97 



The i^' maxilla (Fig. 22 g) has no doubt been damaged by the operation, because there 

 is only one endite; this endite, somewhat longer than broad, is fringed with spines and feathered 

 setae, except on that part of the margin which is situated near the palp; the truncate tip of 

 the palp bears a feathered seta at that angle which is situated opposite the endite. Of the two 

 inner distal lobes (Fig. 22/1) of the 2°'^ maxilla, that project considerably beyond the basal 

 lobe, the rounded anterior is one and a half as long as the posterior and the narrow fissure 

 between them does not extend to i:he inner margin, so that the two lobes coalesce on their 

 internal half Posterior lobe of scaphognathite rounded. 



The endopodite of the i*' maxilliped (Fig. 22/, 22/) bears a small obtuse lobe at the 

 base at the inner side, like in Tlialass. lucida (Dana) as figured by Dr. Ortm.^nn (Zoolog. 

 Jahrb. Bd. V, Abth. f. Syst. 1890, Taf. XXXVII, fig. i^); basipodite separated by a suture 

 from the coxopodite, epipodite well developed like in the genus Pandalus. 



Second maxilliped (F"ig. 22X') resembling that of Thalass. lucida, terminal joint applied 

 as a strip to the end of the 6'i', one and a half as broad as long. 



The terminal joint of the external maxillipeds that almost extend to the tip of the 

 antennal scale, is 4-times as long as the penultimate and gradually tapers to the tip, while the 

 borders are clothed with spines and setae; the outer margin of the antepenultimate joint is 

 emarginate and runs therefore like a S. The exopodite reaches to the middle of the penultimate 

 joint. The oral appendages, here described, are those of the left side and taken from the adult 

 male collected at Stat. 282. 



The peraeopods of the i^' pair reach in the adult male to the middle of the terminal 

 joint _ of the external maxillipeds. Ischium only '/n longer than merus, the latter one-fourth 

 broader than ischium, both joints fringed with setae along their inner margin, a few also on 

 the outer. Carpus five-eighths of the merus, with a transverse row of 5 or 6 short spines on 

 the inner half of the distal border that articulates with the propodus, and clothed with long 

 setae on the inner and distal margin, a few also on the outer; terminal joint (propodus) one 

 and a half as long as the carpus, tapering, acuminate and slightly curved, 5-times as long as thick 

 near the base, and armed with spines and setae; a minute chela at the extremity does not exist. 



The peraeopods of the 2"^' pair reach to the tip of the antennal .scale. Ischium 3-times 

 as long as broad; upper border a little curved, convex; lower border straight, though uneven, 

 and bearing in the middle two or three spiniform ju.xtaposed setae, while both margins show 

 a few prominences, near each of which a short seta is implanted. The merus which is as long 

 as the ischium but a little less broad, has an uncouth shape; the lower bordernamely is hollowed 

 out and concave, for embracing the carpus and the chela, which the animal uses to bear drawn 

 back like in some species of the genus Athanas Leach; the obtuse prominences on both 

 margins are larger than those of the ischium and on each prominence a .short seta is implanted. 

 Carpus conical, a little more than half as long as the merus and a little more than one and 

 a half as long as thick; the upper border bears a small obtuse tubercle, tipped with a seta, 

 near the meral articulation, from which it is separated by a notch. The carpus is flattened 

 above. Chela compressed, 27.,-times as long as the carpus and 27,,-times as long as broad, 

 fino-ers half as long as the palm. The immobile finger is armed near the base with a large. 



SIBOGA-EXPEDiriE XXXlXfl'. '3 



