i6 3 



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 cep halothorax, from the frontal 

 margin to the base of the genital segment. The furcal joints are nearly symmetrical (Plate LUI, fig. i). 



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 infiated. They are furnished 

 with three very strong and forked processes. The proximal hinge joint has a large saucerdike 

 process with blunt teeth. The distal hinge joint is short. The upper margin is furnished with 

 two simple plates (Plate LUI, fig. 4). 



The antennae, mandibles, maxillae and maxillipedes are of the usual Pontella type. 



The endopodite of the first pair of feet is three-jointed. 



The second, third and fourth pairs of feet are of the normal Pontella structure. 



The fifth pair of feet is rather small. The thumbdike 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 clawdike 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 LUI, fig. 7). 



Female unknown. 



The male of this species is very similar to the male of Pontella denticanda, 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 ccrami nov. sp. Plate LUI, figs. 8 — 15. 



Male — length 3,45 mm. 



Viewed from above, the bod}- 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 LUI, fig. 8). The rami of the rostrum are short, and the basal part is provided with a 

 well defined circular lens (Plate LUI, 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 cep halothorax, 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 LUI, 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 doublé row of teeth (Plate 

 LUI. fig. 13). The end of the joint is produced into a short stout spine. 



The antennae, mandibles. maxillae and maxillipedes are of the usual Pontella type. 



163 



