 
Cat. Conch., p. 91. 
Helix turricula, Ilombron and Jacquinot, Voy. Pol. Sud, Mol., PI. YI, figs. 21—24. 
Pitys bursatella, Pease (part), Proc. Zool. Soc., pp. 452, 475. Prauenfeld, Verh. Zool. Rot. 
Ges. AVien, 1869, p. 873. 
In 1861, 1 gathered numerous examples of this species at Tahiti, but, as previously 
mentioned, my specimens of Libera were more or less intermixed, so I cannot state the 
precise locality where I took the specimens. 
It may be di.stinguished by its serniglobosc form, rather elevated dome-like spire, 
crowded, slightly arcuate riblets, flattened and rather smooth base, and the absence of 
spiral striie. There are six to seven internal laminae. 
Major diani. 7| mill. 
L. COARCTATA, Pfcirt'cr, Plate II, fig. 10. 
Helix bursatella, Gould (part), Proc. Bost. Soc. Nat. Hist., 1846, p. 175 ; Expl. Ex. Shells, 
p. 51. 
Helix coarctata, Pfeiffer, Proc. Zool. Soc., 1849, p. 128; Zeit. Malak., 1849, p. 74. {Endo- 
donta) Albers, Die Hel., p. 89. 
Helix cavernula, Hoinbron and Jacquinot, Yoy. Pol. Sud, Moll., PI. YI, figs. 33-36. Chem- 
nitz, ed. 2d., No. 781, PI. CXXY, figs. 29-31. Pfeiffer, Mon. Hel., iii, p. 143. {Pitys) 
H. and A. Adams, Gen. Moll., ii, p. 113. 
Helix streptaxon, Reeve, Conch. Icon., PI. CXII, fig. 641. Pfeiffer, Mon. Hel., iv, p. 154. 
{Endodonta) Paetel, Cat. Conch., p. 95. 
Common and diffused throughout several valleys on the north and east .side of 
Moorca. On the ground in forests. 
The spiral, raised striie will readily distinguish it from Z. recedens and Z. gregaria, 
inhabiting the same island. They vary some in the height of the spire, and some 
