KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 22. N:0 7. 187 



siderably shorter than the femur; the margins are smooth. The dactylus is slightly curved, 

 and smooth; it is as long as a fifth part of the metacarpus. 



The pleon equals the whole peraeon in length. The lateral parts of the pleonal 

 segments are strongly rounded below; the hind corners of the last two segments are an- 

 gular and sharp-pointed, that of the first segment is obtuse. 



The pieopoda. The outer ramus of the first pair has fourteen joints, the inner 

 thirteen. 



The urns is somewhat longer than the last pergonal segment. The first ural 

 segment is as long as the last coalesced one; this latter is about a third part broader 

 than long. 



The uropoda. The first pair reach below the middle of the outer ramus of the 

 last pair; the peduncle is narrow, linear, and almost five times as long as broad; the rami are 

 equal in length, narrowly elongated and sharp-pointed; at the upper end of the rami, where 

 they are in contact with one another, excavations, with what are probably outlets for glands, 

 are distinctly to be seen; the rami are considerably shorter than the peduncle; the inner 

 ramus is serrated on the outer margin, the outer ramus on the inner. The second pair 

 do not reach as far down as the first; the peduncle is broader than that of the preced- 

 ing pair, almost linear, and more than twice as long as it is broad at the apex; the outer 

 ramus is a little shorter and much narrower than the inner, sharp-pointed, and having 

 the outer margin smooth and the inner serrated; the inner ramus is broadly ovate, with 

 the apex produced, and sharp-pointed; both margins are serrated; the inner ramus is 

 much shorter than the peduncle. The third pair are more elongated than in the four 

 preceding species; the peduncle is scarcely broader than that of the second pair, almost 

 linear, and much more than twice as long as broad at the apex; the inner ramus is a 

 little more than half as long as the peduncle, and much longer than its breadth; it is 

 broadly ovate, with produced, sharp-pointed apex, and has both the margins serrated; the 

 outer ramus is scarcely longer than the inner, and about half as broad; it is serrated 

 along the inner margin, and smooth on the outer. 



The telson is a little longer than broad, and obtusely triangular; it is somewhat 

 broader than the peduncle of the last pair of uropoda, and not half as long; it is much 

 shorter than the last ural segment. 



The femal e. 

 PI. X, lis-. 30—32. 



The forepart of the body is tumid in the ovigerous female; the middle of the perseon 

 is about twice as broad as the pleon; the pleon and urus together are scarcely shorter 

 than the peraeon. 



The head is much shorter than the first two perasonal segments together, but broader 

 and deeper than in the male. 



