COPEPODA. 293 



Posterior antenna 1 -branched. Mandible stylet- shaped ; palp 1 -jointed. Maxilla 

 represented by a stout plumose spine. Maxillipeds as in Asterocheres. First pair of 

 natatory legs each composed of two 1 -jointed branches, the outer branch very small ; 

 2nd and 3rd pair 2-branched, both 2-jointed ; 4th pair 1 -branched, having 2 joints. 

 In 5th pair each consists of a lamella. 



Stephopontius typicus, n. sp. — Plate XX., figs. 19 to 31. 



Length, female 6'7 millims. ; male 8 millims. 



Second thoracic segment in female has a terminal lateral appendage on each side ; 

 this is absent in male, which has a prolongation of the last thoracic segment on each 

 side of the abdomen. The 1 -jointed abdomen in female has a small protuberance 

 on each side at the genital opening. Male abdomen 3-jointed, very small. 



Anterior antenna of female 6-jointed, the proportional lengths being as follows : — 



j- ,* S g 4 g l * The terminal joint bears , long filament. 



Posterior antenna 4-jointed, the apical joint bearing a broad spine with wide trifid 

 end. Other characters as in the genus. Furcal rami very small, spherical in male ; 

 knob-like in female. A number of specimens, both males and females, of this 

 very striking form were found in the general washings from dredged Invertebrates. 

 Its general appearance, the male anterior antennae, and the 1st, 2nd and 5th natatory 

 legs prevent its being mistaken for any other known species. 



Family: ERGASILID^E. 



Bomolochus scomberesocis, Kr. 



One adult female with 2 larval forms attached to vulva was taken from the mils 

 of Caranx leptolepis from Aripu, Ceylon. 



Bomolochus unicirrus, Richiardi. 



Several specimens, male and female, were found in the gill chambers of Amphisile 

 scutata, Linn., from Ceylon. 



Family: CALIGID^E. 



Caligus dakari, Van Beneden. 



Several specimens were taken from the mouth of Arius venosus caught in Palk Bay, 

 Ceylon. 



Caligus diaphanus, Nordmann. 



Several were found about the mouth and attached to the dorsal fin of Thereupon 

 pii/a from Aripu, Ceylon. 



