342 
Genus VIL — Myxastrum, Haeckel. 1 
(Sec above, p. 123.) 
Generic character. — A simple shapeless protoplasm-body 
(without the formation of vacuoles), which protrudes simple or 
ramifying and anastomosing processes, Reproduction by radial 
fission. The encapsuled resting body divides into a great 
number of longish germs, whose longitudinal axis is radially 
directed towards the centre of the globular cyst. Each sepa- 
rate germ surrounds itself with a siliceous covering. The germs 
issuing from these spore-coverings at once assume the form of 
the full-grown organism. 
Species. — Myxastrum radians , Haeckel. 
Plate X, figs. 13—24. 
Protoplasm-body in the freely moving condition, usually 
of the shape of a radiating ball, of very tough consistence, of 
0'3 — 05 mm. diameter. Pseudopods very tough and stiff, 
ramifying sparingly, with few anastomoses. Foreign bodies, 
Diatomacepe, Peridinia, &c., are engulphed by the pseudo- 
pods, and drawn into the central body. Resting condition, 
a globular cyst of 008 mm. diameter. The contents divide 
into numerous siliceous-shelled spores of 003 mm. length, 
0 - 015 mm. breadth, whose longitudinal axes are radially 
directed towards the empty centre of the globular cyst. 
Locality. — Beach of the harbour of Puerto del Arrecife, 
the port of the Canary Island Lanzarote, 1867. 
Enumeration of Micro-lichens parasitic on other 
Lichens. By W. Lauder Lindsay, M.D., F.R.S.E., 
F.L.S. 
{Continued from page 146.) 
Genus XY. — Acolium, Ach. Mudd, 253. 
Species 1. A. corallinum, Hepp. 
Syn. Cyphclium, Hepp, 531. 
Trachylia, Hepp. 
Sclerococcum sp/uerate, Fr. 
Celidium furfuraceum, Anzi. 
1 pv%a utrTpov, slime-star. 
