REPORT ON JAPANESE STOMATOPODA 



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with ten teeth including the terminal one. Rostrum triangular, ter- 

 minating in an acute median spine. Carapace smooth, with all. its 

 angles rounded. Last two thoracic and first two abdominal segments 

 provided with a pair of inconspicuous carinae. All abdominal segments 

 with their postero — lateral angles ending in spines. The whole dorsal 

 surface of the last two segments and a part of that of the fifth 

 abdominal segment, covered with irregularly shaped granules. Eight 

 stout spines or lobes on the postero-lateral margin of telson, the median 

 crest of which is broad and somewhat obscurely defined. The inner 

 spine of the dorsal prolongation of uropod much longer than the outer. 



Description. — The rostrum is of a long triangular shape with the 

 apex terminating in an acute spine. The carapace is smooth ; its 

 length measures about 1 j 6 the total length, the maximum breadth 

 about i x /s the length. The gastric sutures are obvious and diverge 

 posteriorly, while the cervical suture is only faintly marked. The 

 anterior margin is nearly straight, the posterior sinuate, with all the 

 angles evenly rounded and without spines. The lateral parts of the 

 carapace are bent downward, so that the lateral margins are not 

 visible from the dorsal side. There is a shallow groove along the 

 margin throughout the whole length. Of the thoracic segments the 

 last two are provided each with an obscurely defined longitudinal 

 carina running near the margin. Lateral edges of the sixth segment 

 bear each a flattened triangular spine, and those of the seventh are 

 produced into a short acute spine at their extremities. All the segments 

 of the abdomen have each an acute spine at the postero-lateral angles, 

 and there is a conspicuous impression along the anterior margin. The 

 first two segments possess a faintly marked carina close to the lateral 

 margin. The sixth segment is covered with granules of irregular shape 

 throughout the entire dorsal surface ; further there exist a pair of low 

 submedian carinae which posteriorly converge a little and the terminal 

 spines of which do not reach the posterior margin. The fifth segment 

 is likewise ornamented with granules in its postero-intermediate parts. 



