of the Fishery Board for Scotland. 4.00 
variety of that species. It differs from the typical Asterocheres echinicola 
in having the caudal segments rather shorter than the anal segment, while 
in typical specimens these are slightly longer than that segment. 
The general outline of the cephalothorax, and especially the outline 
of the posterior margin of the third segment, seem also to be slightly 
different, as shown by the drawing (fig. 33). Moreover, the outer lobe of 
the maxille is also apparently somewhat shorter than that of the same 
appendages in Asterocheres echinicola, but whether such differences are 
constant seems somewhat doubtful. 
A species of Asterocheres described by Dr. Giesbrecht, of Naples, under 
the name of Asterocheres suberites, seems to have a habitat similar to this 
Loch Fyne form, and it also agrees with the same form in having the 
caudal segments shorter than the anal segment ; indeed the difference in the 
length of the caudalsegments appears to constitute one of the principal 
points of distinction between Asterocheres echinicola (Norman) and 
Asterocheres suberites (Giesbrecht). Notwithstanding the points of agree- 
ment observed between this Clyde copepod and Giesbrecht’s A. suberites, 
I prefer for the present at least to ascribe it to the A. echinicola, Norman. 
It may also be noted that Asterocheres boecki (G. S. Brady) was occasion- 
ally obtained in the water-passages of Suwberites in company with the 
A. (2) echinicola. 
Rhynchomyzon purpurocinctum (T. Scott). 
1893. Cyclopicera purpurocinctum, T. Scott, Hleventh Ann. Report 
Fish, Board of Scot. (I11.), p. 209, Pl. TIL. figs. 29-40. 
This species, which has already been recorded from one or two 
places on the East Coast of Scotland, has only recently, and for the 
first time, been observed in the Clyde district. It occurred in the 
washings of dredged materials (weed, gravel, sand, etc.) collected in 
the vicinity of Otter Spit, Upper Loch Fyne, on January 12th, 1899, ata 
depth of about 8 to 15 fathoms. The occurrence of the species here 
would seem to indicate that though it may be, and probably is, a scarce 
one, it may be more or less generally distributed around our shores. The 
species is readily distinguished not only by its general form, but by the 
fact that it is adorned bya dark purple-coloured band extending across the 
thorax, and it is worth noting in regard to this band that a lengthened 
immersion in methylated spirits appears to have had little effect on it. 
Usually the spirit extracts the colouring matter very quickly from these 
microforms, but it would appear that in this case the purple pigment is of a 
more permanent character than that generally observed in the colours of 
copepoda. 
Artotrogus orbicularis, Boeck. 
1859. Artotrogus orbicularis, Boeck, Forh. Vid.-Selsk., Christiania, 
Du 22 Eee 
One specimen, about one millimetre in length and 0°78 millimetre in 
breadth, was obtained amongst some washings of material dredged on 
Tarbert Bank, Loch Fyne, on the 28th October last (1899). This is the 
second specimen of this rare species from the same locality.* I. C.. 
Thompson has recorded this species from the Liverpool Bay district,t but 
Tarbert Bank, Lower Loch Fyne, is the only Scottish locality I know of 
where Artotrogus orbicularis has been obtained. 
* Sixteenth Ann. Report Fish. Board of Scot. (III.), p. 272, Pl. XIV., figs. 12-21 (1898). 
+ Trans, Lit. and Phil. Soc., Liverpool, vol. viii., p. 37. 
