1888-89.] Mr John Rattray on the Genus Coscinodiscus. 669 
band adjacent to the border subradial, with few anastomoses or 
lateral rami, and sometimes dichotomous ; apiculi at the angles of 
the meshes sometimes distinct. Border narrow, hyaline, more 
rarely broad, with evident striae. 
§ 1. Circulares. 
Outline circular. 
L. fur catus. Grove, MS.' — Circular. Diam. *0875 to - 095 mm. 
Surface slightly convex. Markings prominent, areolae at centre 
few, large, unequal, sometimes triramose, and reaching -06 mm. in 
length, mostly 1 to 1J in ’01 mm.; adjacent to border the lines 
straight or curved, radial, or subradial, frequently dichotomous, hut 
without anastomoses ; the areolae hyaline, or with minute rounded 
granules at their centre. Border delicate, hut distinct, about 
•0025 mm. broad.— (PL III fig. 23.) 
Habitat . — Marine deposit, Fiji Islands (Grove !). 
L. capensis. Cleve, Kongl. Sv. Vet.-Akad. Handl. StocJch., 
1881, Bt. xviii. FTo. 5, p. 22, pi. v. fig. 61. — Circular. Diam. 
•04 mm. Markings irregularly radiating or oblique, sometimes 
ramose, but not anastomosing lines, with large hyaline interspaces; 
at intervals a few rounded, elongate or irregular dots distinct. 
Border sharply defined; striae obvious, 15 in -01 mm. 
Cleve places this species with some hesitation in the present 
genus, believing that it might be better to range it in Cyclotella. 
The relationships, however, which he points out with Cy. striata, 
Kiitz. (Van Heurck, Syn. Diat. Belg., pi. xcii. figs. 6-8), and 
Gy. dallasiana, W. Sm., are remote, whilst the general aspect of the 
lines on the surface is liradiscoid. 
Habitat . — Cape of Good Hope (F. Hauck). 
L. barbadensis. Grev., Trans. Micr. Soc. Lond., 1865, p. 5, 
pi. i. fig. 14.— Diam. -05 to *105 mm. Surface slightly convex for 
\ to £ of radius, beyond this almost flat to the border. Markings 
evident areolae, from 1 to 3 in "01 mm., sometimes obtusely 
angular, the band adjacent to the border subregular. 
Habitat . — Cambridge deposit, Barbados (Johnson !); “Barbados!” 
(Greville ! Johnson !). 
