464 Proceedings of Royal Society of Edinburgh. [sess. 
Habitat , — Franz Josefs Land (Grunow) ; Ascidia, Kinsale 
(O’Meara !). 
Yar. punctifera, Gran, ibid., p. 84. — Diam. *1 mm. Markings 5 
to 9 in *01 mm.; apiculi absent or minute, a distinct point — the 
rudiment of a bristle — between the central and one of the surround- 
ing areolae. 
Habitat. — Southern Ocean (Grunow). 
Yar. hyalina, nov. Eupodiscus excentricus, O’Meara, Quart. Jour. 
Micr. Sci., 1867, p. 245, pi. vii. fig. 2. — Diam. about -035 mm ; a 
broad hyaline band adjacent to border ; apiculi many, inserted at 
middle of this hyaline band at subequal intervals. 
Habitat. — Dredged off Arran Islands, co. Galway (O’Meara). 
Yar. zebuensis, nov. C. zebuensis , Grun. MS. — Diam. *0275 to 
•07 mm. Markings towards the centre 4 or 5, decreasing outwards 
to 8 in *01 mm., a large prominent central nodule ; apiculi distinct, 
numerous, close to border at intervals of about *0075 mm. Border 
sharply defined. 
Habitat. — Campeachy Bay (Grove !), Zebu, Philippine Islands 
(Weissflog !). 
C. decipiens, Grun. Denk. Wien. Ah., 1884, p. 85. — Diam. ’024 
to ’03 mm. Markings polygonal, decreasing uniformly but some- 
what rapidly from the centre outwards ; at the centre 5 to 6, towards 
the border 10, in ’01 mm.; secondary oblique decussating rows 
concave outwards, subarcuate; apiculi many, minute but distinct, at 
short unequal distances. — Yan Heurck, Syn. Diat. Belg., pi. xci. 
fig. 10 ; Yan Heurck, Typ. Syn. Diat. Belg., Ho. 471; C. excentricus, 
var. 1 ? decipiens, Grun., Sitzungsb. naturw. Ges. Isis., Dresden, 1878, 
p. 28 ; pi. iv. fig. 18; C. minor , Anglor (non Ehrb.); Orthosira 
angulata , Greg,* Trans. Roy. Soc. Edin., 1857, p. 498, pi. x. figs. 
43, 43 b ; C. minor, W. Sm., Syn. Brit. Diat,, i. p. 23, pi. iii. fig. 36 
(excl. C. decipiens, Grun.; Sch. Atl., pi. lix. figs. 18, 19.) 
Distinguished from C. excentricus by the more irregular markings, 
which decrease more towards the border, and by the more prominent 
apiculi. 
* “ Melosira angulata , Gr eg,” fide Grun., ibid., 1884, p. 85. 
