264 CEYLON PEARL OYSTER REPORT. 



and in the Muttuvaratu pearl oyster washings. We have pleasure in dedicating this 

 new form to our friend Mr. James Hornell, who worked with Professor Herdman 

 in Ceylon. 



The 9-jointed anterior antennae and the 2-jointed inner branch of 1st pair natatory 

 legs clearly separate this species from the genus Stenhetia, with which it in most 

 other points agrees. These characters, together with the 3-jointed inner branch of 

 2nd pair of natatory legs in the male, as well as the remarkable 5th pair in both 

 sexes, served to distinguish this species from any other genus known to us. 



Parastenhelia similis, n. sp. Plate X., figs. 8 to 14. 



Length, female 1 millim. ; male unknown. 



Has a general resemblance to P. hornelli, but differs therefrom in the length 

 of joints of anterior antenna?, in the 2nd maxillipeds, and in the 2nd branch of 

 5th natatory legs. Anterior antenna? 9-jointed, the proportional lengths of the 



. . , , . , v, 1. 2. 3. 4. 5. 6. 7. 8. 9. 



loints being as follows : n - 



J s 10. 9. 8. 7. 5. 5. 4. 2. 5. 



Hand of 2nd maxillipeds gracefully curved ; the apical claw long and stout. 



Inner joint of 5th pair of natatory legs long and wide ; laterally lined with fine 



hairs; the terminal spines plumose. Furcal rami about twice as broad as long. 



Two specimens, both females, were found in the Muttuvaratu pearl oyster washings. 



Ameira minor, n. sp. Plate V., figs. 23 to 29. 



Length, female 0'4f> millim. ; male unknown. 



Cephalothorax narrow-, 5-jointed. Anterior antennae 8 -jointed, the proportional 



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



lengths of the mints being as follows : 



& J s 5. 20 12. 8. 4. 5. 3. 5. 



The 4th joint terminates with a long narrow filament. Posterior antennae similar 

 to those of A. longipes. Mouth organs as in A. longiremis. 



Natatory legs, 1st to 4th pairs, somewhat similar to those of A. longipes. The 

 5th pair much resemble those of A. tenuicornis. 



Abdomen 5-jointed, the posterior edges of all the joints lined with minute hairs. 

 Furcal rami subquadrate, each terminating in 2 thick and 3 thin setae. 



A considerable number of females only were found in the Muttuvaratu pearl-oyster 

 washings. This is a very small species bearing a strong resemblance to the genus 

 Stenhelia, but distinctly differing from members of that genus in having the inner 

 branch of the posterior antenna? 1 -jointed. 



Ameira tenuipes, n. sp. Plate VI., figs. 15 to 20. 



Length, female 0"53 millim. ; male unknown. 



Cephalothorax 5-jointed. Rostrum short and wedge-shaped. Anterior antenna? 

 profusely setose, 8-jointed, the proportional lengths of the joints being as follows: 



