792 Proceedings of Royal Society of Edinburgh, [sess. 1904-5. 
A Report on the Free-Swimming Crustacea found in the 
Firth of Clyde, 1901 to 1902. By Thomas Scott, 
LL.D., F.L.S., etc. Communicated by Sir John Murray, 
K.C.B., F.R.S. 
(MS. received April 26, 1905. Read June 5, 1905.) 
Introduction. 
The material upon which this report is based was collected by 
Mr Alexander Gray, curator of the Biological Station at Millport. 
The tow-nettings were specially taken for Mr E. T. Browne, to 
aid his investigation of the Medusae of the Firth of Clyde. After 
the material was examined by Mr Browne, all the Crustacea were 
forwarded to me for identification. 
In 1902 most of the tow-nettings were taken off the Cumbrae 
Islands, within a limited area between the northern and southern 
extremities of the two islands. 
The temperature of the sea, the mesh of net, etc., are given in 
Mr Browne’s “Notes on the Pelagic Fauna” (pp. 781-782). 
Notes on the Crustacea mentioned in the Table for 1901. 
Table I. 
The collection examined in 1901 consisted of twenty-nine 
plankton samples. Seven of these samples were collected in 
April, ten in May, three in June, seven in July, one in August, 
and one in September. Moreover, seven were from the neigh- 
bourhood of Little Cumbrae ; one was collected off Largs and off 
Loch Ranza ; one in Lamlash Bay and in Inch Marnoch Sound, 
and also in Loch Striven and Loch Long ; all the others were 
from the vicinity of Greater Cumbrae. 
Seventeen species of the Crustacea observed in these samples 
belonged to the Copepoda, four to the Cladocera, and one each to 
the Isopoda and Amphipoda. Several groups of Crustacea were 
also represented in their larval or post-larval stages. 
