397 Part T1T.—fiighteenth Annual Report 
1896. In this species the fifth thoracic feet project outward from each 
side of the body, and are more or less conspicuous. The genus Clausia 
was established by Claperéde in 1863. Boeck, not knowing this, estab- 
lished a genus of free-swimming Copepods undera similar name in 1864, 
but in 1872 Boeck changed his “ Clausia” to ‘‘ Pseudocalanus.” 
Coryceus anglicus, Lubbock. (Pl. XIII., figs. i-14.) 
1857. Coryceus anglicus, Lubbock, Ann. and Mag. Nat. Hist. 
(2), vol. XX., Pl. XL, figs. 14-17. 
This pretty species was added to the British fauna by Sir John 
Lubbock in 1857 from specimens which had been obtained at Weymouth. 
For a considerable number of years afterwards our knowledge of the 
British distribution of the species was almost entirely limited to the 
information contained in the description which Sir John had published. 
In 1880 Prof. G. 8. Brady, by the publication of the third volume of 
his monograph of British Copepoda, was able to considerably extend the 
known distribution of our Coryceus. But though our knowledge of its 
British distribution continued to increase from year to year, there has 
apparently been no record of it from the Scottish seas till 1896, when a 
report of its occurrence in the Firth of Forth was published in Part III. 
of the Lourteenth Annual Report of the Fishery Board for Scotland. 
So far as I know, no further captures of Coryceus have been made in 
Scottish waters till the past summer, when it was taken in the Firth of 
Clyde. It occurred in a surface tow-net gathering collected in the 
vicinity of Ailsa Craig on the 29th of May. 
The presence of Corycewus anglicus in our Scottish estuaries may be 
owing to changes in the trend of oceanic currents induced by the 
prevalence of certain winds,* or it may be that the methods of research 
being now more perfect than formerly, the presence of such organisms is 
more readily detected. Several specimens of Corycceus were obtained in 
the Clyde gathering collected on the 29th of May, and some of the 
colouring of the species still remained when they first came under my 
observation. Both males and females were obtained. 
The female represented by the drawing on Plate XIII. measured slightly 
over one millimetre in length, while the length of the male, which is 
represented by one or two detailed figures on the same plate, was slightly 
less than that of the female. The female antennules are short and six- 
jointed. The proportional lengths of the joints are shown approximately 
by the formula :— 
Proportional lengths of the joints, 8°8:°8:10°'7°5 
Number of the joints, TOES Hide 26 
The antenne (fig. 3) are stout ; each is armed with a moderately strong 
and slightly-hooked terminal claw ; an elongated spine springs from the 
inner distal angle of the first joint, while one or two smaller spines occur 
on the other joints. In the male the terminal claws of the antenne are 
long and sickle-shaped (fig. 12). ‘lhe biting part of the mandible is 
armed with a few moderately loug teeth, and one or two spine-like lateral 
appendages. The palp is very small, and composed of a single one-jointed 
branch (fig. 4). The maxille are simple, one-jointed and moderately 
stout, and armed with a few short, stout, apical, and sub-apical spines 
(fig. 5). The anterior foot-jaws (fig. 6) are short and very stout, their 
structure is somewhat rudimentary, and their armature consists of several 
* My son, Mr. Andrew Scott, in a letter to me on July 28th, incidentally mentioned 
that Mr. I. C. Thompson ‘‘had been getting Corycewus anglicus in abundance off Port 
Erin, Isle of Man, a week or two ago.” That. would be nearly about the time it was 
observed in the Clyde. 
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