Encounter Bay, ranging from 10 to 25 fathoms, and not rare as 

 a beach-shell, has been incorrectly referred by me as the young 

 of C. gallinula, whereas, at the time, I did not actually know 

 juvenile states of that species. 



[Kellia rotunda, Deshayes. 

 An examination of living examples proves the presence of a 

 broad and short respiratory canal, proper to Kellia. Mr. Adcock 

 reports to me that the species inhabits the interior of freshly- 

 deserted egg-cases of sharks ; often many examples, from the state 

 of fry to that of the adult, occur, clinging by byssal threads to 

 the surface of the egg-case. Woodward says that Kellioi creep 

 about freely, and fix themselves by a byssus at pleasure.] 



[Genus Epiiippodonta. 



My description of the animal of E. McDougalli proves on 

 examination of less distorted specimens (in spirit) to be incorrect. 

 The mantle-lobes are united, except for a length of about one- 

 third of the animal, at the anterior medial line. The mantle has, 

 however, a narrow marginal reflection coincident with the shell- 

 border ; the marginal reflections of each lobe imbricate before 

 and behind, they are papillary externally and shortly ciliate- 

 fringed on the edge. The inner pair of gills are very large and 

 tumidly swollen, they are united behind. The adductor muscles 

 are in near proximity to the hinge-line. 



Through tlie slit of the united mantle-lobes a pointed cylindrical 

 foot and the thickened margins of the inner gills are partially 

 protruded ; or the latter, when concealed, produce large swellings 

 of the mantle, these I mistook for a creeping disk. 



These characters bring the genus in close relation to Scintilla.] 



Crassatella earnea, Tafe, antea, p. 263. 

 Yankalilla Bay and to north of Rapid Bay (Dr. Verco). 



Unio Novse-Hollandise, Gray. 



Eef. — Proc. Zool. Soc, 1834, p. 57. 



Unio cucumoides, Lea, 1840, and Obs., vol. III., p. 30, t. 7, 

 fig. 2, 1843; id. Reeve, Conch. Icon., 1868, t. 20, fig. 89. 



A black, elongate, narrow, very jDlicate shell, attenuated and 

 narrowly truncated posteriorly. 



Length, 3 J inches ; breadth, 1| inch. 



Lagoon near Alice Springs (coll. Mr. Adcock). 



The identification is based on Reeve's figure of U. cucumoideSy 

 tliough the specimen wants the diversely radiating wrinkled- 

 warts on the posterior side, as described by Gray and Reeve. 

 Smith positively afiirms the identity of this species and U. cucuin- 



