476 
Proceedings of Royal Society of Edinburgh. [sess. 
Ocean, H.M.S. Challenger (Rae! Cleve and Moller !) ; Patagonia 
(Cleve and Moller!); Patagonia, 1375 fathoms, H.M.S. Challenger 
(Cleve !). 
Yar. fasciculata, nov. — Diam. ‘2 to - 28 mm. Similar to the type, 
but markings in fasciculi, the rows in each parallel to that at its 
centre, the fasciculi few and wide, or numerous and narrow. 
The fasciculi when wide resemble those of C. polyradiatus , Cstr., 
but the border is quite unlike that of the latter. 
Habitat — Surface, Antarctic Ocean, H.M.S. Challenger (Rae!); 
Gazelle Expedition (Weissflog !). 
G. leptopus, Grun. Van Heurck, Syn. Diat. Belg ., pi. cxxxi. 
figs. 5 and 6. — Diam. *1 mm.. Central space absent. Markings 
hexagonal, decreasing but slightly at the border, and showing 
numerous round granules ; towards the centre 4, towards the border 
5 in *01 mm.; on a narrow irregular zone adjacent to the border 
minute round, granular ; the oblique decussating rows sub-straight, 
evident ; apiculi well defined, forming a circle close to the border 
at subregular intervals of about *005 mm., one larger inserted 
somewhat farther inwards. Border sharply defined ; striae delicate 
8 to 10 in *01 mm. — Cleve and Moll., Diat., No. 114; Janisch, 
Gazelle Exped ., taf. v. fig. 4; C. lineatus , Sch., Atl ., pi. lix. fig. 26; 
C. macraeanus , Grun. (non Grev.), fide Sch., Atl., ibid. 
The large apiculus is not unlike that of Podosira oliverana, 
Grun. (Yan Heurck, ibid., pi. cxviii. fig. 5), found abundantly at 
Kerguelen by H.M.S. Challenger. 
Habitat . — Off Ascension Island, S.S. Buccaneer (Grove!); 
Mascara (Cleve and Moller!); Californian guano (Greville!); Patos 
Island guano (Greville !); Mejillones guano, Balearic Islands (Yan 
Heurck); Santa Marta deposit (Doeg!); Los Angelos (Cambridge!); 
Macassar Straits (Grove!). Trawled by H.M.S. Challenger, lat. 
34° 37' N., long. 140° 32' E. (Rae!); Indian Ocean soundings, 
Capt. Pullen, 2200 fathoms (Greville !). 
Yar. discrepans, nov. — Diam. 475 mm. Markings hexagonal, at 
the centre of the valve an inequilateral 4-sided area, bounded by a 
narrow irregular band of dissimilar angular areolae, which are con- 
tinued outwards unequally from the angles towards the border; 
