448 Part ITI.—Twentieth Annual Report 
naturalists to study the invertebrate fauna of the Forth estuary, and a 
considerable number of species of Crustacea, including several Schizopods, 
were made known to science, yet none of these investigators appears to 
have noticed Erythrops goesii, G.O.S. (= E. erythrophthalmus, Goes). 
Now this Schizopod, though probably one of the largest of the 
species belonging to the genus rythrops, is under half an inch 
in length, and might on account of its small size be overlooked 
by an ordinary observer, but, like its confréres, it possesses eyes 
of such a brilliant red colour as to make the little creature quite conspicu- 
ous even in a crowded tow-net gathering, especially if the gathering be 
examined soon after it is collected ; it is therefore scarcely likely that this 
Erythrops would have escaped being noticed by naturalists so experienced 
as Goodsir, Henderson, Leslie, and others, had it been present in any of 
their collections. Other and less conspicuous Schizopods were recorded 
by these early investigators: then why not this one? When, on the other 
hand, we turn to the work of the Fishery steamer ‘‘Garland,” as described 
in the various Annual Reports of the Board, we find that mention is made 
of Hrythrops as early as Octoler 3rd, 1888, when it was obtained in a 
bottom tow-net gathering collected at Station V.,* while in a paper on 
the fauna of the Firth of Forth published in 1889 Hrythrops goesii is 
described as ‘frequent all over the Forth from Inchkeith to May 
Island,”+ and as being new to Britain ; but since that time it has been 
found to be of moderately common occurrence, especially in the part of 
the Firth described above. The question which naturally suggests itself 
here is—Was the recognition of Hrythrops in the Firth of Forth in 1888, 
and every year since, the result of a recent migration of the species, or 
had it simply been overlooked by former observers ? 
The second example is even more interesting than the one just referred 
to—viz., the occurrence of Calocaris macandree in the Firth of Forth. 
Calocaris was for a long time considered to be a rare species and to have 
a very limited distribution; subsequent investigations have shown, how- 
ever, that its distribution is not so restricted as it was formerly believed 
to be; but till as recently as the past summer it had never been known 
to occur in the Firth of Forth, notwithstanding the fact that the Crus- 
tacean fauna of that estuary has been very carefully examined by the 
various methods of tow-netting, dredging, and trawling, as well as by the 
examination of the organisms contained in the stomachs of fishes captured 
within its limits. About the end of May of the present year (1901), when 
the Fishery steamer “‘Garland” was engaged in carrying on some special 
work, a number of specimens of the Crustacean referred to were obtained, 
along with several other organisms, at Station I[I.—to the east of Inchkeith 
—in asmal]l-mesh net which was being employed for the capture of small 
fishes ; and it was also about the same time obtained in the stomach of a 
Long Rough Dab, Drepanopsetia platessoides, from about the same place. 
Other specimens of Calocaris were obtained by Mr. Pearcey, the Naturalist 
on board the “Garland,” in the stomachs of large Witch Soles, 
Pleuronectes cynoglossus, captured on the 28th of June and 15th July at 
Station V.—to the west of May Island—in 25 to 27 fathoms. These 
various captures of Calocaris within such a short time would almost 
warrant the belief that this Crustacean was not uncommon in the Firth of 
Forth ; and should that be found to be really the case, the fact that no 
trace of the species had been noticed by any previous observer is of con- 
siderable interest. Of course, if the species be of true fossorial habits— ~ 
and any evidence we have concerning it seems to support such a con- 
* Seventh Annual Report of the Fishery Board for Scotland (1889), Part III., p. 57, 
+ Op. cit., p. 322, 
