152 RECORDS OF THE AUSTRALIAN MUSEUM. 



and two above. On the inner whorls the lamellse grow less 

 prominent and disappear. Between the lamellae the surface of 

 the shell is microscopically spirally grooved. Aperture oblique, 

 not descending, unfinished. A slight callus spreads in advance of 

 the aperture on the previous whorl. Major diameter, 2*4, minor 

 2 "2; height 1"2 mm. 



The curiously tagged lamellae sufficiently distinguish this species 

 from all co-generic forms. In systematic order its place is next 

 to E. paradoxa, Cox. 



Log. — Two specimens were collected at WoUongong, New South 

 Wales, by Mr. A. E. Lower. That figured has been presented 

 by Dr. J. C. Cox. 



Endodonta NORFOLK ensis, sp. nov. 



(PI. xxviii., figs. 4, 5, 6). 



Shell minute, depressed globose, perforate. Colour uniform 

 tawny-olive. Whorls five, gradually increasing, rounded, separated 

 by a deep suture. Sculpture — fine close longitudinal riblets cross 

 the whole breadth of each whorl. Aperture perpendicular, lunate, 

 outer lip sharp. Armature — two lamellse on the parietal wall, 

 one median, curling within and projecting beyond the aperture, 

 the other straight, posterior and deeper seated ; on the outer wall 

 two lamellfe are so situated as to divide with the parietals the 

 height of the aperture into fourths; on the inner side of the 

 columella is a short curved ridge ; the armature does not extend 

 back into the shell for more than half a whorl, its rear aspect is 

 shown in the accompanying dissection (fig. 5). Base rounded, 

 umbilicus about a fifth of the shell's diameter, exposing the previous 

 volutions. Major diameter 144, minor 128 ; height 1 mm. 



The mouth armature will readily distinguish this species, which 

 belongs to the subgenus Thaumatodon, Pilsbry, and is one of 

 many links between the faunas of Norfolk Island and New 

 Zealand. Allusion was made to this species by Brazier in describ- 

 ing E. dispar from Tasmania.* 



The land shells known from Norfolk Island have been described 

 V)y authors as follows: — Helix phillipii, Gray; //. cainpjbellii, Gray; 

 H. insculpta, Pfeifier; II. Jlosculus^ Cox; //. qiiiutalce, Cox; H. 

 exayitans, Cox; Carocalla stoddariii, Gray; Omj)}ialotropis cerea, 

 Pfeifi*er; 0. albocarinata, Mousson; Palaina coxi, H. Adams; 

 Ilelicina pictella, Pfeifier; //. nor/olkensis, Pfeifier. Brazier has 

 also recorded the introduction of the European Vallonia pulchella.f 



Loc. — Collected by J. Brazier in 18G5 on Norfolk Island, South 

 Pacific, in a guava forest on a hill side. 



* Brazier— Proc. Zool. Soc, 1870, p. GOl. 

 t Brazier — Journ. Conch., 1879, p. 281. 



