500 
Proceedings of Royal Society of Edinburgh. [sess. 
around the border, minute, 15 to 16 in *01 mm. ; rows fasciculate, 
the fasciculi consisting of 8 to 10 rows, their sides almost straight 
or more curved ; apiculi interfasciculate, minute, inserted at inner 
edge of marginal hand. — C. ( curvatulus , var.?) divisus , Grun., Denk. 
Wien. Ah ., 1884, p. 83, pi. iv. (D), fig. 16). 
In 1878 Grunow distinguished as var. arcuata specimens with the 
edges of the fasciculi somewhat bent, those of the type being straight. 
Habitat. — Peruvian guano, on Macrocystis and Lessonia from the 
coast of Peru (Grunow). 
G. Normani , Greg., in Grev., Quart. Jour. Micr. Sci ., 1859, p. 
80, pi. vi. fig. 3. — Diam. *0625 to *1125 mm. Surface slightly con- 
vex. Central space and rosette absent. Markings polygonal, about 
8 in '01 mm., decreasing somewhat towards the border; rows radial, 
fasciculate, converging slightly towards the periphery, towards the 
border 6 rows composing each fasciculus ; apiculi absent or 
minute. Border with delicate striae of closely placed punctiform 
markings. — Janisch, Gazelle Exped., taf. v. fig. 6 ; G. fasciculatus ; 
Sch.,* Jahresb. d. Kom. z. Untersuch. d. deutsch. Meter., Kiel , 1874, 
ii. p. 94 ; Sch., Atl., pi. lvii. figs. 9, 10; Odontodiscus subtilis , Grun., 
in Sch., ibid., 1874, p. 95 ; C. subtilis, var. Normanii , Van Heurck, 
Syn. Diat. Belg ., p. 218; C. normanicus , Van Heurck, ibid., Ex- 
plan. pi. cxxxi. fig. 1; in Van Heurck, Typ. Syn. Diat. Belg., Ho. 
532 ; G. subtilis, Ehrb., Eul. Diat. Sp. Typ., No. 115 (fide Van 
Heurck); C. curvatulus, var. Normanii, Cleve, Vega Exped. Vetensk. 
Jakttag. Stockh., 1883, Bd. iii. p. 488. 
An undulation of the surface, resulting from greater prominence 
of the lines between the fasciculi, as referred to by Greville, is not 
constant. Well-preserved specimens of G. fasciculatus , Sch., show 
indications of minute processes. 
Habitat. — Ex Ascidiis, Hull (Norman) ; Boundstone Bay, co. 
Galway (O’Meara) ; Dutch rushes from Holland (?) ; Arran Islands, 
co. Galway (O’Meara); Cuxhaven (Schmidt); marshy ground, Wedel 
(Grunow) ; locality? (Kinker !); Richmond tunnel (O’Meara !); Hol- 
stein (Van Heurck !); [Richmond, Va. (Rae !) ; Californian guano 
(Norman !);+ Arafura Sea, H.M.S. Challenger (Doeg !). 
* Not C. fasciculatus, O’Me., Quart. Jour. Micr. Sci., 1867, p. 245, pi. 
vii. fig. 1. 
t In the collection of Dr Greville. 
