seem to live normally on or very near the bottom as e. g. Pas. Sivado (Risso), though not only 

 post-larval, but even adult specimens of this form are occasionally found in midwater or even 

 at the surface. According to Stanley Kemp Pas. principalis should also be confined to the 

 bottom, but Oscar Suxd (191 2) remarks that this is not always the case, this species having 

 been captured also in midwater. A young specimen of this genus was taken by the "Siboga" 

 in Plankton of the Halmaheira Sea. 



I. PasipJuca propinqtia de Man. PI. I, Fig. i — \ j. 



PasipJuea propinqua J. G. de Man, in: Zoologische Mededeelingen, uitgegeven vanwege 's Rijks 

 Museum van Natuurlijke Historie te Leiden. Deel II, 1916, p. 147. 



Stat. 100. June 29. 6° 11' N., i20°37'.5 E. Near the Sulu Islands. 450 m. Bottom coral. 

 I male. 



Unfortunately this specimen is rather badly mutilated, the 3'''^ and the 4"' segments of 

 the abdomen are torn from one another and also the 1^' and the 2"'^, while the antennular and 

 antennal flagella are incomplete. Pasiphaa propinqita belongs to the typical species of this 

 genus, to those in which the extremity of the telson is not forked or emarginate; it differs from 

 all known species by that extremity being not truncate or slightly convex, but rather much 

 prominent. This specimen is about 72 mm. long, measured in the middle line, the length 

 (17 mm.) of the carapace is nearly one-third the length (55 mm.) of the abdomen; the carapace, 

 7,5 mm. high at the level of the branchial regions, is about twice as long as high and 

 in a lateral view it narrows rather much anteriorly as usual ; like in the other species the 

 posterior margin is emarginate in the middle. The carapace is rounded dorsally, not carinate. 

 \ On each side of the middle line the rounded dorsum seems, however, to be slightly pinched 

 in; gradually narrowing anteriorly, it ends in a very small tooth, that has the appearance of 

 being mutilated and incomplete ; this tooth is slightly compressed and placed a little behind the 

 front. Front triangular, prominent, subacute, rather narrow, separated by a semicircular 

 curve from the rounded, outer orbital angles that reach as far forward as the front. 

 Antennular angle also obtuse, separated by a shallow sinus from the outer orbital angle and by a 

 deeper, though shorter sinus from the small branchiostegal spine. Anterolateral angle of carapace 

 broadly rounded, branchiostegal sinus shallow. Sides of carapace smooth, with no ridges. 



First abdominal tergum rounded, the 2""^ shows a trace of an obtuse, indistinct carina 

 posteriorly, the 3'^'^ and the 4'*^ are more distinctly carinate, though the carina is only subacute 

 and does not extend to the posterior margin of the 4"^ segment; the 5''' segment, though much 

 compressed, is again rounded dorsally. The 6"' segment, which is 10,5 mm. long and 6,3 mm. 

 broad or high, is one and a half as long as the 5"^ (6,6 mm.) and also about one and a half 

 as long as broad; it is sharply carinate dorsally, the carina terminates posteriorly in a 

 small acute tooth which is directed downward and one observes, on the anterior half of this 

 segment, a shallow, longitudinal, oval impression, situated twice as far from the lower as from 

 the upper margin and defined above by a curved ridge. The telson (Fig. i/), which is 8 mm. 

 long, one-fifth shorter than the 6'*' segment, is deeply grooved dorsally, much compressed and 



I 



