Mbstayer. — New Species of Mollusca. 133 



Measurements. — Height, 3 mm. ; diameter, 3 mm. 



Material. — Holot}'pe and six paratypes from the type locality ; one 

 from off the Bounty Islands, 70 fathoms ; and two from off the Hen and 

 Chickens Islands, Hauraki Gulf, 25-26 fathoms. 



Rernarhs. — This species is allied to Crossea cancellata Ten. -Woods,* from 

 which it is readily distinguished by the five crenulated spirals. The 

 strength of the sculpture varies slightly in different individuals, and the 

 foregoing description is based on the white holotype and on a well-sculptured 

 paratype, which is placed with it in the Dominion Museum. Mr. C. Hedley 

 saw a juvenile specimen and informed me that he considered it a new 

 species, so I examined my various dredgings and obtained some much 

 larger specimens. 



Family TURRITIDAE. 



Leucosyrinx thomsoni n. sp. (Plate VIII, fig. 5.) 



Oft' Hen and Chicken Islands, Hauraki Gulf, N.Z. ; 25-26 fathoms. 



Shell small, fusiform, thin. Spire a little higher than the aperture. 

 Protoconch, two whorls, globular, white, smooth, dull. Whorls 5 (holo- 

 type 4), sharply shouldered, convex, contracting rapidly to the canal, 

 which is very short, open, and slightly reflexed to the left. Anal notch 

 very slight, near the rather deeply impressed suture. Sculpture, three 

 sharp spiral ribs on the periphery, and many fine sj)iral threads on the 

 base and canal. On the sloping shoulder between the suture and the 

 first spiral are two or three very fine spiral threads, which are, however, 

 almost obscured by the fine sharp axial threads which run slightly obliquely 

 from spire to base, and are somewhat irregularly spaced. Columella short 

 and smooth. Outer lip thin, channelled by the spiral ribs ; inner Up 

 merely a thin glaze on the columella and body-whorl. Colour white or 

 creamy. Operculum unknown. Anvtnal unknown. 



Measurements. — Holotype: Height, 3 mm. ; diameter, 1-5 mm. 



Material. — The holotype and fifteen paratypes from type locality ; and 

 from the Bount}' Islands, Cuvier Island, Auckland Islands, and Dusky 

 Sound, only one specimen from each. Thus it has a fairly wide range. 



Remarks. — This species is rather variable in sculpture, but the three 

 strong spirals on the body-whorl, and the very short canal, are distinctive 

 characters. Some of the young paratypes from the type locality have 

 much stronger spirals ; and there is also slight variation in the axial 

 sculpture, some showing it more than others. The holotype is a young 

 specimen of only four whorls ; a paratype of five whorls which has been 

 used with it in the above description also shows a fine spiral thread 

 between the first and second ribs. Both these specimens are in the 

 Dominion Museum. The nearest ally of this species is the following one, 

 Leucosyrinx cuvierensis, which also occurs in the Hauraki Gulf. 



The species is named in honour of Dr. J. A. Thomson, Director of the 

 Dominion Museum. 



Leucosyrinx cuvierensis n. sp. (Plate VIII, fig. 4.) 



Off Cuvier Island, Hauraki Gulf, N.Z. ; 38-40 fathoms. 

 Shell small, fusiform, fragile. Sjnre slightly shorter than the aperture 

 and canal. Protoconch, two whorls, rounded, smooth, dull. Whorls 3, 



*H. SuTBR, Manual of the New Zealand Mollusca. p. 324, 1914. 



