PLACOSTYLUS, NEW HEBRIDES. 75 



little thickened, subpellucid, rather shining. Very delicately longi- 

 tudinally striated and a little malleated, seen under the lens to be 

 marked with subimpressed descending lines. White under a brown 

 epidermis marked with chestnut wrinkles. Spire short, high^conic^ 

 slightly obtuse, roseate or corneous, slightly exceeding a third the 

 total length of the shell. Whorls 5, convex, the first decorticated, 

 punctulate and shining, the last large, long-ovate, a little inflated, 

 the suture slowly and regularly descending in front. 



Aperture ovate, nearly vertical, dull whitish inside ; peristome a 

 little thickened, spreading, reddish inside ; columellar margin ex- 

 panded, covering the umbilicus. Alt. 32-38, diam. 16-18 mill. 



(Mab.). 



New Hebrides: Santo Island (Dr. Francois). 

 Placostylus (Chan's) f ran foisi MAB., Societe d'Hist. Nat. d'Autun, 

 viii, Bulletin, 1895, p. 410, no. 89. 



P. TURNERI (Pfeiffer). PI. 45, fig. 5. 



Shell imperforate, ovate-acute, succinea-like, thin, striatulate ; 

 corneous-whitish, ornamented with olive-brown bands, streaked with 

 darker. Spire conic, rather acute. Whorls 4, a little convex, the 

 last more than two-thirds the total length of the shell, slightly nar- 

 rowed at the base. Columella compressed, callous, thread-like. 

 Aperture a little oblique, acuminate-oval, glossy within ; peristome 

 simple, thin, narrowly expanded, the right margin somewhat flexu- 

 ous, columellar margin adnate. Length 32, diam. (above aperture) 



17 mill. (Pfr.). 



New Hebrides : Erromanga 1. (Mr. Turner). 

 Bulimus turneri PFR., P. Z. S., 1860, p. 138, pi. 51, f. 10 ; Malak. 

 Bl., 1861, p. 11 ; Monogr. vi, p. 9 ; Nomencl. Hel. Viv. p. 284 (as 

 Rachis). 



P. HEBRIDARUM J. Mabille. Unfigured. 



Shell perforate, subturreted-elongate, thin, subpellucid, longitudi- 

 nally very delicately striated, marked with inconspicuous descending 

 impressed lines, somewhat shining ; reddish-gray, the last whorl 

 ornamented with more or less wide, brown zones. Spire raised, red- 

 dish, much exceeding a third of the shell's length. Whorls 5, con- 

 vex, little impressed at the sutures, regularly increasing, separated 

 by an impressed suture ; the last whorl large, rather cylindric and 

 lengthened, regularly descending. 



