Aclis.] GASTROPODA. 327 



Remarks. This species may represent the Aclis (Rissopsis) hyalina, 

 Hutton (N.Z.J.S., ii, 1884, 173), the type of which seems to be lost. 

 Mutton's species is unfigured, and the description scarcely sufficiently 

 full to identify it with certainty. In any case, A. 'hyalina, Hutt., 

 cannot stand, the name being preoccupied by Watson. 



2. Aclis succincta, Suter, 1908. Plate 16, fig. 6. 



Aclis succincta, Suter, T.N.Z.I., xl, 1907 (1908), 362, pi. 28, f. 4. 



Shell very small, turreted, perforate, hyaline and somewhat shining. 

 Sculpture consisting of spiral threads, one upon the middle of the 

 shoulder, the second (most prominent of all) on the angle of the shoulder, 

 the third (slightly finer) a little below the periphery, and the fourth 

 just above the suture ; base with a few additional lirse ; the whole 

 crossed by oblique rather distant axial lines reticulating the interstices 

 and extending over the base ; the axial sculpture by far not so con- 

 spicuous as the spiral. Colour light horny. Spire turriculate, much 

 higher than the aperture ; outlines straight. Protoconch small, obtuse, 

 spirally sharply ridged. Whorls 6, regularly increasing, distinctly 

 shouldered, and angularly narrowed again below the periphery ; base 

 convex. Suture distinct, margined above by the fourth spiral. 

 Aperture sub vertical, oval. Peristome discontinuous, sharp. Colu- 

 mella vertical, somewhat arcuate, a little broadened and subtruncated 

 below. Perforation narrow, open. Operculur/i unknown. 



Diameter, I'l mm. ; height, 2' 6 mm. 



Animal unknown. 



Type in my collection. 



Hab. Near the Snares, in 50 fathoms (Captain Bollons). 



AGLOSSA. 



The two following families of Tcenioglossa Platypoda have neither 

 radula nor jaw, and are therefore called Aglossa or Gymnoglossa. They 

 are suctorial animals, with a well-developed proboscis, and are often 

 commensal or parasitic on Echinoderms ; some are abyssal. A third 

 family, Entoconchidce, is included, but none of its members have 

 hitherto been recorded from New Zealand. 



Fam. PYRAMIDELLIDJE, Gray. 



Animal with 2 flattened, subtriangular or elongate tentacles, 

 grooved or auriform in the larger forms, the funicles with a ciliated 

 area ; below the tentacles an oral orifice, from which extends a long, 

 retractile, subcylindric proboscis, but there is no muzzle like that of 

 Epitonium ; below the oral orifice is a distinct elongated projection, 

 named by Loven the " mentum," which is usually more or less medially 

 grooved or fissured. Foot short, moderately pointed behind, with a 

 small opercuhgerous lobe above and sometimes a small tentacular 



