* . 
ioe 
XL—NOTES ON SOME GATHERINGS OF CRUSTACEA COL- 
LECTED FOR THE MOST PART ON BOARD THE 
FISHERY STEAMER “GARLAND” AND EXAMINED 
DURING THE PAST YEAR (1899). 
By Tuomas Scort, F.L.S., Mem. Zool. Soc. de France. 
(Plates XIII. and XIV.) 
The following ‘‘ Notes” are intended to supplement a somewhat similar 
series published in Part III. of the Seventeenth Annual Report. These 
netes deal entirely with the Crustacea, and refer to species that have been 
observed in various gatherings of tow-net and dredged materials examined 
during the past year, and collected for the most part on board the 
“Garland.” The majority of the species referred to have been obtained 
in gatherings collected in Loch Fyne and in the seaward portion of the 
Firth of Clyde, but a few are also from other parts of the Scottish coasts ; 
moreover, with the exception of one or two brackish-water forms those 
recorded are all marine species. 
A few of the copepods mentioned in the sequel are apparently 
undescribed, but most of the other forms have already been recorded. 
Further information concerning these has, however, been obtained bearing 
on their structural details or on the distribution of the species, which it 
will be of interest to nctice. 
My son, Mr. Andrew Scott (assisted by Mrs. Scott), has prepared 
drawings to illustrate where necessary the various objects described. 
Several forms other than those mentioned in the sequel have had to stand 
over, but these will be described later. 
CoPEPODA. 
Hucalanus crassus, Giesbrecht. 
1888. Hucalanus crassus, Giesb., Atti Acc. Lincei, Rend. (4), 
vol. iv,, sem. 2, p. 333. 
A considerable number of specimens of this species were obtained in a 
bottom tow-net* gathering collected in Dornoch Firth, November 19th, 
1898. The depth at which the tow-net was worked varied from 8 to 16 
fathoms. A large proportion of the specimens obtained were more or 
less immature. This Hucalanus has been obtained in the Moray Firth 
district on several occasions during the past few years, but it was 
apparently more frequent in the present gathering than in any of those 
previously examined. It is somewhat difficult to distinguish the 
immature forms of the species, but the adults are comparatively easily 
distinguished. When it is remembered that the distribution of Hucalanus 
crassus extends south as far at least as the Gulf of Guinea, its presence 
in the Moray Firth from time to time is of more than usual interest. 
* What is here called the ‘‘bottom tow-net” is the tow-net that is fastened to the 
ee in such a way that when the trawl is working the tow-net just clears the sea- 
ottom, 
