COPEPODA. 277 



Pseudanthessius chelifer, n. sp. — Plate XIV., figs. 12 to 18. 



Length, female 1 millim. ; male unknown. 



Cephalothorax 6-jointed, ovate. Abdomen 4-jointed, the 1st joint swollen and 



rounded anteriorly, narrowing to base. Anterior antennae 7-jointed, the proportional 



- , . ■ , • M1 1. 2. 3. 4. 5. 6. 7. 



lengths of the joints being as follows : 16- 2 4, 8. 21. 16. 12. 12. 



Posterior antennae 3-jointed, the apical joint having 3 long terminal spines and a 

 long broad curved terminal claw dentated on upper side. Mandible small, anteriorly- 

 extended into a serrated spine ; palp large, having 3 terminal spines. The 1st 

 maxilliped narrow, ending in a denticulate spine and a smaller lateral spine. The 

 2nd maxilliped consists of a long narrow curved joint having 2 small lateral spines and 

 3 terminal spines. Inner branch of 4th pair of natatory legs consists of one small 

 narrow joint with terminal spine. Furcal rami about 3 times as long as broad. 



Several specimens, all females, were found about the pearl banks. A very distinct 

 species, readily recognized by its posterior antennae, the 2nd maxilliped and the 4th 

 pair of natatory legs. 



Pseudanthessius concinnus, n.sp. — Plate XIV., figs. 24 to 30. 



Length, female 0*85 millim. ; male unknown. 



Cephalothorax ovate, similar to P. gracilis, but considerably smaller. Abdomen 



5-jointed. Anterior antennas 7-jointed, the proportional lengths of the joints being as 



1. 2. 3. 4. 5. 6. 7. 



follows : 



10. 24. 8. 16. 16. 12. 7. 



Posterior antennas nearly as in P. gracilis. Mandibles consist of a curved joint, 

 tumid in centre, with narrow, blunt termination. First maxilliped 1-jointed, long, 

 narrow towards apex, with strong lateral and terminal spines. Second maxilliped 

 2-jointed, the first joint rather longer than broad ; terminal joint very small with 

 2 strong apical spines. Both branches of 1st pair of natatory legs 3-jointed ; inner 

 branch of 4th pair 1-jointed with truncate base terminating in large serrated lanceolate 

 spine and one plain spine ; outer branch 3-jointed, having serrated lanceolate spines. 

 Furcal rami long and narrow. 



One specimen only, a female, was found in the general washings from Ceylon 

 Invertebrata. 



The mouth organs, the inner branch of 4th pair of natatory legs and the furcal 

 rami are the distinguishing features of this species. 



Pseudanthessius liber (Brady and Kobertson). 

 Found amongst the general washings of Invertebrates from the pearl oyster beds. 



Liekomolgus minor, A. Scott. 

 Found at 2 stations only, and far apart, viz., between Port Said and Suez, and 

 amongst the washings of young pearl oysters, Ceylon. 



