vine: polyzoa of the wedlock shales. 
185 
ship to A. stellatiim Nich. and Eth., but which would not upon close 
examination be mistaken for the Devonian species. 
As the authors remark (p. 466) "there appears to be two 
well-marked varieties amongst the forms which we have placed under 
A. radians. 
Var. a. Vesicles few, lobate, and larger than in h. 
Var. h. Vesicles very numerous, smaller and finer than in a, 
and the individuals always more crowded together." 
The above, then, will form another variety of A. radians Nich. 
and Eth., rather than a distinct species. 
Habitat: On crinoid stems. 
Localities: Garb, limestone group. Boghead Quarry, near East 
Kilbride; Calderwood shales (Nich. Eth., jun.; James Bennie); Hair- 
myres shales (Vine). 
Range : Though allied to the other forms of Ascodictyon refen-ed 
to above, I consider that typical A. radians is in this country at least, 
peculiarly carboniferous. As yet 1 have not found it in any of the 
English or Welsh shales or limestones. 
Genus II. — Rhopaloxaria, Uh-ich. 
Ropalonaria, Ulrich. Jour. Gincin. Soc Nat. Hist. Vol H., p. 2. 
Rhopalonaria, Vine. -^nn. Mag. Nat. Hist., Aug., 1884, p. 84, &c. 
Zoarium creeping, adnate branched, forming a close and delicate 
network. Branches linear, cells uniserial, elliptical or botelloid and 
joined together at their contracted or rounded ends. (Ulrich, slightly 
extended). 
5. Rhopalonaria botellus, Vine. PL XIL typical fig. 11, mixed 
features, fig. 12. 
R. botellus Vine. Ann. ^Mag. Nat. Hist., Aug., 1884, p. 85, 
fig. IV., 3. 
Colonial growth, either botelloid or rhopaloid in character, 
forming clusters of cells either fenestrated or free, and attached by 
their elongated or rounded ends. 
Habitat : On shells, corals, and crinoid stems. 
Localities: Typical forms, Buildwas beds, but very generally 
distributed throughout the whole of the Wenlock shales. 
