of the Fishery Board for Scotland. 469 
a good deal of fibrous matter, collected in Loch Fyne on September 29th, 
1899, over eighty specimens of Monstrilla were obtained, while in 
another, collected on the 28th of November, twenty-seven specimens 
were found.* All these specimens, which appear to belong to the one 
species, I have recorded as Monstrilla (?) dance, Claparéde.t It may be 
remarked, however, that Dr. Giesbrecht seems to think that the species 
described by Claparéde is not a Monstrilla, but should be placed in the 
genus Thaumaleus.t 
In a tow-net gathering collected in Lerwick Harbour in October 
last year (1900), a specimen belonging to the group of copepods under 
consideration was obtained, but owing to some doubt concerning its 
identification it was left over for further examination. I now find that 
this specimen belongs to the genus Thawmaleus of Kroyer, and a short 
description of it follows that of MJonstriila. 
But besides the specimens alluded to above, others have been obtained 
in the Moray Firth, which have still to be examined ; but the study of 
the group is a somewhat difficult one, and the more so as some of the 
descriptions and figures of the earlier writers are sometimes wanting in 
that fulness necessary for certain identification. 
Monstrilla longiremis, Giesb, Pl. XXV., figs. 3, 4. 
1892. Monstrilla longiremis, Giesbrecht, Pelagischen Copepoden 
des Golfes von Neapel, p. 589, pl. 46, figs. 10, 14, 22, 37, 
41. 
The Monstrilla which I now record from the Firth of Forth was 
obtained in a bottom tow-net gathering collected at Station V. (to the 
west of May Island) on July 24th, 1901. The antennules (first antennz) 
are moderately elongated, but with the exception of an articulation near 
the base, the joints are very indistinct ; the setze were imperfect, and did 
not show the branched structure exhibited in Dr. Giesbrecht’s figure of 
the antennule of Monstrilla longiremis. In the general form of the body 
and of the thoracic appendages the Forth specimen agrees very well with 
the species named. The abdomen consists of four segments, but the 
articulation between the first and second is not very marked, the third 
and fourth are short and distinct. The furca are of moderate size, and 
are each provided with five sete as shown in the figure; no trace of a 
sixth seta could be observed. 
The fifth feet consist each of a short, one-jointed sub-cylindrical branch, 
the proximal half of which is somewhat delated interiorly ; each branch is 
furnished with three apical sete, the inner one being much shorter than 
the other two, and a fourth seta springs from the inner margin as shown 
in the figure. . 
From these descriptive notes on this specimen from the Firth of Forth 
there seems to be little doubt that it is identical with the species 
described by Dr. Giesbrecht under the name of Monstrilla longiremis. The 
Forth specimen certainly does not show the branching setz exhibited in 
Dr. Giesbrecht’s figure ; but this is not very surprising when it is remem- 
bered how delicate these long branching setz are, and the friction they 
may be subjected to while in the tow-net. The specimen I have described 
is a female ; no male was observed. 
* Highteenth Annual Report of the Fishery Board for Scotland, Part III., pp. 398-99, 
pl. xiii., figs. 15-20 (1890). 
+ This species has also recently been observed in a gathering from the Firth of Forth 
collected at Station V. in 1901. 
+ Pelagischen Copepoden des Golfes von Neapel, p. 578 et seq. 
