LYSIANASSA COSTJE. 
77 
shorter than their peduncles, and are naked, being un- 
furnished with either spines or hairs. The middle tail- 
scale is round at the apex, squamiform, superiorly con- 
cave, and furnished subapically on each margin with one 
solitary cilium. The structure of the skin, as viewed 
beneath the microscope, shows but a number of minute 
granules scattered thickly over the texture, while minute 
cilia are seen to spring upright from its surface. 
The animal is sometimes very transparent, verging to 
a gray along the dorsal surface, where each segment is 
marked with a white patch. The anterior portion of the 
body is tinted with yellowish brown, and one or more 
spots of the same colour exist upon each segment, and 
on some of the coxae. 
We have received specimens from Tenby, where it 
was dredged by our friend Mr. Webster, to whom we 
are indebted for Crustacea from many different localities. 
Mr. Alder has taken a single specimen on the coast of 
Northumberland. We have also taken it at Plymouth, 
and found it amongst Mr. Thompson’s Collection of 
Amphipoda, marked as having been taken at Belfast by 
Mr. Hyndman. 
The original specimen named by Prof. Milne-Edwards 
is still preserved in the Collection of the Jardin des 
Plantes at Paris, and through his courtesy and kindness 
we have been able to examine and compare it with the 
British form. The type was taken at Naples. The 
specimen in the British Museum, presented by the 
Marquis Spinola, under the name of Gammarus gloher , 
unquestionably belongs to this species. Specimens also 
which answer to the description of this species have 
been taken at Sukkertopper, near Greenland, in forty 
fathoms by Mr. Holboll. The form appears to be re- 
peated in several parts of the world ; for the species 
