1888 - 89 .] Mr John Battray on the Genus Coscino discus. 477 
the rows in the intervals slightly hent, oblique, and decussating ; 
the hand adjacent to the border sub-regular, with punctiform striae 
8 to 10 in *01 mm. Apiculi on border at intervals of ‘005 to 
*0075 mm.; the single large apiculus with a knob-like free end, 
inserted at inner edge of band adjacent to the border, about 
*0055 mm. long. — (PI. II. fig. 3.) 
Habitat. — Gazelle Exped. (Weissflog !). 
§ Y. Fasciculati, Grun., Denk. Wien. Ak ., 1884, p. 80; Pant., 
Fossil. Baeil. Ung., p. 71. 
Markings fasciculate, the fasciculi sometimes indistinct, or re- 
cognisable only on outer portion of valve, the rows composing 
each parallel to that at its centre or side ; apiculi frequent. 
C. vetustissimus. Pant., Fossil. Baeil. Ung., p. 71, pi. xx. fig. 186. 
— Diam. ‘075 to ‘1 mm. Central space and rosette absent. A small 
slightly excentric nodule, distinct. Markings hexagonal, increasing 
slightly to about the semiradius, again decreasing somewhat to the 
border, towards the centre and border 5, at the semiradius 4J, in 
*01 mm., central papillae distinct; irregular, on a small subcircular 
somewhat excentric area, about *006 mm. broad, and surrounded by 
an indistinct narrow, irregular, hyaline hand; elsewhere in obscurely 
fasciculate suhstraight or in suhradial rows, those in each fas- 
ciculus parallel to that at one of its edges, and most obvious when 
the papillae are in pairs ; non-apiculate. Border narrow, indistinct ; 
striae delicate, 8 to 10 in ‘01 mm. — Cleve and Moll., Diat ., Nos. 57, 
155, 162, 164; Grun., Bot. Centralbl ., Bd. xxxiv. Nos. 2, 3, p. 35 ; 
C. incequalis, Grove and Sturt., Jour. Quek. Mic. Cl. } 1887, p. 68. 
—(PL II. fig. 17.) 
In the fasciculation this species recalls C. curvatulus , hut is 
distinguished by the excentric arrangement of its markings. It 
approaches C. africanus, var. wallicliiana , Grun., in the latter 
respect, but Grunow’s var. is non-fasciculate. In the excentric 
arrangement of the much smaller markings, as well as in their sub- 
fasciculate disposition, this species may be easily distinguished 
from C. nodulifer , Janisch. 
Habitat. — Oamaru deposit (Grove ! Cleve!); Yokohama(Schmidt) ; 
Cambridge deposit, Barbados (Kinker ! Johnson!); Bichmond, Ya. 
