152 GASTROPODA. [Aspidobranchia. 



of the flat whorls adorned with distant sharp denticles ; base on the 

 outside with a spiral carina, with low and rounded tubercles ; margin 

 of umbilicus more or less crenulate. Colour white. Spire flat. 

 Protoconch very small, of 1 whorl only, flat. Whorls 3J, rapidly in- 

 creasing, flat above, with a pronounced angle at the periphery, and 

 a rounded carina below ; space between them convex ; base flat. 

 Suture impressed, the serrate processes extending over it. Aperture 

 circular, slightly oblique. Peristome continuous, with a callous varix. 

 Columella arcuate, with an outer tubercle at its base. Umbilicus 

 rather large and deep. Operculum not seen. 



Diameter, 2-5 mm. ; height, 1 mm. 



Animal unknown. 



Type in my collection. 



Hob. Near Little Barrier Island, in 20 fathoms, (R. H. Shake- 

 spear). 



Remark. This species is nearly allied to the foregoing, however 

 distinct from it in several characters. 



4. Liotia solitaria, Suter, 1908. Plate 33, figs. 19, 19a. 

 Liotia solitaria, Suter, P. Mai. S., viii, 23, y.1. 2. f. 2, 3. 



Shell small, discoidal, solid, umbilicated. Sculpture : The flat 

 surface having a peripheral stellate carina, the processes triangular 

 and directed forward ; base bordered by a smooth and sharply 

 elevated carina ; a few radiate folds outside the suture and around 

 the umbilicus. Colour yellowish-pink. Spire perfectly plane. Proto- 

 conch minute, flat, indistinct. Whorls 3^, rapidly increasing, flat, 

 the last very little convex above, slightly concave between the 2 

 keels ; base convex inside the carina. Suture superficial, slightly 

 margined. Aperture circular. Peristome continuous, slightly thick- 

 ened, ornamented with 2 processes produced by the keels. Columella 

 arcuate, thick. Umbilicus moderately wide, showing the apical 

 whorls. Operculum not seen. 



Diameter, 2-75 mm. ; height, 1 mm. 



Animal unknown. 



Type in my collection. 



Hob. Near Little Barrier Island, in 20 fathoms (R. H. Shake- 

 spear). 



Remarks. The only specimen in my possession is not an adult 

 shell. The species is allied to L. stellaris, Ad. & Rve. 



Fam. CYCLOSTREMATID,, Fischer. 



Animal with ciliated, thread-like tentacles ; the eyes on short 

 peduncles ; snout bilobed ; foot elongated, truncate in front, and 

 extending at each angle into a filament ; sides with 3 or 4 pairs of 

 ciliated cirri, and a pair of auricular appendages in front, between the 

 cirri and the tentacles. Jaw scaly. Dentition oo 4 4- 1 -+- 4 oo. 



