124 THE VOYAGE OF H.M.S. CHALLENGER. 



large and much divided above, almost forming two teeth. The ligament is brownish- 

 yellow, small, not prominent, a little longer than the lunule. The muscular scars are 

 subequal, the front one a trifle the smaller, and the pallial sinus is deep, tongue-like 

 in form, parallel witli the venti'al margin, and extends half-way across the valve, just 

 reaching the central white ray. The colour of this species may be said to consist of 

 brown and white rays of different widths, the former colour predominating. One of the 

 white rays is especially remarkable, bisecting the valves in two nearly equal portions, and 

 within them is still more conspicuous as it passes through the purple-brown patch which 

 stains the upper part of the interior. The crenulation of the margin is very minute, and 

 extends only along the lower and posterior edges, the two dorsal slopes being quite smooth. 



Length 26 mm., height 19^, diameter 11. 



Habitat. — Port Jackson, Sydney, 4 to 18 fathoms (Challenger) ; Broken Bay, New 

 South Wales, on the sandy beach (in the British Museum, collected during the voyage of 

 the "Rattlesnake" in August 1847). 



Venus [Chione) ovata. Pennant. 



Vemis ovata, Peniuint, Brit. Zool., p. 206, pi. lix. fig. 3. 



Venus ovata, Forbes and Hanley, Biit. Moll., vol. i. p. 419, pi. xxiv. fig. 2, pi. xxvi. fig. 1, and 



pi. I. fig. 6 (animal). 

 Vemis ovata, Sowerby, Thesaurus, p. 718, pi. clvii. figs. 99, 100. 

 Venus ovata, Kecve, Conch. Icon., figs. 137, a, l>. 



Habitat. — Station 75, off the Azores, at a depth of 450 fathoms ; volcanic mud. 

 This species ranges from Norway to the Mediterranean. 



Vemis [Chione) scabra, Hanley. 



Venus scahra, Hanley, Eecent Biv. SheUs, p. 361, pi. xvi. fig. 24. 



Venus scahra, Sowerby, Thes. Conch., p. 718, pi. clvii. figs. 101, 102. 



Venus scabra. Reeve, Conch. Icon., figs. 97, '/, b. 



Chione scabra, Deshayes, Cat. Conch., p. 130. 



Venus (Chione) scahra, Rdmer, Mai. Bliitt., 1867, vol. xiv. p. 58. 



Habitat. — Station 233a, Kobe, Japan, in 8 to 50 fathoms ; sand. 



This species has also been recorded from the Philippine Islands and Australia. 



Ve7ius (CJiione) striatissima, Sowerby. 



Vemis striatissima, Sowerhy, Thes. Conch., vol. ii. p. 718, pi. clvii. figs. 103-105. 



Venus striatissima, Eeeve, Conch. Icon., fig. 135. 



Chione striatissima, Desliaye;*, Cat. Conchif. Brit. Mus., p. 131. 



Cliiune striatissima, Ktimer, j\Ial. Bliitt., 1867, vol xiv. p. 59. 



Habitat. — Port Jackson, Sydney, in 2 to 10 fathoms ; and Station 1G2, off East 

 Moncoeur Island, Bass Strait, at a depth of 38 to 40 fathoms. 



