898 
THE YO Y AGE OF H.M.S. CHALLENGES. 
great interest, and it is also of value for the additional light it throws on the geographical 
and bathymetrical distribution of these Crustaceans. The Anomura are represented ;it 
great depths in the ocean, specimens having been taken by the Challenger beyond 2000 
fathoms; in this respect as in general organisation they apparently occupy an inter- 
mediate position between the Brachyura and the Macrura. At more than half of the 
Stations where Anomura occurred, the depth exceeded 300 fathoms, and the groups 
containing the largest number of new species (Paguridea and Galatheadea) appear 
to have the greatest vertical distribution. 
“ The Dromidea are represented by nine species taken at various Stations, from 
shallow water to 150 fathoms; at the latter depth (Station 142, Agulhas Bank) were 
taken specimens of Dromidia bicornis, Studer, and another species apparently new. 
Several of the Dromids are protected by Sponges, or Ascidians, which partly envelop 
them, and to which they appear to be firmly fixed. 
“Few species of Homoladea occur in the collection, but at Station 196 a curious 
form, allied to Homola (perhaps referable to Homolopsis, A. M.-E.), was dredged at 
a depth of 825 fathoms. The single specimen taken is characterised by a prominent 
rostral spine, well-marked supra-orbital spines, and long slender limbs. Examples 
of the genus Latreillia occurred off Zebu, and at two Stations on the Australian 
coast at depths varying from 30 to 150 fathoms. 
“ The Raninidea and Hippidea are represented by numerous species taken principally 
in shallow water. In the former group occur several rare or little known species. The 
Japanese Lyreidus tridentatiis, De Haan, was taken off Port Jackson, Sydney (30 to 35 
fathoms), also off Kandavu, Fiji (210 fathoms); in the latter locality only a single speci- 
men was obtained, remarkable in having the spine on the fourth abdominal segment very 
pronounced. An interesting form, allied to Lyreidus, was taken off Bahia (7 to 20 
fathoms), in which the carapace has a peculiar eroded appearance in the anterior half, 
due to the presence of numerous pits and depressions; there is a prominent tridentate 
front, projecting considerably beyond the eyes, which are very minute, and the ambula- 
tory limbs are furnished with uncinate dactyli. 
“ Of the five species of Litliodidea taken by the Expedition, the best known is 
Parcdomis verrucosus, Dana, which occurred at several shallow water Stations in the 
Strait of Magellan. Two fine and distinct species of Lithodes were obtained at Station 
145 (310 fathoms), between the Cape and Kerguelen Island; the larger of these is allied 
to Lithodes maia, but has the carapace furnished with several large spines. Very few 
Anomuran Crustacea appear to have been taken by the Challenger in the North Atlantic, 
but the collection contains two young specimens of Lithodes agassizi, Smith, from 
Station 78, near the Azores (1000 fathoms). 
“The great majority of the Porcellanidea, of which there are numerous examples, 
belong to species already described and well known, and it is of interest to note that, 
