KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 237 



the hind margin of the metacarpus. The carpus of the second pair is much produced; 

 the front margin of the carpal process is much more than half as long as the hind margin 

 of the metacarpus. The metacarpus of the first and second pairs wants bristles; the hind 

 margin is indistinctly serrated. The third and fourth pairs are a little longer than the 

 first and second; the carpus and metacarpus are not serrated; the dactylus is long, The 

 last three pairs are a little longer than the two preceding; the femur is broad; the carpus 

 is as long as the tibia; the tibia, carpus, and metacarpus are not serrated. The pleonal 

 segments are not produced ; the lateral parts are rounded behind. The peduncle of the 

 last pair of uropoda is more than twice as long as broad. The telson is rounded, broader 

 than long, and shorter than the last ural segment; it is broader than, and not half as 

 long as, the peduncle of the last pair of uropoda. 



Colour. Hyaline, with red spots. 



Length. 2 — 3 mm. 



Hab. The Indian Ocean, Malacca Strait (S. M.). 



This little species is easily distinguished from the preceding Hyperia thoracica, 

 by the length of the carpal processes in the first two pairs of perasopoda, and by the 

 want of dorsal spine-like processes on the hind margins of the last pergonal and the 

 pleonal segments. I am much inclined to think that the Hyperia described by Giles as 

 the young of Lestrigonus bengalensis belongs to this species, and for this reason I have 

 chosen the name Hyperia Gilesi for the type of my description, but at present I cannot 

 settle the question, as Giles expressly says that his specimens have the second and third 

 ural segments free, and that the first and second pairs of uropoda are equal in length. 

 The following description is taken from specimens preserved in the Royal Natural History 

 Museum in Stockholm. 



The male. 



The body is thick and tumid, evenly tapering from the middle of the perseon to 

 the urus. The head and perseon together are shorter than the pleon and urus together. 



The head is fully as long as the coalesced portion of the person. The antennal 

 groove commences at the middle of the front side. 



The jirst pair of antennce reach almost to the hind margin of the first pleonal 

 segment. The first joint of the peduncle is more than twice as long as the two following 

 joints together. The first flagellar joint is much longer than the whole peduncle; the 

 second, third, and fourth joints are short, the following are subequal in length, cylindrical, 

 more than four times as long as broad, and each provided with a few short hairs 

 on the under margin. The flagellar joints are eighteen in number. 



The second pair of antennce are about as long as the first. The first free joint of 

 the peduncle is longer than the second, the third is nearly as long as the first. The 

 first joint of the flagellum is as long as the last peduncular joint; the following are 

 shorter, equal in length, cylindrical, and about four times as long as brod. The flagellar 

 joints are eighteen in number. 



