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well marked, but the subhepatic ridge and the cervical groove are hardly discernible. The 

 longitudinal fissure which in Parapenaeopsis and Trachypenaeus extends from the anterior border 

 of the carapace backward seems to be wanting, Init there is a short transverse suture at the 

 level of the third legs. 



Like the carapace, the abdomen resembles also closely that of Trachyp. anchoralis 

 (Sp. Bate). As in this species the 2"<i tergum carries a short carina in the middle, that measures 

 one-fourth the length of that tergum, the 3''^ — &'•> terga are carinate, except the anterior third 

 of the 3''^ tergum; the carina of the 6''' ends in a tooth. Measured along their upper border, 

 the carapace without the rostrum appears to be 9,5 mm. long, the fifth abdominal somite 

 3 mm., the sixth 5 mm. and the telson 5,75 mm.; the sixth somite is thus half as long as the 

 carapace and slightly shorter than the telson. The telson that barely reaches beyond the middle 

 of the inner uropod, full)' agrees with that of Trachyp. ciirvirostris (Stimps.). (Vide : J. G. 

 DE Man, Trans. Linnean Soc. London, 1907, PI. XXXIII, Fig. 58); the median groove is deep, 

 though narrow and at either side of it there is another shallow groove that fades away 

 backward. There are 4 small spinules on each lateral margin, arranged as in Trachyp. cnrvi- 

 rosiris\ the posterior spine is larger than the three preceding, that easily may be overlooked, 

 and perhaps this has been done b)- Haswell when he described the telson of Pe7i. granulostis 

 as having its lateral margins armed "with a single, weak spine". The pleura of the first somite 

 show the same incision on their lower margin as in Trachyp. anchoralis and Trachyp. curvi- 

 rostris (de Man, I.e. 1907, Fig. 57). 



The upper antennae closely resemble those of Trachyp. anchoralis-, their peduncle 

 (7,5 mm.) is a little shorter than the carapace without the rostrum, the second joint appears, 

 as in that species, comparatively shorter than in Parapenaeopsis, this joint being barely twice 

 as long as the third; the barely longer, upper flagellum is just as long as the peduncle. 



Antennal flagella twice as long as the body; scales as long as the antennular peduncles. 



The external maxillipeds reach to the end of the i*' joint of antennular ]>eduncle, i.e. 

 to the anterior third of the antennal scales; they resemble, like the legs, closely those of 

 Trachyp. anclioralis. 



The legs of the i^' and of the 2"'i pair bear a slender spine at the base, those of the 

 l^^ are unarmed; the 3"^ legs reach with their chelae beyond the scales and those of the 5'^' pair 

 with their dactyli, the latter being just half as long as the propodi. All the thoracic legs are 

 furnished with a large petaloid exopod, except the last pair, on which it is much smaller. 



As is proved by the preceding, this new species bears a close resemblance to Trachyp. 

 anchoralis (Sp. Bate), it differs, however, at first sight from this and the other species of 

 Trachypenaetis by the petasma, that is symmetrical, 4 mm. long, not yet half as long as the 

 carapace without the rostrum, and reaching to the coxae of the fourth pair of legs. The two 

 branches are united on their anterior surface, but on the posterior they leave a narrow fissure 

 between them, that widens a litde towards the base; the stem ends distally in two large 

 horns that are perpendicular to the stem and, suddenly narrowing, are curved inward, each 

 horn ending in a mucronate tip, that is somewhat turned forward; the sharp, outer margin of 

 each horn is, just above the curvature, slightly emarginate. From the transverse, anterior margin 



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