BIHANG TILL K. SV. VET.-AKAU. HANDL. BAND 10. X:0 11. 21 



The pleoii is immersed iu the last segment of the pereion, 

 but the lateral parts of the first segment are free, not hidden. 

 The first seo-ment is narrower than half of the fifth segment. 

 The pleon is broader than the virus (10 : 9). 



The urus is longer than the pleon (5: 4), broadly ronnded, 

 miich broader than long (9 : 5). 



The uropoda reach a little beyond the hinder margin of 

 the urns. 



The animal comes nearest to Ceratotlioa parallela, Otto, 

 bnt is to be distingnished bj the broadly roimded front, the 

 rhomboidal eyes, the form of the hinder coruers of the pereional 

 segments, the free, narrow, first pleonal segment, and the form 

 of the nrus. 



Ovigerons feniale. 

 PI. IV. fig. 41—46. 



The form of the bodi/ is elongate, the anterior and posterior 

 ends are only a little narrower than the middle, the anterior 

 part is not very convex; from the fourth segment of the pe- 

 reion to the end of the urus the body is qnite fiattened. The 

 surface is smooth without spöts. 



The head is broad, triangulär, with broadly rounded front, 

 the sides rounded, not emarginate. The vipper side is smooth, 

 convex. 



The ei/es are mediocre, rhomboidal, surrounded by dark 

 difiiise spöts - 



The Jirst pair of antennce (Pl. IV fig. 43) are nearly as 

 long as the second, thick, not compressed, seven-jointed; they 

 reach quite to the anterior margin of the first pereional segment. 

 The first joint is the longest; it is as long as the two following 

 together. The three last ones are small, tapering. 



The second pair of antennce are but a little more slender 

 than tlie first pair, eight-jointed; the first joint the longest; 

 the four last ones small, taperino-; the last verv minute (Pl. lY 

 fig. 43). 



The pereion is smooth, the sides feebly rounded. The 

 processes of the first segment are very broad, short, bent 

 downwards; the first segment is shorter than the fifth, but as 

 lono- as the second. The sixth and seventh segments too-ether 

 are shorter than the second seoment. The hinder corners of 



