WHERE THE FOOD THERE THE FEEDERS 201 
of a solid lash, but it is explained to mean ‘ the absence of 
a lash.’ 
Willemoesia, Grote, 1875, was at first named Deodamia 
by Dr. v. Willemoes Suhm, but that name was pre- 
occupied. Here the eye-stalks are rudimentary, not lodged 
in a notch in the dorsal surface of the carapace, but in the 
frontal space. The first antennze have the first joint pro- 
duced to a scale-like process, which is forced up into a 
crest-like ridge ; the two flagella are very unequal. The 
trunk-limbs are all chelate in both sexes. The telson 
tapers to a joint. The type species, Willemoesia lepto- 
dactyla (vy. Willemoes Suhm), occurs in the Mediterranean, 
Atlantic, and Pacific between the depths of 1,300 and 
2,225 fathoms. This and the species of the kindred genera 
are almost always taken on an oceanic floor of globigerina 
ooze, and Mr. Spence Bate infers from this that the cha- 
racter of the food may have been one of the most perma- 
nent influences in their geographical distribution. The 
remark is capable of a very extended application. 
Family 2.—Nephropside. 
The carapace is sub-cylindrical, with a pronounced 
rostrum. ‘The second antennz have a long multiarticulate 
flagellum. The segments of the pleon are dorsally imbri- 
cated. The outer branch of the uropods has a transverse 
suture. The ‘mastigobranchiz’ or epipodal plates are 
large, havinga well-developed podobranchial plume attached 
to all the trunk-legs except the last pair. 
- ix genera are assigned to this family. Spence Bate 
calls it the Homaride, from Homarus, the name which 
Milne-Edwards gave to the genus containing the common 
lobster, but since that genus was already named Astacus 
by Leach, Homarus must be discarded as a synonym. 
Since a freshwater genus in a different family has been 
misnamed Astacus, by which the application of Astacidze 
as a family name has been confused, it seems better to 
give a new family name to the lobsters, and for this pur- 
pose Nephropsidee readily suggests itself. 
