700 Transactions of the Society. 



Discorbina patelliformis Brady. 



Discorbina patelliformis Brady, 1884, Chall. Eept., p. 647, pis. 

 lxxxviii. fig. 3, lxxxix. fig. 1. D. patelliformis (Brady) Egger, 

 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 390, pi. 

 xv. figs. 48-50. 



Is not uncommon at Station 2, and occurs at Station 6, both 

 in Area 1, but has not been observed at any other Station. 



Brady states, " Is not uncommon amongst the islands of the 

 Pacific, at depths of 6 to 150 fathoms. It has been observed also 

 in shallow-water dredgings from the shores of Ceylon, Madagascar, 

 the Mauritius and Malta." 



The ' Gazelle ' localities are Cape Verde, Mauritius, and Western 

 Australia. 



Discorbina tabemacularis Brady. 



Discorbina tabemacularis Brady, 1881, Quart. Journ. Micr. Sci., 

 n.s., vol. xxi. p. 65 ; and Chall. Kept., 1884, p. 648, pi. lxxxix. 

 fi<?s. 5-7. D. tabemacularis (Brady) Egger, 1893, Abhandl. k. 

 bayer. Akad. Wiss., CI. II. vol. xviii. p. 390, pi. xv. figs. 58-60, 79. 



In the Malay Archipelago this is a very rare form, and the 

 examples are small and thin-shelled. It occurs at Stations 2, 6 

 and 14, in Area 1 ; and at Station 17 in Area 2. 



Brady says that it is a minute coral-reef species, and names 

 several localities where it has occurred at depths of from 2 to 255 

 fathoms. 



Egger reports it from Mauritius, 75 and 225 fathoms ; and from 

 Western Australia, 44 fathoms. 



Discorbina corrugata sp. n., plate VII. fig. 5. 



Test, conical ; base, flat or concave ; peripheral margin acute. A 

 series of sharp ridges extends from the apex to the base of the 

 test, the spaces between the ridges being excavated. The um- 

 bilical region either hollow, or filled up with granular matter 

 beyond which are minute radiating striae which extend to the 

 peripheral margin. Shell-substance dense, obscuring the sutures 

 on the superior face of the test. Diameter, • 28 mm. 



The above is an incomplete description of an interesting form, 

 of which there are only two (more or less damaged) specimens 

 available for examination. The polygonal shape of the superior 

 face is, however, sufficient to distinguish it from any other species 

 of Discorbina. The number of convolutions, and the form of the 

 chambers, cannot be determined ; but there are indications that the 

 ridges mark the centre of the chambers, and that 'the junction of 



