210 
GAMMARIDiE. 
rior pair of caudal appendages are half as long again as 
the preceding. The telson is long and lanceolate. 
The specimen from which this description is taken 
was communicated to us by the Rev. Geo. Gordon, who 
took it in the Moray Frith, and has been described in the 
article in the “ Quarterly Journal of the Geological So- 
ciety” above referred to, as the nearest approach, among 
recent Crustacea, to a fossil species found by Mr. Kirkby 
in the magnesian limestone of Durham, and described by 
him in the same work for 1857 (page 2\ 4) under the 
name of Prosoponiscus prohlematicus, Schlotheim. 
The fossil species differs from the recent forms in this 
subfamily, in two circumstances. The eyes are promi- 
nent upon the surface, like those of some Isopods , and 
the anterior and deeper segments of the tail decrease in 
depth posteriorly, a condition which belongs to some 
species among the Hyperiidce ; thus exhibiting additional 
evidence that the relation between the Phoxides and 
HyperiidtB is closer than that between the latter and the 
Gammarides. 
