36 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Molluscn. 



Phenacohelix (?) subantarctica, ii. sp. (Plate I, fio;s. 9-11.) 



Shell very small, depressed globose, perforated, finely costate, thin and very 

 fragile, with radiate whitish and brown streaks. .Sculpture consisting of somewhat 

 flexuous, subequidistant, fine radiate riblets, about 16 per millimeter, the interstices 

 with numerous very fine incremental lines, decussated by microscopic spiral striae. 

 Colour yellowish -white, upper surface with somewhat unequal light-brown radiate 

 streaks ; base uniformly brown. Epidermis thin, horny, not shining. Spire low, 

 broadly conoidal, with blunt apex, its height a little less than that of the aperture ; 

 outlines slightly convex. Protoconch flattish, of IJ very lightly rounded whorls, 

 which are indistinctly microscopically spirally striated. Whorls 4, regularly in- 

 creasing, moderately convex, the last very lightly angled at the periphery ; base 

 convex. Suture imjjressed. Aperture lunate, angled above. Peristome sharp, thin, 

 the outer lip convex, subangied ; basal lip broadly rounded. Columella short, 

 vertical, arcuate, slightly reflexed above. Umbilicus narrow, jtertVctly open, per- 

 vious. 



Diameter, 3 mm. ; height, 2-1 mm. 



Hah. — Campbell Island, mostly on Dracophijlhiii), not uncommon (W. K. 

 Chambers). 



Type in the Canterbury Museum, Christchurch. 



I used six dried-up animals for preparing jaw and radula, but, curiously enough, 

 I was unable to find a trace of these organs ; they no doubt were only remnants of 

 the animals. The generic position of the species therefore remains somewhat un- 

 certain, but the characters of the shell are those of PJienncohc/i.r. and, in a much lesser 

 degree, of AJlodiscus. 



Phenacohelix, sp. 



A small, very thin, and fragile shell, but badly damaged on the body-whorl, 

 was amongst the shells collected by Professor Benham on the Auckland Islands. 

 Unfortunately, it was completely destroyed when handling it for drawing up the 

 diagnosis. Being unable to give a figure, I refrain from naming it, but the following 

 characters will help to recognise the shell in case it should be found again : — 



The shell is depressed globose, radially sharply ribbed, about 15 riblets per 

 millimeter. Colour yellowish, with radial straight streaks of light brown. Proto- 

 conch of 1^ whorls, the nucleus smooth, the remainder spirally striate. Whorls 

 convex, regularly increasing, periphery of the last whorl rounded. Umbilicus narrow, 

 open. 



Diameter, about 3-4 mm. 



Hdh. — Auckland Islands (Professor Benham). 



Genus Flammulina, von Martens, 1873. 

 Distribution. — New Zealand. Tasmania. Lord Howe Island, Norfolk Island, 

 and Ponape, Caroline Islands. 



Flammulina phlogophora (Pfeiffer). ISoO. 



Helix phhHjoplinm. PiViffcr, P.Z.S.. 1841) (1850), }). 127 ; Conch. Icon., vii, pi. cxxx, 

 fig. 700. Vitrina zebra , Le Guillou, Rev. Zool., v. 1842, p. 136. Flammulina 



