MOLLIFCA FKOM EIGHTY FATHOMS — HKDLKV. 30.") 



set, sharply pointed grains l)e.sti-e\v the surface of the shell. 

 Hinge edentulous. Length, 3-7o ; height, 2-5 ; depth of single 

 valve, 1*4 mm. 



A few separate valves represent a genus new to the Australian 

 fauna. Judging from illustrations L. (ihijssicoJo, Sars,''- is nearest, 

 and differs by Ijeing larger and higher in pi'oportion to its length. 

 Another single valve was dredged by Mr. G. H. Halligan and 

 myself in 100 fathoms off Wollongong. 



VKIiTlCORDIA VADOSA, ^J^. 11,0V. 



(Plate hi., figs. 34, 35, 36, 37). 



Shell small, rather solid, compressed, equilateral, sub-circular, 

 sub-spiral. Umbo projecting. Lunule deeply excavate. Sculp- 

 ture : about ten low, broad, undulating radial ribs ; except the 

 umbo, which is smooth, the entire surface is densely covered 

 with minute radially-disposed elevate grains, which increase in 

 size towards the margin ; interior nacreous, margin smooth. 

 Height, 2-65 : length, 2N ; d(*pth of single valve 0-8 mm. 



The species is represented by four separate valves in this col- 

 lection. Another odd valve was taken by Mr. G. H. Halligan 

 and self in 100 fathoms off' Wollongong. 



This opportunity is taken of withdrawing the name Vrrticordia 

 rhomhoidca proposed*' for a recent shell. I unfortunately failed 

 to observe that Prof. Tate had already chosen this name for a 

 Tertiary fossil." 



Though related, the fossil appears from the description to differ. 

 To avoid confusion 1 now beg to sulistitute Verticordia 

 spfo.m as the name of the New Zealand shell. It has already 

 (ante p. 2lo) been recorded from this coast. 



Yerticohdia australiensis. Smith. 



Verticordia nnMralie)isi.-<, Smith, Chall. Rep., Zool., xiii., 1885, p. 

 167, pL XXV., f 6, C^h. 



(Plate hi., figs. 38, 39). 



Half-a-dozen mutilated valves correspond to the figure and de- 

 scription of the species taken by H.M.S. "Challenger" in 155 



S2 Sars— Moll. Reg. Aret. Xorvegiae, 1K7H, pi. 20. f. 5. 



:« Hpclley-Tmns. X. Z. Tn^^t., xxxviii., HK)") (1906), j). 71, pi. ii., f. 12, i:?, 



14." 

 .•ii Tate— Trans. Rov. Sot-. S. Aiistr., ix., I.ss6 (1SS7), p. 149, ])1. xiv., f. U. 



