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the male specimen the carina is a Httle less prominent and does not end in a spine. On each 

 side of the mid-dorsal carina several other carinae exist on the sides of the carapace, that are 

 all prominent and sharp. From a point, situated just in advance of the level of the anterior 

 extremity of the mid-dorsal carina and nearly midway between the rostrum and the orbital 

 spine, the long subdorsal carina runs backward and slightly outward to near the posterior 

 border of the carapace; in the female this carina ends anteriorly in an acute spine, which is a 

 little smaller than that in the mid-dorsal line, but in the male the anterior extremity is blunt 

 and in both sexes it is indented by the cervical groove. Between this subdorsal and the mid- 

 dorsal carina one observes on either side of the latter, on the eastric region, two small, isolated 

 prominences and posterior to the cervical groove, on the cardiac region, three or four .short 

 carinae. Of the two prominences on the gastric region of the female that are subacute and 

 much smaller than the mid-dorsal spine, the anterior is situated on the level of this spine, a 

 little farther distant from the subdorsal than from the mid-dorsal carina, the other prominence 

 is situated posterior to it and a little more laterally, nearly midway between the two carinae; 

 in the male the anterior prominence is twice as far distant from the subdorsal carina than from 

 the middle line and both are obtuse. On the cardiac region of the male are situated on each 

 side of the middle two pairs of short carinae, the carinae of each pair being placed behind 

 one another, while the two pairs are nearly parallel with the mid-dorsal carina; of the two 

 carinae of the inner pair the po.sterior is almost twice as long as the anterior and this pair is 

 more than twice as far distant from the subdorsal as from the mid-dorsal carina; of the two 

 carinae of the outer jjair the posterior is as long as the ]josterior carina of the inner, the 

 anterior is twice as long, reaches to the cervical groove and almost unites with the subdorsal 

 crest. In the female the inner pair is substituted by one single carina and the two of the outer 

 pair are of equal length, together as long as the inner carina and the anterior reaches by far 

 not the subdorsal crest. Below the subdorsal carina still three others are found. The first of 

 these extends from a point, situated a little in advance of the anterior extremity of the mid- 

 dorsal crest and distinctly farther distant from the subdorsal carina than from the posterior 

 extremity of the antennal crest, backward to the cervical groove, parallel with the subdorsal 

 crest. This carina ends, both in the male and in the female, in a well-developed spine, which 

 in the female is almost as large as the gastric spine; immediately behind this carina and just 

 below it begins the second, which is twice as long, extends straight backward to near the 

 posterior border of the carapace and terminates anteriorly also in a spine, smaller than that 

 of the anterior. The third, finally, which is unarmed, runs in the male parallel with the second 

 and nearly midway between it and the lower border of the carapace; it is little prominent, 

 begins, like the second and like the subdorsal crest, at a short distance from the posterior 

 margin and disappears on the level of the spine of the second. In the female the form of this 

 third carina could not be ascertained with certainty. 



The abdomen resembles, as regards grooves and sculpture, that of the allied species, 

 Pont, incisus and angustirostris^ and differs only in minute details. So e. g., while in Potit. 

 mtgustirostris the two juxtaposed carinae of the 4"' tergum are fused behind the middle, in 

 Pottt. Kempii they already unite at the anterior third or fourth and from this point at either 



