Mr. C. Spence Bate on a new Genus of Macrura. 67 
are examined it is found that the leaf-scars of Cyclostigma 
contain three cicatricules similar to those of Bothrodendron. 
EXPLANATION OF PLATE IV. 
Fug. 1. Sigillaria discophora, Konig, sp., nat. size. la. Leaf-scar en- 
larged and showing the three cicatricules. Loc. Shale over 
Whistler Seam, Bonnington Pit, Kilmarnock. Communicated 
by the Rev. David Landsborough. Hor. Lower Coal-measures. 
Figs. 2-4, Bothrodendron Wiikianum, Kidston, n. sp. 2. Loc. Little 
Whickhope Burn, near first branch above Cross Sike, North- 
umberland ; nat. size. 2a. Leaf-scar, enlarged. Hor. Calci- 
ferous Sandstone Series. Communicated by Mr. H. Miller, 
F.R.S.E. 3. Loc. Railway-cutting between Kates Mill and 
Boags Mill, Water of Leith, Midlothian. Hor. Calciferous 
Sandstone Series. Collected by Mr. J. Bennie. Nat. size. 
Specimen in the Collection of the Geol. Survey of Scotland. 
3a. Leaf-scar, enlarged. 4. Zoc. Shore, Wardie, Midlothian. 
Hor. Calciferous Sandstone Series. Nat. size. Collected by 
Dr. J. M. Macfarlane. 4a. Leaf-scar, enlarged. 
Figs. 5-G. Bothrodendron minutifolium, Boulay, sp. 5. Loc. Shale over 
Whistler Seam, Bonnington Pit, Kilmarnock. Hor. Lower 
Coal-measures. Nat. size. Communicated by the Rey. D. 
Landsborough. 5a. Leaf-scar, enlarged. 56. Subepidermal 
cicatricules, enlarged. 6. Loc. Shale over “ Barnsley Thick 
Coal,’ Monkton Main Colliery, near Barnsley, Yorkshire. 
Middle Coal-measures, Collected by Mr. W. Hemingway. 
Nat. size. 
X.—On a new Genus of Macrura (Ophthalmeryon 
transitionalis). By C. Spence Bare, F.R.S. 
[Plate IX.] 
Some short time since a small and much battered Crustacean 
was sent to me by Mr. George Merritt, with the request that 
I would inform him what it was. It proved to be new, and I 
propose to call it Ophthalmeryon transitionalis. 
Unfortunately the specimen had been swallowed by a dol- 
phin, and had therefore been affected somewhat by the gastric 
juices of the fish’s stomach. Having been preserved in 
a dry condition, it was consequently very brittle and not in 
a state fit for examination. I therefore placed it for 
several weeks in a preparation of glycerine &c. to preserve 
and soften its texture before subjecting it to the risk of obser- 
vation. 
Its general appearance is that of a small Brachyurous 
Crustacean somewhat allied in form to alia in its dorsal 
aspect. The carapace is about 9 millim. long and: as many 
5? 
