BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 12. AFD. IV. N:0 4. 9 



pleon. The sidcs of the segments with the epimerals, tlie 

 hinder margin of the last pereional segment, and the antenior 

 margin of the Hrst pleonal segment form a frame around the 

 under-side of the pereion, which is hoUowed. 



The epimerals (Pl. 11, fig. 19) are strongly developed, 

 sabre-formed, increasino- in lenoth and bredtli hackwards; the 

 are Hat, acute, feebly bent, the ones of the seventli segment 

 is more straight than the others. The epimerals of the fifth 

 segment rcach to the anterior margin of the pleon, tliose of 

 the sixth segment to the anterior margin of the unis, and 

 those of the seventh segment beyond the midth of the iirus. 



The pereiopoda (Pl. II, fig. 20 and 21) are subequal in 

 length. The femnr of the iirst pair is the shortest, that of 

 the lifth pair the longest; the metacarpi of the first four pairs 

 are totally smooth, those of the last threo pairs are armed 

 with three or four minute teeth. The dactyli of the first three 

 pairs are a little longer than those of the succeeding pairs ; 

 all strongly curved, the articulation with the metacarpi is wcll 

 developed. 



The pleon is more than twice as broad as long (26 : 11); 

 the segments are snbetpial in length, the iirst much the broadest. 

 The siiperior corners of the first two segments are very long 

 and fiattened, those of the followino; segments decreasc in 

 lengtli. The superior corners of the first segment reach to, or 

 beyond tlic anterior margin of the last pleonal segment, those 

 of the sccond beyond the anterior margin of the nrus. The 

 inferior corners of the first segment reach beyond the midth of 

 the urns, as far as the epimerals of the last pereional seg- 

 ment; tlie ones of the second pair reach to, or beyond the ends 

 of the pedvmcles of the uropoda. In the last three segments 

 the inferior corners are obsolete. 



The pleopoda are short, nearly circular, thick. Those of 

 the second pair want a styliform process. 



The nrus is a little longer than the pleon (12 : 11), as long 

 as the last three pereional segments together, broader than 

 long (4:3), semicircular; the surface is smootli, witbont im- 

 pressions; the margins are even. 



The uropoda are ineqnal in the specimen examincd, the 

 right uropod liaving tlie rami nearly of equal size, the left 

 havincr the outcr ramiis a third lono-er. The rami are slendor, 

 falciform. 



