54. S. I. Smith—Crustacea of the Albatross Dredgings. 
-oms; three species of a remarkable new genus allied to 
Pasiphaé, and also to Hymenodora and some other genera of 
Paleemonidz, which shows that Pasphaé is closely allied to the 
Paleemonide ; a large Penzid, a foot in length, referred to the 
little known genus Aristeus; and a large Sergestes three inches 
in length. 
The great size of some of these new species of shrimp is 
remarkable, but is far exceeded by two of the previously 
described crabs. Geryon quinguedens, from 105 to 588 fathoms, 
is one of the largest Brachyurans known, the carapax in some 
specimens being five inches long and six broad, while one spe- 
cimen of the great spiny JLithodes Agassizii measures seven 
inches in length and six in breadth of carapax, and the out- 
stretched legs over three feet in extent. 
Among the Schizopoda there are two large species of Gnath- 
Sako one over four inches in length, and a Lophogaster, all 
rom below 2000 fathoms. One of the most interesting Schiz- 
opods is a small Thysanoessa (a genus of Euphauside) from 398 
to 1067 fathoms, of which one female was found carrying eggs. 
e eggs are carried in an elongated and flattened mass beneath 
the cephalothorax, are apparently held together by some glu- 
tinous secretion, and are attached principally to the third pair 
of perseopods (antepenultimate cephalothoracic appendages). 
This apparently confirms Bell’s statement in regard to the egg- 
carrying of Thysanopoda Couchii, which is, as far as I know, 
the only published observation of egg-carrying in any of the 
Euphausidee. 
istinct varietal differences due to depth in any species, though 
there is often a very marked change in the associating species. 
