NARRATIVE OF THE CRUISE. 
901 
a Paguricl with a completely calcified cephalo-thorax; the short abdomen exhibits 
only traces of segmentation, and the ultimate appendages are symmetrical and well 
developed (see fig. 329). 
“ The Galatheadea form a large and interesting portion of the collection, and several 
species extended to great depths. Examples of the genus Munida, many of which 
are new to science, were taken at various depths from shallow water to 600 fathoms, 
in all the great oceans explored; the occurrence of a species at Station 113*a, off the 
Brazilian coast (7 to 20 fathoms), with the rostral spine distinctly serrated, is of 
interest. The genus Galathea appears to be confined to comparatively shallow water, 
reaching its limit at 100 fathoms, hut specimens of the allied Diptychus, apparently a 
deep-sea representative of Galathea, were got from considerable depths down to 600 
fathoms. The deep-water forms present many points of interest, and several of them 
belong to genera lately described by the naturalists of the recent American and French 
deep-sea expeditions. The eyes are almost invariably devoid of pigment, and are 
apparently functionless; in some cases the ocular peduncle is prolonged into a spine, 
while the convex cornea still remains on its outer surface. In a single specimen from 
Station 196 (825 fathoms), the eyes are represented only by a single spine on either 
side, in front of the peduncle of the external antenna. The beautiful Galatheid 
figured ( Ptychogaster milne-edwardsi, fig. 330) was dredged at Station 310 (400 
fathoms); it differs from the only other known species, Ptychogaster spinifer, A. M.-E., 
and Ptychogaster formosus, A. M.-E., in having all the abdominal segments furnished 
with spines on the dorsal aspect.” 
