100 



Cylindrical, gaping at each end, covered with a dark brown, 

 horn} r epidermis extending beyond the margins. 



Family Crassatellidje. 



113. Ceassatella castaxea, Eeeve, Mon., t. 1, f. 3. 



In deep water in the Port Lincoln district ; Cape Jaffa, 

 South-East coast, dead shell only (W. T. Bednalll). New Hol- 

 land (Reeve). 



Ovately triangular, chesnut-coloured epidermis, umbones 

 smooth ; length, attaining to four inches. 



Family As tart id .e. 



114. Cardita roselexta, Tate, antea, p. 69, t. 5, f . 3. 

 Deep water, Encounter Bay and Backstairs Passage. 

 Trapezoid, with 22 narrow scaly ribs, spotted with red ;. 



length, about one inch. 



115. Cardita obliqetssima, Tate, antea, p. 70, t. 5, £. 9. 

 Dead shells dredged from 22 fathoms, Encounter Bay (PuJ- 



leine !) . 



Minute, very oblique, concentrically sulcated, and radially 

 ridged on the narrow angulated posterior side. 



116. Mytilicardia crassicosta, Lamarck {Cardita), An. s. 

 Vert., vi., p. 21; id., Eeeve, Mon., t. 2, f. 7. 



Throughout South Australian waters. Also "West Australia 

 and the Philippines. 



Oblong, with radiating costae, which are raised into lamellar 

 arched scales ; colour red or pink, occasionally yellow ; length, 

 two inches. 



117. Mytilicardia coxcamerata, Chemnitz (Cham a) ; Car- 

 dita concamerata, Eeeve, Mon., t. 9, f. 42 ; Thecalia macrotheca, 

 A. Adams and Angas, P. Z. S., 1864, p. 39. 



Under stones at low tide, Eapid Bay (Angas). Mr. E. A. 

 Smith, who has compared the type of Thecalia macrotheca with 

 South African specimens of this well-known species, cannot 

 detect the slightest difference. 



Ovate-oblong, radiately ribbed, a cup-shaped appendage 

 within each valve. 



118. Carditella ixeaxs, E. A. Smith, Mollusca, Challenger 

 Exped., t. 15, f. 10, p. 218. 



Eotund, solid ; rose-coloured ; eighteen radiating costa? 

 separated by very narrow deep grooves, costaa with crowded 

 transverse tubercles. The type specimens are whitish, and 

 were obtained in 28 fathoms, south of Papua. A left valve 

 only, dredged in 22 fathoms, Encounter Bay. 



