546 Transactions of the Society. 



An unsatisfactory species at the best, and seemingly compounded 

 of B. plicata and B. costata. 



It occurs sparingly at a few Stations, mostly in Area 1. 



' Challenger ' Stations are, Philippine Islands, 95 fathoms ; and off 

 Baine Island, 155 fathoms. 



Bolivina Hantkeniana Brady, plate IV. fig. 9. 



Bolivina Hantkeniana Brady, 1881, Quart. Journ. Micr. Sci., 

 vol. xxi. n.s. p. 58. B. Hantkeniana Brady, 1884, Chall. Kept., 

 p. 424, pi. liii. figs. 16-18. B. Hantkeniana (Brady) Egger, 1893, 

 Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 296, pi. viii. 

 figs. 40-42. 



The Malay examples of this species are very fine, and are subject 

 to the usual variations of form and ornamentation, but they are 

 mostly of the broadly oval modification, and are all more or less 

 costate. The aperture is very large, and is provided with the tongue 

 characteristic of the group. 



The species occurs in considerable abundance at Station 2, and is 

 found sparingly at some other Stations, but it is confined almost 

 exclusively to Area 1. 



' Challenger ' Stations are Tahiti, 420 and 620 fathoms ; off 

 Kaudavu, 210 and 255 fathoms ; off New Hebrides, 130 fathoms ; 

 and off Aru Island, 800 fathoms. 



The sole ' Gazelle ' Station is West Australia, 359 metres. 



Bolivina Karreriana Bradv. 



v 



Bolivina Karreriana Brady, 1881, Quart. Journ. Micr. Sci., 

 vol. xxi. n.s. p. 58. B. Karreriana Brady, 1884, Chall. Eept., 

 p. 424, pi. liii. figs. 19-21. B. Karreriana (Brady) Egger, 1893, 

 Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 299, pi. viii. 

 figs. 38, 39. 



In the Malay Archipelago the typical form of this species is very 

 rare, although it occurs in both Areas. 



With regard to its distribution, Brady writes, " This pretty species 

 is abundant on the Hyalonema-gvoxmd, south of Japan, 345 fathoms. 

 It occurs also in the South Pacific, at two points off Tahiti, 420 

 fathoms and 620 fathoms respectively : and in the South Atlantic, off 

 Pernambuco, 675 fathoms." 



'Gazelle' Stations are Mauritius, 411 metres; West Australia, 

 359 metres ; and Fiji, 2432 metres. 



Bolivina Karreriana var. carinata var. n., plate IV. fig. 8. 



This variety differs from the type in having the peripheral margin 

 acute or carinate, and the aperture is in every case provided with a 

 more or less projecting tongue. It is much larger than the typical 

 form. Length ■ 80 mm. 



