COPEPODA. 271 



the combined lengths of the cephalic and thoracic portions. Furcal rami small, 

 longer than broad. 



A few specimens were found in the washings from the Mnttnvaratu pearl oysters. 



D. robusta differs from other species in the structure of the anterior antennae, and 

 the 1st and 5th natatory legs. 



Dactylophusia laticaudata, n. sp. Plate XT., figs. 1 to R. 



Length, female 0*6 millim. ; male unknown. 



A small flat species of a yellow colour, resembling in general appearance D.flava, 

 When only recently preserved, the 1st, 2nd, and 3rd thoracic segments present a 

 band of deep brown madder colour; this band eventually disappears in spirit- 

 specimens, and only the general colour remains. Anterior antenna? 6-jointed, short 



. , t , 1. -2. 3. 4. 5. G. 



and robust ; the proportional lengths are : 



lo. 12. J. o. J. 4. 



Secondary branch of posterior antennae 2 -jointed ; basal joint very short ; 2nd joint 

 long. Mandible as in D. tisboides; palp with 2 nearly equal branches. The lower 

 branch is furnished with 2 strong spines situated in the middle of the external 

 margin. Maxilla and 1st maxilliped resembling those of D. tisboides. Second 

 maxilliped long and narrow, both surfaces slightly rounded ; terminal claw very 

 strong. Outer branch of 1st natatory legs 3-jointed, very short ; inner branch has a 

 long and very wide 1st joint and one small terminal joint ; 2nd, 3rd, and 4th legs 

 resembling in general those of the genus ; the terminal spines have ring-like 

 markings. The 5th legs have the primary joint large and foliaceous, much longer than 

 broad, with 5 short, stout terminal spines ; secondary joint small with 2 strong 

 spines on the outer margin, 2 terminal ringed spines and 1 small spine on the inner 

 distal margin. Abdomen 4-jointed, very wide. Furcal rami small and tumid. 



Several specimens of this curious species were found in the Muttuvaratu pearl 

 ovster washino-s. 



Dactylophusia semula, n. sp. Plate XL, figs. 9 to 12. 



Length, female - 4 millim. ; male unknown. 



In general appearance very like D. laticaudata, but smaller and less robust. The 



colouring is the same as in that species. 



Anterior antennae narrow, 7-jointed. The proportional lengths of the joints are 



.. 1. 2. 3. 4. 5. G. 7. 



as follows : 



13. 12. 10. 11. 4. 3. G. 



Posterior antennse, mandible and palp, maxilla and maxilliped as in D. laticaudata. 



The 1st to 4th natatory legs resemble those of D. laticaudata, except that the basal 



joint of the inner branch of the 1st is less tumid. The 5th legs in this species also 



have the primary joint large and foliaceous, but proportionally broader than long, and 



