MOLLUSCA — HEDLEY AND MAY. 123 



intermediate form, Peristernia rudolphP, Henri and Brazier, 

 which also occurred or!' Cape Pillar, is distinguished from the 

 novelty by its coarse spirals. 



Philine columnaria, sp.nov, 



(Plate xxiv., figs. 25, 26). 



Shell trapezoidal oblong, thin, semitransparent. Colour milk- 

 white. Sculpture : fine close spiral scratches crossed by irregular 

 and inconspicuous growth lines. Aperture below broad, above 

 narrow, the summit arched, projecting beyond the spire, inserted 

 below the top of the last whorl. Edge of outer lip simple. 

 Inner lip defined by a thick layer of callus, at the base of which 

 is a small umbilical groove. Centre of the summit occupied by a 

 shallow pit margined by a groove, but the nucleus is concealed by 

 a layer of callus spreading from the suture. Length, 6 - 5 ; 

 breadth, 5 mm. 



Several specimens. The novelty is larger than other Australian 

 forms, except P. anyasi. It is not, however, the young of that 

 species, for it is more trapezoidal, has distinct spiral lines, and an 

 axial hollow above. 



Lepidopleurus columnarius, sp.nov. 



(Plate xxiv., tigs. 27, 28). 



Valves round backed, greatly arched, lateral areas inclined to 

 the rest of the valve. Posterior valve with full rounded umbo. 

 Girdle with minute, dense, imbricating scales. Colour uniform 

 waxen. Sculpture : minute grains strung in longitudinal 

 radiating rows, parted by deep grooves of equal width. Going 

 forwards from the mucro additional rows are intercalated. The 

 pleural and jugal areas together have about fifty rows. The 

 lateral areas aie differentiated by densely packed, less prominent 

 and disarranged grains. Length of single curled and shrivelled 

 specimen about 8 mm.; breadth, 3 mm. 



This is the first deep water Chiton to be reported from Austra- 

 lian waters. We have not the advantage of comparison with 

 specimens, but, judging from literature, the novelty has a general 

 resemblance to L. cancellatus, Sowerby, and in detail differs by 

 smaller and denser granulations. Compared with L. inquinatus, 



9 Henn and Brazier— Proc. Linn. Soc. N.S. Wales, (2), ix., 1894, p. 166, 

 pi. xiv. , f. 1. 



