393 Part I1T.—Eighteenth Annual Report 
(?) Tetragoniceps malleolata, but, for the reasons stated below, I prefer to 
lescribe it under a distinct name rather than as a “variety” of the 
species referred to; for, after all, the question as to whether a thing is a 
‘‘ species” or a ‘‘ variety” is very much a matter of opinion. 
Description of the Female.—In general appearance the female of 
Tetragoniceps brevicauda is not unlike the form just described, but is 
somewhat smaller. The specimen figured (fig. 18) is only about ‘7mm. 
(about =4 of an inch in length). ‘The antennules have a structure 
somewhat similar to those of (?) Tetragoniceps malleolata, and there is 
the same hook-like process on the distal extremity of the first joint ; the 
proportional lengths of the nine joints are, however, somewhat different. 
The mouth-organs and swimming-feet resemble those of the species named, 
except that the first feet appear to be rather more slender, and the fifth 
pair are proportionally somewhat smaller, but the secondary joint of the 
fifth pair is distinctly more elongated proportionally than that of the fifth 
pair in (?) Tetragoniceps matleolata (fig. 21). The caudai segments (fig. 22) 
are distinctly shorter than those of the species named, and they are also 
proportionally stouter ; the size and form of the caudal furca of the species 
under description are so different from those of the closely allied form 
previously recorded as not only to have suggested the name that has. 
been applied to it, but were the chief characters that first attracted my 
attention when examining the material in which it was found. 
No males of this form and only very few females have been observed. 
Habitat.—Firth of Forth, off St. Monans. 
Pseudolaophonie spinosa (1. C. Thompson). 
1893. Laophonte spinosa, I. C, Thompson, Revised Report on the 
fb of Liverpool Bay, Trans. L’pool. Biol. Soc., vol. 
. p24, Pls XO igs; 13. 
1896. omni aculeata, A. Scott, Report Lancashire 
Sea Fisheries (1895), p. 11, Pl. IIL, figs. 7-23. 
This rare copepod species occurred in a gathering of dredged material 
collected near Otter Spit, Loch Fyne; a male and a female specimen 
were obtained. The antennules in this species are each furnished with a 
prominent and strong spine on the lower (exterior) aspect of the second 
joint; both the male and female possess these spines; the female 
antennules appear to be only four-jointed. The species has a close 
general resemblence to Laophonte, so much so that, like Mr. [. C. 
Thompson, I was at first inclined to regard it as a member of that genus, 
but a close examination of the thoracic appendages, and especially of the 
swimming-feet, bring to light structural differences that must exclude it 
from the genus Laophonte. The principal differences, as pointed out by 
Mr. A. Scott, are observed in the structure of the second and third pairs 
of swimming-feet. Im the second pair each foot consists of a single one- 
jointed branch, and in the third pair, though each foot is two-branched, 
both branches are only two-jointed. This interesting and somewhat 
anomalous copepod has not before been recorded from the Ciyue SSI, 
Leptopsyllus minor, T. and A. Scott. 
1895. Leptopsyllus minor, T. and A. Scott, Ann. Scot. Nat. Hist. 
(Jan, 1895), p. 31, Pl. IL, figs. 15-22. 
This species belongs to a group of peculiarly sleuder copepods, the 
first of which was added to the British fauna in 1894.* Hitherto all the 
* Part IIL. of Twetfth Ann. Report of the Fish. Board for Scot. (1894), p, 254. 
Ss 
