SOME COPEPODA NEW TO BRITAIN. 37 
is in the caudal terminations (figs. 1 and 2), which in D. 
longiremis are somewhat long and angular, but in D. dis- 
caudatus are short and rounded. This is, perhaps, the 
most readily recognizable difference between the two 
species. In both, the terminal spines of the swimming 
feet (fig. 4) are long, slender and sword shaped, and finely 
serrated on the inner border. The swimming feet, © 
including the fifth pair, are of the same general shape and 
character in both species, but here again the spines are 
plumose in D. discaudatus and plain in D. longiremis. 
This is specially noticeable in the female (fig. 5). 
The remaining species to be here noted is Pontella 
wollastont, Lubbock. This was first described by Sir 
John Lubbock in 1857, and probably agrees with the 
P. heligolandica of Claus, described in his “ Die freileben- 
den Copepoden,” in 1863. It appears not to have been 
taken in England during the past thirty years, and it was 
therefore with a thrill of pleasure that I welcomed a 
considerable number of this large and peculiarly striking 
Copepod in the gatherings taken by the tow-net in the 
‘“Weathercock’”’ expedition of 28th August, 1886, about 
half way between Liverpool and Isle of Man. 
The general appearance of the animal is shown in 
mie Vi, fis. 1. It is one of the very largest of the 
British Copepoda, and, like the somewhat allied species 
Anomalocera patersonit, is conspicuous by a strong curved 
hooked spine on each side of the anterior portion of the 
cephalothorax. These are not illustrated by Brady in his 
drawings of either species, but his drawing of Pontella 
heligolandica was, as he says, taken from a mutilated 
specimen preserved in spirit. 
The leaf-like appendages to the basal segments of the 
cephalothorax, as noticed in Hurytemora hirundo, are 
present also in the females of this species, and are no 
