STJTER: on new MOLLDSCA from new ZEALAND. 215 



closed orifice, with a slight dorsal direction. Length 19 mm. ; diam. of 

 aperture 2-5, diam. of apex -Vomm. ; tube, length 1, diam. -4 mm. 



Hah. — Dredged in 18 fathoms. Port Pegasus, Stewart Island, by 

 Captain J. Bollons. 



Type in my collection. My largest specimen has a length of 28 mm. 

 This is a very interesting addition to the fauna of New Zealand. 

 A species belonging to the same subgenus (i). virgula) was described 

 by Hedley in 1903,^ the specimens being obtained in 41 to 75 fathoms 

 off the coast of New South Wales. 



I), arenarium is, as far as I can ascertain, the first species of the 

 subgenus known to possess well-pronounced longitudinal ribs. The 

 little apical tube is present in all the eight specimens collected. 



MOPALIA AUSTRALIS, U.Sp. PL XVIII, FigS. 12-12r?. 



Shell very small, elongately oval, with a blackish leathery girdle 

 and sutural tufts. Anterior valve with 8 slits, teeth smooth. 

 Intermediate valves with a rounded central posterior projection, 

 insertion plates with one slit. Posterior valve depressed, with an 

 oblique slit on each side and bisinuate in the middle behind. Girdle 

 narrow, leathery, slightly broader on the sides, with a few sutural 

 spicules. Colour probably ash-grey with a few longitudinal brown 

 striprs on the jugum ; inside bluish grey with a posterior brown 

 margin. On the intermediate valves the tegmentum forms a narrow 

 band by passing beyond the articulamentum. Sinus broad and slightly 

 pectinate, the sutural plates narrowly rounded. The valve callus is 

 quite distinct. Length 9, breadth 5'5 mm. ; divergence 120°. 



Uab — I am indebted to Captain J. Bollons for two specimens he 

 collected at the Snares Islands (south of Stewart Island). 



Type in my collection. Both examples are so much corroded that 

 it is impossible to recognize the sculpture. The side- slits of the 

 posterior valve leave no doubt about its generic position. This species 

 is, as far as I know, the first of the genus recorded from the southern 

 hemisphere. 



EUSPIKA VENUSTA, u.sp. PL XVIII, Fig. 13. 



Shell large, globose, white, imperforate, with two low spiral ribs 

 round the umbilical region. Sculpture consists of close, unequal, 

 sliglitly wavy lines, which are crossed by subequidistant fine growth- 

 lines, interspersed with distant strong aTid flexuous radial folds, very 

 likely marking periods of rest. Colour light bluish white, porcellanous. 

 Spire conoidal, about one-fourth the height of the shell. Protoconch 

 depressedly globose, formed by 2 J smooth and convex whorls. Whorls 

 bh, first slowly, then rapidly increasing, convex, the last whorl very 

 large and rounded, base convex ; two low and broadly rounded ribs 

 encircling the umbilical region, the outer rib beginning at the lower 

 third of the penultimate whorl and terminating at the junction of the 

 outer with the basal lip. Suture not deep, on the last l^ whorls with 

 a milk-white broad inferior band. Mouth large, broadly ovate below, 



1 Mem. Austral. Mus., vol. iv, p. 328. 



