262 CEYLON PEARL OYSTER REPORT. 



Abdomen broad, the joints mostly quadrate, posterior margins devoid of setae. Furcal 

 rami short and broad, produced downwards on inner edges ; terminal setae as in 

 S. longicornis. 



Several females were found in the washings from Muttuvaratu pearl oysters. 



This species in many of its characters resembles other members of the genus, 

 without agreeing with any one in all respects. The jointing of the anterior antennas 

 and the long 2nd maxillipeds are its chief distinguishing features. 



Stenhelia dentipes, a. sp. Plate VI., figs. 8 to II. 



Length, female, 0'5(> millim. ; male unknown. 



Cephalothorax somewhat angular anteriorly, with long narrow pointed rostrum. 



The antennae in the only specimen found were missing, with the exception of the 

 four basal joints on one side. Mouth organs as in S, brevicornis, with the exception 

 of 2nd maxillipeds, the middle joint of which is broadly ovate, and the claw curved 

 and slender. 



The inner branch of the 1st pair of natatory legs is double the length of the outer 

 branch ; 2nd to 4th pairs as in S. brevicornis. Inner branch of 5th pair elongated, 

 terminating in a short dagger-like spine ; second joint long and gradually narrowing, 

 ending in a small elegant foot-shaped protuberance having 2 apical and 5 lateral seta-. 

 In this respect it somewhat resembles S. blanchardi, T. and A. Scott. Abdomen 

 similar to S. p&rplexct ; furcal rami twice as long as the width. 



Found with the other members of the genus here described in the Muttuvaratu 

 pearl-oyster washings. It can be readily distinguished by its 5th pair of natatory legs. 



Stenhelia knoxi, n. sp. Plate X., figs. 15 to 18. 



Length, female 0'07 millim. ; male unknown. 



Cephalothorax and abdomen each with 5 segments. Anterior antennae very stout 



6 -jointed, the proportional lengths being as follows : . 



Both branches of 1st to 4th pairs of natatory legs 3-jointed ; outer branch of 1st 

 pair has long, strong, lateral and terminal spines; 2nd joint of 5 th pair ovate. 



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



We name this species after Robert Knox, who escaped from the King of Kandy 

 to the coast, at the pearl banks, in IGT'J. 



Although the anterior antennae are only G-jointed instead of 8, in all other respects 

 the characters agree with those of Stenhelia, so we have thought it best to include 

 (his species in that genus. 



Stenhelia minuta, n. sp. Plate VI., figs. 21 to 24. 



Length, female, 0"5 millim. ; male unknown. 



This minute species bears a close resemblance to S. brevicornis, both in general 



