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The abdomen is composed of five segments. The combined length of the abdomen and 
furca is contained almost three times in the total length of the cephalothorax, from the frontal 
margin to the base of the genital segment. The furcal joints are nearly symmetrical (Plate LIII, fig. 1). 
The left antennule is composed of nineteen joints, and extends to the end of the second 
thoracic segment. The middle joints of the right antennule are much inflated. They are furnished 
with three very strong and forked processes. The proximal hinge joint has a large saucer-like 
process with blunt teeth. The distal hinge joint is short. The upper margin is furnished with 
two simple plates (Plate LIII, fig. 4). 
The antennae, mandibles, maxillae and maxillipedes are of the usual Pontel/a type. 
The endopodite of the first pair of feet is three-jointed. 
The second, third and fourth pairs of feet are of the normal Pov/e//a structure. 
The fifth pair of feet is rather small. The thumb-like process on the first joint of the 
exopodite of the right foot is long and spiniform. The distal portion is curved inwards. There 
is no process on the middle of the joint. The claw-like joint is long and curved. It is furnished 
with one apical and three marginal spines. The end joint of the exopodite of the left foot has no 
apical spines. The outer margin of the joint is furnished with three small spines (Plate LIU, fig. 7). 
Female unknown. 
The male of this species is very similar to the male of Poxtella denticauda, but it is 
easily separated by the remarkable forked horns on the right antennule, and by the structure 
of the fifth pair of feet. 
Occurrence. — Two specimens were found in the plankton collected at Station 93. 
8. Pontella ceramt nov. sp. Plate LIII, figs. 8—15. 
Male — length 3,45 mm. 
Viewed from above, the body appears elongate and moderately robust. The cephalic 
segment is furnished with side hooks, and a pair of dorsal eye lenses. The last thoracic segment 
is symmetrical, and both sides terminate in spiniform projections. The points are slightly divergent 
(Plate LIII, fig. 8). The rami of the rostrum are short, and the basal part is provided with a 
well defined circular lens (Plate LIII, fig. 9). 
The abdomen is composed of five segments. The combined length of the abdomen and 
furca is contained fully three times in the total length of the cephalothorax, from the frontal 
margin to the base of the genital segment. The furcal joints are moderately long, and are nearly 
symmetrical. 
The left antennule is twenty-four-jointed, and extends to the middle of the third thoracic 
segment. The middle joints of the right antennule are greatly swollen. The upper margin of 
the first swollen joint is furnished with a strong curved spine. The upper margin of the proximal 
hinge joint has a strongly serrate lamella. The second and third teeth are much longer than 
any of the others (Plate LIII, fig. 12). The outer part of the upper margin of the distal hinge 
joint is furnished with two serrate plates. One of the plates has a double row of teeth (Plate 
LIII, fig. 13). The end of the joint is produced into a short stout spine. 
The antennae, mandibles, maxillae and maxillipedes are of the usual Portela type. 
163 
