46 COCCOPHYCER. 
Celastrum cambricum. Archer Micro. Journ., 1868, p. 65. 
Cells rounded on the exterior margin, each bearing a single 
truncate tubercular process. 
- In pools. 
“Tt was obtained by Mr. Archer on his visit to Wales, and is not re- 
ferable to either of the remaining forms (besides C. sph@ricum) as 
described by Nageli, though perhaps showing most affinity with C@las- 
trum cubicum, but differing in each cell possessing but one process, or 
tubercle-like appendage, not three. These likewise showed various con- 
ditions of the growth of the younz coenobia within the mother-cells from 
the earliest stage, the most minute of which showed the full character 
of the cells, each with the truncate tubercle-like process.”’—Quart. 
Journ. Miero. Soc., 1.c. 
Celastrum microsporum. (Ndg.) Braun Alg. Unic. p. 70. 
Cells 8-16 or 32, exactly spherical, containing a single globule ; 
interstices small, 
Size. Ccenobium -04 mm. diam. ; cells -009 mm. diam. 
Micr. Journ., 1868, p. 65. Pritchard’s Infus. f. 755. 
In bogs and pools. 
“The group (ccenobium) is formed of rather large cells, externally 
globalarly rounded, their margins, where in mutual contact, being 
straight, and leaving at the angles exceedingly minute, somewhat tri- 
angular interspaces, like very minute pores, leading into the central 
cavity characteristic of the forms appertaining to this genus.”-—Archer. 
Genus 31. STAUROGENIA. Kutz. 
Ccenobium cubical, hollow within, formed of 4-8-16 quad- 
rate or sub-quadrate cells. Propagation by quiescent gonidia, 
produced after the subdivision of the cell-contents.—Rab. Alg. 
Eur. iii. 80. 
Crucigenia, Morren in Ann. des Sci. Nat., 1830, t. 20, p. 
404. 
Staurogenia rectangularis. Braun Alg. Unic. p. 70. 
Cells oblong-oval, 4-16-64, associated in tabular families, 
almost twice as long as broad, angles obtusely rounded. 
Size. Cells 0075 x ‘004 mm. 
Archer in Quart. Journ. Micr. Sci., 1875, p. 206. 
In pools. 
Plate XVIII. fig. 3. a, families X 400; 6, magnified 800. 
Genus 32. SORASTRUM, Kutz. (1845.) 
Ceenobium globose, solid within, free swimming, formed of 
4-8-16-32 compressed wedge-shaped cells, which are sinuate, 
emarginate, or bifid at the apex, and radiately disposed. Pro- 
pagation unknown.—fabh. Alg. Eur. iii. 81. 
