76 PLACOSTYLUS, NEW GUINEA. 



Aperture nearly vertical, ovate, white and obscurely zoned within; 

 peristome somewhat thickened, rose-bordered, a little reflexed, the 

 outer margin a little reflexed at first, then curved ; columellar mar- 

 gin dilated, thickened, covering the umbilicus. Alt. 36-38, diam. 

 16-17 mill. (Mab.). 



New Hebrides : Santo Island (Dr. Fran9ois). 



Placostylus (Charts) hebridarum MAB., Soc. d' Hist. Nat. d' Autun, 

 viii e Bulletin, 1895, p. 410, no. 90. 



Seems to have the color-pattern of P. turneri. 



SPECIES OF EASTERN NEAV GUINEA. 



P. REMOTUS Hedley. Pi. 11, fig. 9. 



Shell an elongated cone, narrow in proportion to length, thick and 

 strong, anteriorly broad and blunt, posteriorly tapering slowly; 

 scarcely perforate. Color pale ochre with a darker broad peripheral 

 band, which is edged above and below with a pale border, and a 

 narrow, dull white margin below the suture. Whorls 6, rounded ; 

 apex blunt, nepionic shell a whorl and a half. Suture impressed. 

 Sculpture : everywhere irregularly crossed by oblique growth lines, 

 both fine and coarse, which interrupt and distort a series of minute, 

 numerous, irregular spiral scratches which are not to be perceived 

 without a lens (see detail fig. 9). Aperture oblique, rudely hex- 

 agonal, subchannelled anteriorly. Columella thickened, externally 

 folded over a narrow umbilical chink, internally sharply bent, the 

 upper limb a flat, deeply entering and obliquely ascending plate, the 

 lower swelling into a slight but distinct tubercle. Outer lip inter- 

 nally much thickened, but neither thickened nor reflected externally, 

 forming a sharp angle at the insertion. A thin callus is spread on 

 the body whorl. In the specimen described, the anterior corner of 

 the aperture is externally surrounded by a series of imbricating 

 lamellae ; this may, however, be an individual feature or repair 

 of breakage. Length 26, breadth 12 mill. (Hedley). 



British New Guinea : the Mambara Goldfield (Coll. Dr. J. C. Cox). 



Placostylus remotus HEDLEY, Proc. Linn. Soc. N.-S. Wales (2), 

 xxiii, p. 97 (May 25, 1898). 



" It is the smallest known Placostylus, and is remarkable besides 

 for its narrow shape, blunt anterior extremity and peculiar aperture." 

 The single specimen was found by Dr. Cox in the aperture of a large 

 Rhysota hercules, in a collection of land shells purchased from a digger 

 returned from New Guinea. 



