114 PLACOSTYLUS DIPLOMORPHA. 



Vanua Levu, Rambi, Koro, Taviuni, Gomea, Lanthala (Garrett) 

 and Viti Levu (Graeffe), Viti Is. Arboreal. 



Bulimus morosus GLD., Proc. Bost. Soc. N. H. 1846, p. 190; 

 U. S. Expl. Exped., Shells, p. 72, fig. 82 PFR., Monogr. ii, p. 56 ; 

 iii, 316; iv, 373; vi, 86; viii, 37. GARRETT, Amer. Journ. 

 Conch, vii, 1872, p. 232 CROSSE, Journ. de Conchyl. 1875, p. 20, 

 pi. 8, f. 1. KOBELT, Jahrb. d. d. nialak. Ges. ii, 1875, p. 225, pi. 

 7, f. 7, 8. Placostylus morosus Mouss., J. de C., 1870, p. 125 



SCHMELTZ, Catal. Mus. Godeffroy v, p. 93 SMITH, P. Z. S., 1884, 



p. 270 GARRETT, P. Z. S. 1887, p. 181. KOBELT, Conchyl. Cab. 

 p. 30, pi. 7, f. 4, 5. Bulinms elobatus var. minor CROSSE, J. de C. 

 1864, p. 140. 



This very distinct arboreal species has a wider range than any 

 other species inhabiting the Vitian group. The pointed-ovate form, 

 irregularly wrinkled and dead white surface and large aperture with 

 broadly spreading and reflexed lip, are its prominent features. It is 

 less elongated and less malleated than P. maUeatus. According to 

 Garrett "There exists a rare abbreviated variety on the west end of 

 Vanua Levu, which exhibits a few olivaceous markings similar to 

 those on the latter species." 



Subgenus DIPLOMORPHA Ancey, 1884. 



Diplomorpha ANCEY, II Naturalista Siciliano, iii, p. 344 (Sept.- 

 1, 1884). Type Partula layardi Braz HARTMAN, Proc. Acad. 

 Nat. Sci. Phila., 1886, p. 35 Not Diplomorphus Giraud, Ann. Soc. 

 Ent. Fr. (5), i, p. 409, 1871 (Hymenoptera). 



Shell small, compactly ovate, umbilicate or rimate, solid, composed 

 of 3^-5^ convex whorls, the earlier 1^ densely sculptured with 

 waved or crinkled wrinkles when not eroded. Cuticle thin and 

 lineolate when present. Aperture ovate, the peristome thickened or 

 reflexed, usually stained with orange or red within. Type D. 

 layardi. 



Distribution, New Hebrides. 



A group of small species, mostly described by Dr. W. D. Hart- 

 man, intermediate between Partula and Placostylus in appearance, 

 but shown to belong to the latter group by the characteristic orange- 

 red color usually dyeing the interior, and the apical sculpture, which 

 is very unlike that of any Partula (pi. 72, fig. 17). 



The lineolate cuticle is also a bond between these species and the 



