14: G. 0. Sårs. 



closer comparison, however, some well-marked differences 

 may be found to exist, especially as regards the form of 

 the head (see fig. 3). Thus the ocular region is much more 

 prominent, forming a very conspicuous rounded protuberance 

 defined above by a well-marked sinus, and the rostral part 

 is more broadly rounded than in the male of L. siliqua, 

 carrying at the tip the characteristic movable spine. Moreover, 

 the occipital projection, which in L. siliqua is drawn out to a 

 sharp recurved point, is far less produced and obtusangular. 

 The antennulæ, antennæ and oral parts scarcely differ in 

 structure from those appendages in the male of L. siliqua. 

 Of legs, 26 pairs may be counted, whereas in L. si- 

 liqua only 23 pairs were found. The 2 anterior pairs (fig. 4) 

 are, as usual, prehensile, terminating in a complicated hand, 

 the structure of which closely agrees with that in L. si- 

 liqua. In the other pairs, the exopodite is distinguished . by 

 the lobular character of its distal part, the outer edge being 

 divided into a number of successive setiferous lobes defined 

 by deep incisions (see figs. 5 & 6), and even in the hind- 

 most pairs (fig. 7), traces of the same peculiar subdivision of 

 the edge may be proved to exist. The appendicular plate of 

 the exopodite, so characteristic of the present genus, and 

 extending over the posterior face of the legs, is very large 

 and of a similar securiform shape to that in L. siliqua. Its 

 existence, though in a rudimentary state, in the hindmost 

 pairs, is shoAvn by fig. 7. The epipodite, which is rather 

 small in the anterior pairs (figs. 4, 5), attains quite an extra- 

 ordinary length in the middle pairs (fig. 6), surpassing even 

 the dorsal lappet of the exopodite. 



The caudal piece (fig. 8) exhibits the structure charac- 

 teristic of the present genus, and closely resembles that in 

 L. siliqua, though perhaps somewhat shorter and thicker. 



