'4 



wide in the middle. Exopodite reaching to the middle of the nierus. Basis and ischium of 2 nd legs 

 (Fig. 5 ^) like in Pas. kaiwiensis, merus 4,5 mm. long, one-third longer than that of i st pair, 

 1 1 -times as long as broad in the middle, not thickened at distal extremity and armed with 3 

 well-developed spines, long 0,23 mm., along the distal half and with 5 or 6 rudimentary spinules 

 along the proximal half. Carpus 0,8 mm. long, about one-sixth the length of the merus, and 

 one and a half as long as thick distally ; lower margin with acute spine at the extremity. Chela 

 5,7 mm. long, one-fourth longer than the merus, fingers (2,7 mm.) one-tenth shorter than the 

 palm (3 mm.), which is nearly 5-times as long as wide. 



Merus of 3 rd legs (Fig. 5/) 3,7 mm. long, 37-times as long as wide in the middle, 

 somewhat thickened at the proximal extremity, a little less at the distal one. Carpus 0,36 mm. 

 long, one-tenth of the merus and nearly 3-times as long as thick in the middle. Terminal joint 

 tapering, 2,25 mm. long, about two-thirds of the merus, with a few marginal setae. 



Ischium of 4 th legs (Fig. 5^) 0,6 mm. long, merus 1,2 mm., twice as long as the ischium 

 and S-times as long as wide ; following joints lost. 



Merus of 5 th pair (Fig. 5//) 2,12 mm. long, 1 2-times as long as wide; carpus 0,8 mm. 

 long, 0,19 mm. thick distally; propodus 1,88 mm. long, dactylus (Fig. 5/) long 0,48 mm., broad 

 0,21 mm., little more than twice as long as wide, for the rest like in Pas. kaiwiensis. 

 The carpus appears therefore a little less than half as long as the merus and the propodus, the 

 latter a little shorter than the merus, while the dactylus measures one-fourth of the propodus. 



The species with which this specimen presents some afhnities, are Pas. cristata Bate, 

 Pas. americana Faxon and Pas. fiagellata Rathb. Pas. cristata Bate from the Fiji Islands 

 resembles the specimen from Stat. 141 as regards the abdomen, the carapace and the two pairs 

 of antennae, but the post-frontal tooth has a different shape, like also the anterolateral margin 

 of the carapace, while the legs show different measurements. The carpus of the two first pairs 

 appears in the specimen from Stat. 141 shorter in proportion to the length of the palm and 

 the merus of the 2 nd pair is armed with several spinules, in Pas. cristata only with one. In 

 the legs of the 3 rd pair the carpus appears also shorter in proportion to the terminal joint than 

 in Pas. cristata. Unfortunately the extremity of the telson was not described by Spence Bate. 



Pas. americana Faxon differs by the carapace being longer in proportion to the length 

 of the abdomen, by the telson being more deeply notched, by the narrower scaphocerite, which 

 is 4-times as long and wide and by the meri of the legs of the i st and 2 nd pair being only 

 furnished with a single spine near the middle of its inferior margin. 



Pas. jlagellata Rathb. from the Hawaiian Islands differs by the length of the carapace being 

 contained little more than twice in the length of the abdomen, by the 6 th segment of the abdomen 

 being bluntly carinate, slightly exceeding the telson, and being wider in proportion to its length. 



When this species should indeed once prove to be new to science, the name of Pas. 

 hilarula is proposed for it. 



5. Pasiphcea kaiwiensis Rathb. PI. II, Fig. 6 — 6/. 



Pasiphcca kaiwiensis M. J. Rathbun, in: U.S. Fish Commission Bulletin for 1903, Part III, 

 Wash. 1906, p. 927, PI. XXIII, fig. 4. 



