THYSANOPODA PECTIN ATA. 219 



of strong, partly long setae, and from that part a quite peculiar lobe projects 

 forwards, closely covering the major part of the proximal half of the second 

 joint ; the lobe is at its origin about half as broad as the base of second joint, 

 but it is rapidly strongly expanded outwards, thus furnished with a kind of 

 triangular lateral wing projecting outwards and somewhat downwards above 

 the upper lateral surface of second joint; the anterior margin of the lobe, the 

 wing included, is straight or a little concave, nearly transverse and pi'oduced 

 in a row of 8 to 13 thin, spiniform processes which iiii'rcase in length fi'om the 

 inner to the outer, the inner being short and directed forwards, the outer rather 

 long and directed outwards to a great degree. The second joint is above and 

 inwards produced in a lobe which, seen from al)ove, covers closely the proximal 

 tliird or rather two fifths of the inner half of the upper surface and the inner 

 margin itself of third joint; seen from al)o\'e the outer angle of this lotie is con- 

 \'ex, subangular, or rounded, wliile tlie front margin of the second joint is some- 

 what hollowed outside the Ijase of the lol)e. The third joint with the dorsal 

 keel well defined, scarcely half as long as the joint and ratlier low.-- The anten- 

 nal s(|uama reaches the middle of third antennular joint, it is broad, distally 

 subtruncatc with the outer corner subrectangular and without denticle; the 

 spiniform outer process from the subbasal joint is conspicuously or c\cn consid- 

 erably shorter than the breadth of the sciuama. — The maxillulae (fig. Id) are 

 ([uite peculiar; the proximal lobe has the end nearly regularly rounded; the 

 distal lobe is extremely l)road, distally strongly expanded, broader tlian long 

 and twice as broad as the iiroxinial lobe; tlu> palp (4.) is very small, ovate, 

 not one third as long as the distal lolie, completely co\'ered by the pseudexopod, 

 which is very large, twice as long as broad. 



The abdominal segments are without any trace of dorsal denticles. The 

 lateral plates of second to fourth segments with the lower margin a little 

 emarginate. The j^-eanal spine well developed, simi)le in tlie male, more rarel}' 

 simple, but generally bifid in the female. — The uropods with the entlopod 

 slightly or somewhat longer than the telson and somewhat shorter than the 

 exopod. — The telson witli two piuvs of doi'sal denticles and no serration; the 

 subterminal spines extremely long. 



The copulatory organs (figs, le-li) afford excellent characters. The spine- 

 shaped process (p'.) is rather long, thin, bent strongly inwards near the end of 

 its first third and with tlie distal part soiuewhat curved. The terminal process 

 (p-.) with its proximal third thick and subcylindrical; then it is curved slightly 

 inwards and gradually widened and ilattencd to the enil, which is conspicu- 



