912 Transactions of the Society. 



a distinct npicnlns close to bonier on each side of the valve and equi- 

 distant from the processes. ]iorder hyaline, narrow. Processes 2, 

 close to the border, about U • 003 mm. broad, but high, with truncated 

 ends, and directed obliquely outwards. — 1*1. XIV. lig. 9. 

 Habitat : Kannahack, Cannibal Islands (Greville !). 



E. nebulosus. — P. nehulosus Leud-Fort., Diat. Ceyl., 1879, p. (J4, 

 pi. vii. fig. 74. 



Piam. • 12 mm. Surface slightly convex towards the border. 

 IMarkings minute, areolate, (8?) in Q- 01 mm , radial rows obscure, the 

 oblique decussating rows straight, evident ; apiculi many, prominent, 

 forming a distinct circlet close to the border, inserted at subregular 

 intervals. Processes 3, symmetrical, elliptical, with major axis at 

 right angles to corresponding radius, low. 



The appearance of the markings and processes seems to me to ally 

 this valve to Eupodiscus rather than to Pseudaiilisciis. 



Habitat : Ceylon (Leuduger-Fortmorel). 



E. parvulus Grev. MS. in Herb. Brit. Mus. 



Diam. 0*0525 to 0'0875 mm. Surface with central portion flat, 

 the slope to the border gentle. Colour pale grey to subhyaline. 

 IMarkings areolate, towards the centre 5 to 6, decreasing gradually 

 towards" the border to 8, in 01 mm., without order at the centre, 

 elsewhere in uniformly curved, radial, subfasciculate, decussating rows. 

 Border narrow, hyaline, or with faint striae, 8 in • Cl mm. I'rocesses 

 1 or 2, subcircular or subregularly elliptical, 0"0025 to 0*003 mm. 

 broad, placed close to the border, sometimes more prominent on the 

 peripheral side.— PI. XIV. Mg. 8. 



Some specimens labelled E. yunetidatus by Greville agree with 

 several others which he named E. imrimlus. 



Habitat: " Parbadoes" (Johnson! Greville!); Cambridge deposit, 

 Barbadoes (Johnson !). 



Var. concentrica. — Diam. (?). IMarkings subequal from the centre 

 to about semiradius, beyond this decreasing somewhat rapidly out- 

 wards, becoming punctiform near the border ; on the central portion 

 irregular, beyond this in evident concentric regular bands. Processes 2, 

 prominent, but small. — PI. XIV. fig. 7. 



This var. is established on an unpublished drawing by Greville, 

 now in the British IMuseum. It is distinguished from E. imnctulatus 

 by the concentric arrangement of the markings beyond the semiradius. 

 1 have found no specimens in Greville's collection corresponding to 

 the drawing, which he left unnamed. 

 Habitat : Loc. ? (Greville). 



E. punctulatus Grev., Trans. IMic. Soc. Lend., 1863, p. 73, pi. v. 



fig. 19. 



Diam. 0*08 mm. Surface slightly convex. Colour pale grey. 

 Markings punctate, smallest at the centre, soon becoming somewhat 



