294 



THETIS SCIENTIFIC RESULTS. 



Leda lefroyi. 

 Fig. 42. 



L. lefroyi differs from 

 the foregoing species in 

 the posterior hinge, 

 whose teeth are more 

 bent, more numerous 

 and less oblique to 

 the dorsal margin. To 

 better explain the 

 difference I offer a 

 sketch of each. 



Several separate valves occurred off Port Kembla 63-75 fathoms. 



LEDA CRASS A, Hinds, sp. 



Stations 13, 49. 



Nucula C7'assa, Hinds, Proc. Zool. Soc, 1843, p. 99 ; Leda crassa, 

 Hanley, Thes. Conch., iii., 1860, p. 120, pi. 228, f. 69; 

 Id., Sowerby, Conch. Icon., xviii., 1871, Leda, pi. v., f. 27 ; 

 Id., Angas, Proc. Zool. Soc, 1877, p. 193 ; Id., Smith, Chall. 

 Rep., Zool, xiii., 1885, p. 237 ; Id., Tate & May, Proc. Linn. 

 Soc. N.S.W., xxvi., 1901, p. 435. 



Leda chuva. Gray, Voy. Fly, ii., 1847, p. 360, pi. ii., f. 3 ; Id., 

 Hanley, op. ciL, p. 119, f. 67 ; Id., Sowerby, op. cit., f. 46. 



Numerous separate valves were found off Port Kembla in 

 63-75 fathoms, and off Cape Three Points in 41-50 fathoms. 



LEDA DOHRNI, Hanley. 



Leda dohrni, Hanley, Proc. Zool. Soc, 1861, p. 242; L. dohrnii 

 (A.Ad.), Sowerby, Conch. Icon., xviii., 1871, Leda, pi. ix., 

 f. 54. 



Leda hanleyi, Angas, Proc. Zool. Soc, 1873, p. 174, pi. xx., f. 7. 

 Stations 29, 49. 



The specimens collected indicate that the form described by 

 Angas is the adult of Hanley's species. 



This species occurred, but more rarely than L. crassa, off Port 

 Kembla, 63-75 fatlioms ; also at 18 fatlioms. Manning Bight. 



