166 Proceedings of the Royal Physical Society. 
situated well behind the middle of the carapace, they are, 
in the young of 0. capensis, exactly in the middle, and in the 
young of the other species ‘25 mm. nearer to the anterior 
than the posterior margin. 
DESCRIPTION OF PLATE. 
Fig. 1. Newly-born Opisthophthalmus sp., from ventral surface. The basal 
joints of the anterior limbs have been pulled apart to show the 
mouth, m; x 4. 
2. Dorsal view of same specimen; x 3. 
3. Dorsal view of Opisthophthalmus capensis; x 4. 
Fig. 4. Tail segments of O. capensis. 
ig. 5. Embryo of O. capensis, dorsal surface; x 7. 
6. Embryo of 0. capensis, side view. ce, solid cord of cells terminating 
the follicle. 
Fig. 7. Embryo of 0. capensis, side view of cephalothorax, the follicle being 
removed. 
Fig. 8. Right chelicera from same embryo, viewed from inside. , chitinous 
plate. 
XIII. Report on a Collection of Marine Dredgings and other 
Natural History Materials made on the West Coast of 
Scotland by the late George Brook, F.L.S. By THOMAS 
Scott, F.LS., Mem. Soc. Zool. de France, Naturalist 
to the Fishery Board for Scotland. [Plate V.] 
(Read 15th January 1896.) 
On the 4th of October last year (1894) my friend, Mr F. 
G. Binnie, formerly assistant to the late Mr George Brook, 
wrote to me concerning a collection of marine dredgings 
and other material that had been made by Mr Brook at 
various places on the West Coast of Scotland. Mr Binnie, 
with consent of Dr Woodhead, one of Mr Brook’s executors, 
suggested that I might undertake the examination of the 
material, and, if found sufficiently interesting, prepare a 
report on the results of the examination of it. In the letter 
referred to, Mr Binnie says, “ Amongst the material that 
