258 THE ANTARCTIC MANUAL. 
stations were close together. One small complemental male was 
found. The depth was 1375 fathoms in the one case, and 1600 
fathoms in the other. (vii.) Se. antarcticwm, Hoek, is the most 
southern species taken by the Challenger, and was represented by a 
single specimen. It was dredged at station 153 at a depth of 1675 
fathoms. Very like it is (viil.) Se. tenwe, Hoek, taken at station 146 
and at a depth of 1375 fathoms. Complemental males were found 
in this species. Another new species (ix.), Sc. flavum, Hoek, was 
taken at the same spot. 
At station 317, near the Falklands, four specimens of Verruca 
gibbosa, the largest and most beautiful of the deep-sea species, were 
taken. Balanus levis, Brug., which seems to be peculiar to the 
Straits of Magellan, was dredged from a muddy bottom some 10-15 
fathoms deep. Slightly altered forms, however, creep up the western 
coast of America. The different individuals adhere together, and 
form a globular mass. (x.) B. corolliformis, Hoek, a very remarkable 
Balanus, with an allied form in the Farée Channel, was found along 
with Se. recurvirostrum, and its shell was covered by an encrusting 
growth of Polyzoa. 
Very few, if any, of the Rhizocephalous Cirripeds were brought 
back by the Challenger, but the occurrence of Peltogaster is recorded 
in the naturalists’ book. 
It has been pointed out that the occurrence of the genera Scalpellum 
and Verruca in the great depths of the ocean coincides in a striking 
way with their paleontological history ; but on the other hand there 
is no instance of specific identity, and the oldest known fossil 
Cirripede is Pollictpes, which is not known from any great depth. It 
is a widely distributed littoral form, and none of its seven species 
occur at a greater depth than 10 fathoms. 
Order IV.—LEPTOSTRACA. 
Until the Chailenger expedition, this extremely interesting order 
—which occupies an intermediate position between the Entomostraca 
and the Malacostraca, combining in its members some of the charac- 
teristic features of each sub-division—was represented by the single 
genus Nebalia. The Challenger added two new genera, Paranebalia 
and Nebaliopsis, to the order, each represented by a single species. 
(1.) Nebalopsis, typica, Sars, was taken, in a fragmentary state, at 
station 146 between Prince Edward Island and the Crozets. It is 
again recorded from a depth of 2550 fathoms from station 289, about 
midway between New Zealand and Chili. . 
