STEBBINGELLA THEELI. 103 



pairs of peraeopoda, in the length of the seventh pair and of the last 

 coalesced ural segment, they would rather be looked upon as local varie- 

 ties. As far as it is possible to judge from the description of STREETS, 

 and from his unsatisfactory drawing, there are great differences in the 

 sculpture on the peraeon and pleon. 



The species is one of the most beautiful of all the Hyperids, and 

 it is a wonder that it has so long escaped the attention of zoologists. 



The integument of the body (PL V, fig. 1 ; p. 21 fig. 3) is very 

 thick and calcareous, showing a rich sculpture, especially on the peraeon, 

 which consists of protruding bands or rolls, straight and curved, and 

 curiously formed nobs and tubercles, interrupted by notches and furrows. 

 The epimerals are very thick, the third, fourth, and fifth are much thicker 

 than high; the fifth is abruptly incised or rather truncated at the middle 

 so as to form a broadly protruding angular tubercle, which, however, 

 does not project into a more or less curved spine-like tooth as in the 

 two other species. 



The head is dorsally carinated, and is considerably longer in the 

 female than in the male, especially as to the rostrum. In the male 

 (p. 21, fig. 3) the rostrum is half as long again as it is broad at 

 the base (i. e. the point of fixation of the first pair of antennae), and a 

 little shorter than the rest of the head; in the female, on the other 

 hand, the rostrum is more than three times as long as it is broad at 

 the base, and longer than the rest of the head; the rostrum is closed 

 on the under side more completely in the female than in the male. 



The first pair of antennce in the male have the first flagellar 

 joint twice as long as it is broad at the under margin; the projecting 

 lower front corner is a little more than a third part as long as the under 

 margin of the joint; the second joint is a little shorter than the third ? 

 which is a trifle shorter than the fourth; all the three together are 

 shorter than the under margin of the first flagellar joint. The first 

 peduncular joint in the female is very long; the flagellum is slender 

 and consists of three joints. The second pair in the male reach to 

 the middle of the rostrum; the first joint is tolerably curved, and a little 

 shorter than the second, which is shorter than the third; the fourth is 

 much shorter than the second. 



The first pair of perceopoda (PI. V, fig. 2) are considerably 

 smaller than the second; the carpus is a third part broader than long, 

 and has the lower front corner a little protruding in front of the base of 



