352 



chestnut brown; and is 6*3 mm. long, 5 mm. high, and 3*8 

 mm. in section. 



Uah. — Type, 130 fathoms off Cape Jaffa, with several 

 valves; 90 fathoms, two alive and eighty-four valves; 300 

 fathoms, many valves; 110 fathoms off Beachport, six valves; 

 150 fathoms, twenty-four valves; 200 fathoms, twenty-three 

 valves; 104 fathoms, thirty-five miles south-west of Neptune 

 Islands, one alive, and many fresh valves. 



Diagnosis. — It is most like Venericardia himaculatay 

 Deshayes; but is a more delicate shell, has more and nar- 

 rower ribs, which are much more closely and finely scaled. 

 The same features distinguish it from V. quoyi, Desh., and 

 F. difficilis, Desh. 



Type in Dr. Verco's collection. 



Carditelia exulata, E. A. Smith. 

 Carditella exulata, E. A. Smith; Challenger Rep., Zool., 1885, 

 vol. xiii., p. 215, pi. xv., f. 6, 6a. Type locality. — "Off Nightin- 

 gale Island, Tristan d' Acunha, 100 to 150 fathoms." JJim. — 

 Length 4 mm., height 2'75, width 2 mm. 



Our shells were taken in 130 fathoms off Cape Jaffa, four 

 valves; 110 fathoms off Beachport, six valves; the beach at 

 MacDonnell Bay in shell sand, many valves and one living 

 individual; and at Kingston, Lacepede Bay, shell sand, many 

 valves. I cannot detect any specific difference between these 

 examples and Mr. Smith's, from his description and figure, 

 except that ours are smaller, measuring 2'8 mm. by 1'8 mm. 

 Some valves have the posterior part internally and the region 

 of the lateral teeth stained brown. Tristan d' Acunha lies in 

 about 12 deg. west longitude, and 37 J deg. south latitude, 

 in the middle of the Atlantic Ocean. Beachport is in about 

 139J deg. east longitude, and 37| deg. south latitude. The 

 latitude in which the type shells and ours were taken is, 

 therefore, exactly the same; as is also the depth, 100 to 150 

 in the one case, and 110 in the other. These two circum- 

 stances might to some extent explain their identity. It will 

 be noted, however, that most of our specimens were taken 

 on the beach, where also the only living individual was 

 secured. If the identification is correct, the distance be- 

 tween the two stations of 162 parallels of longitude, which 

 at that latitude may be computed as about 9,000 miles, is 

 very interesting. 



Carditella subtrigona, Tate. 



Carditella suhtrigona, Tate, Trans. Roy. Soc. S. Austr., vol. 

 ix., p. 70, pi. iv., f. 10. Type locality. — Streaky Bay, Great Aus- 

 tralian Bight; Tate, op. cii., vol. xiv., p. 268. 



Dredged alive at all depths from 17 to 24 fathoms in 

 Gulf St.' Vincent, Investigator Strait, and Backstairs Pas- 

 sage, as far out as Newland Head. 



