136 | Transactions.—Zoology. 
N.Z. Inst., vol. Xvi. Pp. 163) descriptions of C. angwiculys, 
The interstices between the riblets are more distinctly retigy. 
ted in the variety: | 
la nd North Island: Hunua Range (Captain T. Broun). 
Genus Laoma, Gray. 
8, Laoma ciliata, n. sp. Plate XXI., figs. 38, 38a. 
Shell minute, pupiform, perforated, pale-horny without 
markings, not shining, very thin and fragile, diaphanous, with 
oblique somewhat distant thin ribs, about six per millimetre, 
which are produced into a tooth-shaped membrane below the 
suture ; a second row of cilie is on the body-whorl round the 
base, but they are mostly rubbed off; interstices with fine 
growth-lines. Spire elevated, first cylindrical, then dome- 
shaped. Embryonic whorl smooth, blunt. Periphery angled 
and sinuated. Whorls 6, the first three very slowly, the 
others more rapidly increasing in size; they are slightly 
convex above, rather concave below, the last carinated near 
the aperture; suture not deep. Aperture transverse, squarish, 
the outer lip sinuated, the basal slightly arched, and the colu- 
mella almost straight and vertical, but little expanded above. 
Mouth with two lamelle ; one slender, long lamella on the 
middle of the outer lip, and a similar one in the angle where 
the outer and basal lip meet. Umbilicus previous, very nar- 
row, but open. Base almost flat. 
Diameter, 12mm.; height, 2mm. 
Hab. North Island: Near Wanganui, where it was dis- 
covered by our most enthusiastic conchologist, Mr. R. Mur- 
doch. | 
Note.—This highly-interesting little shell is totally different 
from most of the other species of Laoma s. str.; in the pecu- 
liarities of the epidermis it is allied to Phrixgnathus regularis, 
ZHischrodomus, and Therasia celinde and tamora. 
Dentition very much the same as in Laoma leimonias. 
Formula of teeth 15—1—15. | 
9. Phrixgnathus murdochi, n.sp. Plate XXL, figs. 89-390. 
Shell depressed conoidal, broadly umbilicated, pale-horny, 
waxen, thin, diaphanous; finely and closely radiately striated, 
stria crossed by microscopical spiral lines; spire somewhat 
dome-shaped, rather acute at the apex; embryonic whorl 
smooth; periphery carinated. Whorls 6, slowly and regu- 
larly increasing, flatly concave, strongly margined, margi 
projecting, tessellated with white and chestnut, the last not 
descending in front; suture superficial. Aperture squaris®, 
diagonal; peristome straight, acute, outer lip sinuated, basal 
lip nearly straight, columella straight, slightly oblique, @ little 
reflexed above. Umbilicus broad, 45 per cent. of the diameter, 

