494 
Proceedings of Royal Society of Edinburgh. [sess. 
Tenby Bay (Boper !) ;* oyster shells, Dublin Bay (O’Meara) ; 
Mediterranean (Grunow) ; Balearic Islands (Weissflog !) ; Antarctic 
Ice Barrier, H.M.S. Challenger (Castracane). 
Var. Mejillonis. Grun., Denk. Wien. Ak., 1884, p. 82. — Diam. 
•23 mm. Markings 18 in *01 mm., central rosette with 8 large 
areolae. 
Habitat. — Mejillones guano (Grunow, Grove !). 
C. minutellus , sp. n. — Diam. *0225 mm. Surface flat. Central 
space and rosette absent ; a minute, somewhat excentric triangular 
clear area (*0025 mm. broad) with a single central dot evident. 
Markings polygonal, 10 in *01 mm., still smaller towards the 
border ; rows faintly fasciculate, subradial, the secondary oblique 
outwardly concave, decussating rows more distinct ; apiculi at the 
border prominent, at subequal intervals of *007 6 mm., or somewhat 
less.— Border narrow, hyaline. — (PI. II. fig. 5.) 
Habitat. — From Salpa spinosa, locality ? (Weissflog !). 
C. subtilis. Ehrb., Abli. Ber. Ak ., 1841, p. 412, pi. i. 3. fig. 18 ; 
pi. iii. 7. fig. 4. — Diam. *0425 to ’1125 mm. Central space and 
rosette absent. Markings polygonal, 6 to 10 in '01 mm., decreasing 
somewhat towards the border, without order on a small central 
area, elsewhere in fasciculate rows, about 12 forming each fasciculus 
at its outer extremity, and arranged parallel to the central radial 
row ; secondary oblique decussating rows evident ; apiculi sometimes 
present at the border, interfasciculate. Border striae delicate, 
faint, 12 to 14 in. ’01 mm. — Ehrb., Mikrog., pi. xviii. fig. 35, a.b.; 
pi. xxxiii. 13. fig. 4 ; pi. xxxiii. 16. fig. 7; pi. xxxiv. 7. fig. 6; 
pi. xxxv. 22. fig. 5 ; pi. xxxv. 23. fig. 5. Grev., Quart. Jour. Micr. 
Sci ., 1859, p. 81 ; Balfs in Pritch. Inf. , p. 830 ; Jan., Abh. Sch. 
Ges. vdter. Cult., 1862, Heft ii. p. 4, pi. i. A, fig. 2 ; Janisch, 
Gazelle Exped., taf. ii. fig. 8 ; iv. figs. 1, 2 ; v. figs. 5, 7 ; vi. figs. 
1, 5; xx. fig. 5; Grun., Sitzungsb. naturw. Ges. Isis., Dresden, 1878, 
p. 124; Sch., Jaliresb. d. Kom. z. Untersuch. d. deutscli . Meer, Kiel , 
1874, ii. p. 94; Sch., Atl., pi. lvii. figs. 11, 13, 28, 29 (no name); 
pi. lviii. fig. 37 (no name) ; Grun., Denk. Wien. Ak., 1884, p. 81, 
* In the collections of Dr Greville and E. Grove. 
