Philine.] GASTROPODA. 541 



whorl very large, flatly convex, open from below. Outer Up narrowly 

 convex and projecting beyond the spire above, forming a deep sinus 

 with, the body, very little convex in the middle, rounded on joining the 

 basal lip, which is oblique, straight, or slightly convex, regularly 

 arched toward the high, oblique, arcuate, and very thin columella. 

 Inner lip very thin, spreading broadly beyond the pillar and upon the 

 short strongly convex parietal wall. 



Diameter Maj., 7 mm. ; min., 3-5 mm. : height. 8-8 mm. (type). 

 Diameter Maj., 12mm. ; min., 6mm. : height, 13-5 mm. (large 

 specimen). 



Animal elongate, flattened, yellowish-white, the head-disc oblong, 

 with a distinct median longitudinal groove ; much longer than the 

 posterior quadrangular mantle-shield, which entirely covers the shell. 

 Parapodial lobes long, but not very high. The 3 masticatory plates 

 are lozenge-shaped, devoid of perforations, dark brown ; outer face 

 hollowed, with a central longitudinal flat bar, leaving a triangular 

 groove on each side of the middle ; inner face convex, the central part 

 with a broad longitudinal median groove. The outer layer of these 

 plates consists of calcium-carbonate, the inner and greater part is 

 chitinous, insoluble in acid and alkali. The length of the animal 

 figured is 20 mm. ; that of the gizzard plates 5 mm. 



Radula having the formula 1 + 0+1. There are about twenty 

 longitudinal rows of teeth, which are falciform, light brown, finely 

 serrate at the inner lower edge, the denticles simple. 



Type in my collection. 



Hob. Akaroa Harbour, in 4-6 fathoms, type (H. S.) ; Wet Jacket 

 Arm, near Resolution Island, in 12 fathoms (Captain Bollons) ; dredged 

 on sandy flats, Rangitoto Channel (T. F. Cheeseman). 



Remarks. The sculpture is exactly like that of the species, but the 

 form of the shell is different, not contracted above. It seems to me 

 very probable that if series of these molluscs, obtained at different 

 localities and from various depths, could be examined, intermediate 

 forms would be forthcoming ; however, with the scanty material at 

 my disposal, I consider it preferable to keep the two forms separate 

 for the present. The sculpture alone suffices to distinguish the shell 

 from P. Angasi, Crosse, and P. aperta, L. No doubt Philene teres, 

 Hedley, recommended by Webster to be added to fauna list (T. N.Z.I., 

 xxxvii, 280), is not Hedley 's species at all, but this subspecies. 



2. Philine umbilicata, Murdoch and Suter, 1906. Plate 23, 

 fig. 9. 



Philine umbilicata, M. & S., T.N.Z.I., xxxviii, 1905 (1906), 279, pi. 21, f. 2. 



Shell small, oval, truncate above, umbilicated. Sculpture incon- 

 spicuous ; distant very fine microscopical spiral lines are crossed by 

 irregular curved and very fine growth-lines. Colour white. Spire 

 slightly immersed. Protoconch minute, smooth. Whorls 2, very 



