[Reprinted from the Twenty-fourth Aunual Report—Part [II.—of the 
Fishery Board for Scotland, 1905 ; published 21st November 1906.] 
IX.— NOLES ON NEW AND RARE COPEPODA FROM THE 
| SCOTTISH SEAS. 
By Tuomas Scort, LL.D., F.L.S., Mem. Soc. Zool. de France. 
. 
(Plate XIV.) 
PRELIMINARY Note. 
The following are a few notes and drawings of rare Entomostraca that 
have been held over from previous papers on Scottish Crustacea, published 
from time to time in the Reports of the Fishery Board for Scotland. 
I am indebted to my son, Mr. Andrew Scott, A.L.S., for the drawings 
with which these notes are illustrated. 
Genus Amphiascus, G. O. Sars (1895). 
Amphiascus Catharine, T. Scott, sp. n. Pl. xiv., figs. 1-9. 
Description of the female:—Body robust, somewhat similar 
to Amphiascus minutus (Claus); Rostrum moderately elongated 
(fig. 1); length, ‘74mm. (34 of an inch). 
Anterior antenne slender, reaching to about the end of the cephalo- 
thoracic segment, and composed of eight joints; the first, fourth, and last 
joints of moderate length, the others small, as shown by the formula (see 
also fig. 2). 
Proportional length of the joints, 160718. ,9- 1404.97 * 6° 1 
Numbers of the joints, - - AL 7 ls Sa a 
Posterior autenne stout, two-jointed, and furnished with a moderately 
elongated and three-jointed outer ramus (fig. 3). 
Mandibles tolerably stout, apex trnncated and armed with several teeth 
of unequal length ; palp well developed, basal part moderately stout and 
setiferous, and provided with two small branches, as shown in the 
drawing (fig. 4). 
Second maxillipeds small, second joint moderately narrow and fringed 
with minute sete; the end joint very small but armed with a tolerably 
large terminal claw (fig. 5). 
First pair of thoracic legs slender, both branches triarticulate, inner 
| branch with first joint narrow, considerably elongated, and apparently 
‘ with only a few minute sete near the proximal end of the inner margin 
‘ and a small hair near its distal extremity ; the two end joints very short 
and armed with a stout terminal claw and a tolerably large seta; there are 
also a few smaller setz, as shown in the drawing. Outer branch about 
two-thirds the length of the first joint of the inner, the middle joint is 
rather longer than the first and fully twice as long as the third ; these 
joints have the outer margin setiferous and are also furnished with Icng 
spines on the outer distal angles (fig. 6). 
