120 ELASMIAS. 



jecting, sharply mucronate [geschweifte] fold; the peristome 

 unexpanded, acute (Kuester). 



Length 3y 2 , diam. 2^ mm. (P/r.). 



Opana [ Opara or Rapa, Austral Group] (Anton). 



Strobilus ovatus ANTON, Verzeichniss der Conchylien: 

 welche sich in der Sammlung von Hermann Eduard Anton 

 befinden, p. 46, no. 1697 (1839). Ackatina ovata Ant., PFR., 

 Symbolae, i, p. 29. Tornatellina ovata Anton, PFEIFFER, 

 Monographia, ii, p. 394; iii, p. 526; iv, p. 652; vi, p. 264. 

 KUESTER, Conchylien Cabinet, Pupa, p. 150, pi. 18, figs. 12, 13. 



Kuester 's figure is copied. It may have been drawn from 

 the type, though that is not stated. It is probably not separ- 

 able specifically from E. apertum Pease. This type of shell 

 is widely distributed in Polynesia, and not enough material is 

 available for a definite opinion as to the status of the forms 

 from different islands. As we have seen no specimens from 

 Rapa, it seems wise to attempt no decision as to whether the 

 ovatum group may best be classed as one species or as a group 

 of closely-related species or subspecies. When series of all 

 ages and from various islands have been obtained by leaf -sift- 

 ing, the question may be approached with less danger of undue 

 lumping or of premature splitting. 



4a. E. OVATUM APERTUM (Pease). PL 30, figs. 2, 3. 



Shell globose-ovate, imperforate, thin, pellucid, glossy, 

 brown-corneous ; spire obtuse ; suture impressed ; whorls 4, 

 rotund-convex, the last subglobose, about equal to two-thirds 

 of the length ; aperture ovate, subauriform, large, about equal 

 to half the length of the shell ; lip thin, acute ; columella com- 

 pressed, bidentate, obliquely truncate ; parietal lamella 

 scarcely prominent; base rotund. Length 3y 2 , diam. 2y 2 mm. 

 (Pease}. 



Society Islands: Tahiti (Pease); Huaheine ; ranges 

 throughout the group, not uncommon on foliage (Garrett) ; 

 Marquesas Is. (Garrett). Rotuma (Gardiner). Tongatabu 

 (Leefe). Sunday Island, Kermadec Is. (Tom Iredale). 



Tornatellina aperta PEASE, Proc. Zool. Soc. Lond., 1864, p. 

 673 ; 1871, p. 473. PFEIFFER, Monographia, vi, p. 264. GAR- 



