THYSANOrODA PECTIN AT A. 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 produced 

 in a row of 8 to 13 thin, spiniforni processes which increase in length from 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 above, covers closely the proximal 

 thn-d or rather two fifths of the inner half of the upper surface and the inner 

 margin itself of third joint; seen from above the outer angle of this lobe is con- 

 vex, subangular, or rounded, while the front margin of the second joint is some- 

 what hollowed outside the base of the lobe. The third joint with the dorsal 

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

 nal squama reaches the middle of third antennular joint, it is broad, distally 

 subtruncate with the outer corner subrectangular and without denticle; the 

 spiniforni outer process from the subbasal joint is conspicuously or even consid- 

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

 quite peculiar; the proximal lobe has the end nearly regularly rounded; the 

 distal lobe is extremely broad, distally strongly expanded, broader than long 

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

 not one third as long as the distal lobe, completely covered 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 preanal spine well developed, simple in the male, more rarely 

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

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

 exopod. — The telson with two pairs of dorsal 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 the distal part somewhat curved. The terminal process 

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

 inwards and gradually widened and flattened to the end, which is conspicu- 



