104 



DESCRIPTIONS OP NEW MOLLUSCA, 



the Bornean D. whiteheadi, the latter of which presents other 



analogies. 



Associated with the two Diplommatiyia in the forest at 



Oubatche were Placostylus caledonicus, Petit; Rhytida heraiidi, 



Gassies ; R. ouveana, Souverbie ; Microcystis savesi, Gassies ;. 



Pseudopartula singularis, Pfeiffer; Ainphicyclotus guestierianuSy 



Gassies ; Helicina primeana, Gassies ; Flammidina haladensis,. 



Souverbie; and Endodonta conjinis, Gassies. 



RiSSOlNA ANGUSTA, n.Sp. 



(Fig. 12.) 



Shell narrowly conical, tall, slender, with whorls longitudinally- 

 ribbed and contracted beneath the suture. Colour uniform golden 

 brown. Whorls seven, of which two are nepionic,. 

 the last equalling in length the three previous, 

 slightly rounded ; each whorl contracted, the third 

 at midway down, the rest at intervals receding 

 posteriorly, the last at just beneath the suture ; 

 sutures sharply sinuate. Sculpture ; — no spiral 

 sculpture is visible, the longitudinal is by sharp, 

 strong, perpendicular ribs, slightly arched, suddenly 

 deflected and almost beaded at the above described 

 contraction, continuous from whorl to whorl, faint 

 upon the last. Aperture perpendicular, ovate, 

 scarcely effuse anteriorly, outer lip sinuate, produced, fortified 

 outside by a slight varix, columella overlaid by a thick callus. 

 Length 3^, breadth 1 mm. 



H a b. — Panie, New Caledonia. One example. 

 T y p e. — To be preserved in the Australian Museum. 

 This species was collected with the Teinostoma on a little beach, 

 immediately beneath and to the eastward of Mt. Panie, the cul- 

 minating peak of New Caledonia. 



Messrs. Melvill and Standen have lately published* a 

 catalogue of shells from the Loyalty Islands, which, containing 



* Journ. Conchology, viii. 1897, pp. 84-132, 273-315, 379-381, and 396- 

 421, Pis. ii., iii., ix., x., xi. 



