92 AUSTRALIAN LAND SHELLS. 



Sub-ordek L OPISOPHTHALMA. Pfeiffer. 



Mon. Pneum. Viv., 1852, p. 3. Suppl. prim.] 1858, p. 2. Suppl. Sec , 



1865, p. 1. 



Eyes placed on the upper part of the head behind the 

 base of the subulate tentacles ; foot rather short. 



Fam. I. ACICULACEA. Pfeiffer. 



Mon. Pneum. Viv., 1852, p. 3. Suppl. prim., 185P, p. '6. Suppl Sec , 

 1865, p. 1. 



Operculum thin, spiral, few whorled. 



Genus 



TJRUNCATELLA.-Kisso. 



Shell minute, imperforate, turreted, adult always trun- 

 cated, sub-cylindrical, smooth or ribbed ; aperture oval or 

 elliptical, entire ; peristome continuous, straight or slightly 

 expanded, simple or duplicate. Operculum thin, horny, 

 hardly sub-spiral, nucleus basal, 



Animal, tentacles two, short, triangularly diverging, 

 cylindrical, obtuse ; eyes centrally behind ; foot short, 

 rounded at each end ; head proboscidiformed, bi-lobed, by 

 which and the short foot the animal is enabled to creep, 



* T. teres. * T. marginata. * T. scalarina. 



* T. Yorkensis. * T. Brazieri. * T, Pfeifferi. 



* T. ferruginea. 



223. Truncatella teres. Pfr. Plate XV. Pig 9 natural size, 

 9 a., 9 b. much enlarged. M.C. 

 Pfr., Pro. Zool. Soc., 1856. 



Shell hardly sublimate, cylindrical, rather thin, more or less distinctly 

 longitudinally ribbed, pellucid, shining, reddish-horny ; suture 

 margined, strongly plicately-crenated ; whorls in the adult state 4, 

 somewhat equal, rather convex, last shortly crested at the base, 

 callous, whitish ; aperture vertical, broadly oval, above angulated, 

 towards the right dilated ; peristome simple, continuous, right 

 margin rather expanded, attached to the columella! margin. 



Length - 23 ; breadth 0'07 ; aperture obliquely 0-07 long, of an inch. 



Habitat. Trinity Bay, N. E. Australia. MacGillivray. 



The above is the original description given by Pfeiffer. 



224. Truncatella marginata. Kuster. Plate XV. Fig. 8 

 natural size, 8 a., 8 b. much enlarged. M.C. 

 Kuster, Mon., p. 12, Sp. 8, p. 2. Pig. 2426. 



Shell subrimate, cylindrical, gradually attenuating upwards, rather 



