248 LIVERPOOL BIOLOGICAL SOCIETY. 
as a few of these and no other adult males and a large number 
of D. bradyi—all females or immature males, and no other 
species of female—have been taken together in Colwyn Bay 
on more than one occasion, it 1s impossible to suppose 
that they can be other than the same species. Prof. G. O. 
Sars, to whom I sent specimens, has been good enough to 
inform me that he was misled by a damaged specimen of 
D. spinosa in referring to it as its female D. echinata, 
Bate.* He adds, ‘‘I now regard your identification of 
D., spinosa as the adult male of L). brady: to be most likely 
correct.”” The immature male attains its full growth 
before acquiring the spinous pleon of the adult, this being, 
until the last moult, even less spinous than in the female. 
7. Pseudocuma cercaria, van Beneden. 
Very abundant in sand; Colwyn Bay. 
8. Cymadocea emarginata, Leach. 
Spheroma rugicauda, Leach. 
These were found together in a dead Balanus shell, a 
circumstance which lends support to Hesse’s opinion that 
Spheroma is the female of Cymadocea.t 
9. Astacilla longicornis, Sow. 
Arcturus longicornis, Bate and Westwood. 
Two specimens were taken, one at low-water with the 
young (which, being cream-coloured, contrasted strongly 
‘with the dark brown parent) attached to the long outer 
antenne, as described by Bate and Westwood, by their 
hind legs. They sometimes lett their perch and returned 
to it after swimming about. This species has been re- 
corded from the mouth of the Dee by Mr. Byerley. 
10. Metopa rubro-vittata, G. O. Sars. 
This appears to be rather a common species in Colwyn 
Bay. Two or three specimens were beautifully and 
* “ Challenger” expedition, Zoology, Report on Cumacea, p. 50. 
+ Ann. des Sciences Nat., 5th ser,, vol, xvii., p. 1, &c. 
teat 
