68 BEITISH COFEPODA. 



GENUS 10. PAKAPONTELLA, nov. gen. 



Head distinct from body. Fourth and fifth thoracic 

 segments united. Abdomen of the male 5-, of the 

 female, 3-jointed. Right anterior antenna of the male 

 provided with a hinge-joint. Secondary branch of 

 posterior antennae large, 3-jointed. Maxilla minute, 

 consisting of a large basal joint with an elongated 

 terminal palp and two small branchial processes. 

 Mandible slender and twisted, terminal teeth sharp 

 and slender, two of them much longer than the rest 

 (fig. 5) ; palp consisting of a single 3-jointed branch. 

 Anterior foot-jaw bearing at the apex about six short 

 and strong, curved, plumose spines. Posterior foot- 

 jaw composed of a basal joint of moderate size, and 

 a rudimentary 3-jointed apical portion, the basal joint 

 bearing two large curved plumose setas and two smaller 

 ones. Inner branch of first pair of feet 3-jointed, of 

 second, third and fourth pairs 2-jointed. Fifth pair of 

 feet in the female simple, two-branched ; each branch 

 composed of a single joint ; in the male, adapted for 

 prehension, and composed of one branch on the left, 

 of two on the right side. 



The species described by Sir John Lubbock under 

 the name of Pontella brevicornis appears to present 

 some characters distinct enough to require its removal 

 from the genus to which it has hitherto been assigned. 

 The 3-jointed inner branch of the first swimming foot, 



