CHARACTERISTIC DEEP-SEA TYPES. — CRUSTACEA. 39 
little-known genus Cymopolia, of which no less than eight spe- 
cies are recorded from depths varying from 50 to 300 fathoms. 
Cymonomus quadratus and Cymopolus 
asper represent two new species with the 
carapace projecting in a 
sharp rostrum in front. 
The latter species, taken ; 
in 75 to 150 fathoms, MN 
has normally developed Fig. 231. —Oyclodorip- 
o ita eyes, while in the former, P*"iid» i. Ser 
nitida 2. (S.I Smith.) taken in 200 to 500 fathoms, the eye-stalks 
are immobile spiny rods tapering to obtuse 
tips without visual elements; so that we may trace here, as it 
were, the mode of disappearance of the eyes in different groups 
of crustaceans.! The most remarkable species referred to this 
group is Corycodus bullatus, of which an imperfect specimen 
was taken between 175 and 250 fathoms. It has a somewhat 
pentagonal thick and very swollen carapace, covered with flat- 
tened tubercles resembling small rods. 
Among the great number of new forms of Anomura (crusta- 
ceans intermediate between crabs and lobsters), none is more 
striking than the great spiny Lithodes Agassizü. (Fig. 232.) 
It is of a light pink color. Specimens have been taken with 
the carapace nearly seven inches long and more than six inches 
broad, and with the outstretched legs over three feet in extent. 
The whole integument of this magnificent species is very smooth, 
but the spines upon the carapace and legs are of needle-like 
sharpness, so that the greatest care is needful to handle even 
dead specimens without wounding the hands. Considering the 
pugnacious habits of crabs, it must be a formidable enemy among 
the members of its class. The spines are greatly elongated and 
very slender in young specimens, giving them an appearance 
very unlike that of the adult. This species was taken in 450 to 
800 fathoms; it extends from the southern coast of New Eng- 
land to thát of South Carolina.” 
1 In the Pyenogonid the shallow-water 2 Arctic species and genera were found 
species have four eyes; the deep-water by the * Blake" far south of their sup- 
species none, or only rudimentary ones. posed range; the genus Lithodes was 
