COPEPODA. 269 



the inner joint ovate ; those of the male similar but smaller. Furcal rami sub- 

 quadrate, about twice as long as broad, a thick chitinous band lining the inner edges. 

 Ten males and 5 females were found in the Muttuvaratu pearl oyster washings. 

 The dentated thoracic and 1st abdominal segments, the 2nd maxillipeds, the male 

 2nd natatory legs, and the furcal rami clearly distinguish this species. 



Dactylophusia havelocki, n. sp. — Plate IX., figs. 11 to 18. 



Length, female 1 millim. ; male unknown. 



Anterior antennae short, 8-jointed, the joints short, length and breadth of each 



nearly equal. Fourth joint bears a long narrow filament, and the proportional 



, . . . 1. 2. 3. 4. 5. 6. 7. 8. 



lengths or the loints are : — - — „ „ n — - — — — 



& J 9. 8. 5. 6. 3. 4. 2. 6. 



Mandible palp 2-branched, secondary branch small, distinctly 2-jointed. Hand of 

 2nd maxilliped rounded on one side, flat on the other ; claw slender. Natatory legs 

 similar to D. dentata ; the inner branch of the 5th pair however is nearly quadrate 

 instead of ovate. Furcal rami nearly twice as broad as long ; basal portion of apical 

 spines thick and jointed. 



A few specimens, all females, were found in the Muttuvaratu pearl oyster washings. 

 The short anterior antennae and furca, coupled with the shape of the mandible jialp, 

 and the inner joint of the 5th natatory legs, characterize this species. 



Dactylophusia hirsuta, n. sp. — -Plate IX., figs. 19 to 24. 



Length, female 1"2 millim. ; male unknown. 



All the segments of the abdomen covered with rows of fine short hairs. Anterior 

 antennae 9-jointed, the 4th joint bearing a long filament. 



The proportional lengths of the joints are as follows : - 



1 1 & J 14. 14. 7. 10. 3. 5. 4. 3. 9. 



Basal joint of 2nd maxilliped has a row of small hairs near apex, and three terminal 

 plumose setae ; hand small ; the claw 2-jointed, long and narrow. 



Inner branch of 1st pair of natatory legs as in D. dentata, but with shorter 

 terminal spines ; 5th pair not unlike those of D. dentata, but the length and 

 armature of the setae are distinctly different, and each joint has a pellucid patch on 

 its surface. Furcal rami very short and hirsute. 



Three specimens, all females, were found in the Muttuvaratu pearl oyster washings. 

 The 9-jointed anterior antennae, the hirsute abdomen, 2nd maxillipeds and furca, 

 and the 5th pair of natatory legs serve to distinguish this species. 



Dactylophusia ceylonica, n. sp. — Plate IX., figs. 25 to 32. 



Length, female 1"3 millim. ; male 0"96. 



Posterior dorsal edges of thoracic and abdominal segments have each a row of fine 



