216 RECORDS OF THE AUSTKALIAN MUSEUM 



suture. Umbilicus a broad open funnel, penetrating to the 

 initial whorl, margined by a beaded funicle which ends in an 

 expansion on the columella base. The interior of the umbilicus 

 is spirally scored like the periphery, and is undercut at the 

 junction of each whorl. Height 12 mm.; major diameter 16 

 mm. ; minor diameter 13 mm. 



A single perfect specimen from two hundred and fifty fathoms, 

 twenty-three miles east of Sydney. 



Emarginula superba, sj^- ''^ov. 

 (Plate xxxvii., figs. 7 and 8). 



Shell large, elevated, oval, rather thin, apex much incurved and 

 overhanging at five-sixths of the length. The sides are arched so 

 that the shell only touches a plane surface by its extremities. 

 Colour, exterior gray, interior white. Fissure deeply slit. 

 Sculpture : about sixty sharp elevated radiate riblets whic-h frill 

 the interior margin and are parted by narrow deep interstices in 

 which arise fine secondary riblets. A concentric series of 

 numerous dense imbricating scales traverse both I'ibs and fuxTows. 

 Slit fasciole elevated, two thin erect walls include fine close 

 curved transverse scales. The interior of the fasciole is marked 

 by a heavy streak of callus. Length 24 mm. ; breadth 18 mm. ; 

 height 9 mm. 



A single specimen from two hundred and fifty fathoms. 



This is the largest Australian species, and only two or three 

 species in the world exceed it in size. 



Cyclostrema .tohnstoni, Beddome. 



Cydostrema johnstoni, Beddome, Proc. Roy. Soc. Tasm., 1882 

 (1883), p. 168; Id., Tate, Trans. Roy. Soc. S. Austr., xxiii., 

 1899, p. 215, pi. vii., f. "i a, h. 



Two specimens of this Tasmanian species from three hundred 

 fathoms, are the means of adding it to the fauna of this State. 



TiBERiA nitidula, A. Adams, sp. 

 (Plate xxxviii., fig. 13). 



Syrnola nitidula, A. Adams, Ann. Mag. Nat. Hist., 1860, (3), 



vi., p. 335. 

 Pyraviidella nitidida, Sowerby, Conch. Icon., xv., 1865, Pyiami- 



della, pi. v., f. 35. 



