GG AMVniPODA NORMALIA. 



short ; the flagellum not longer than the peduncle. Inferior antennte 

 three times as long as the superior, the peduncle not extending 

 beyond the peduncle of the superior flagellum. First pair of gna- 

 thopoda having the propodos nearly three times as long as the 

 carpus, and armed upon the under side with a strong curved spine 

 near the base of the dactylos. Second pair of gnathopoda having 

 the propodos a little shorter than the carpus, and both inferiorly 

 covered with minute denticles ; the propodos furnished upon the 

 superior margin -v^dth tufts of long hair, serrated on both margins ; 

 palm short, inferior angle produced into a tubercle ; dactylos not 

 so long as the palm. Coxae of the second pair of pereiopoda having 

 the lower half of the posterior margin greatly produced. Posterior 

 pair of pleopoda having the rami much longer than the basal arti- 

 culation. 

 Length one inch. 



ITab, Van Diemen's Land (Sir J. C. Eoss). 



The figure and description are taken from Mr. White's typical 

 specimen. 



3. Lysianassa Magellanica. (Plate X. fig. 5.) 



Lysianassa Magellanica, Edwards. 



Lucas, Anim. nouv. on rares datis les parties Australes de VAnierique 

 du Sud, par Francis de Castelnau ; Ento7nol. par 31. H. Lucas. 



Cephalon short and small. Pereion arcuate; segments deep, not 

 much compressed. Antennae subequal, slight. First pair of gna- 

 thopoda having the carpus shorter than the propodos ; second pair 

 having the propodos and carpus subequal. Three posterior pairs 

 of pereiopoda short, stout, subequal ; bases round ; posterior mar- 

 gin smooth, overlapping the ischium. Posterior pair of pleopoda 

 having the rami styHform, clean, scarcely longer than the base. 



Length about three inches. 



Hab. Magellan (if. cVOrhigny). 



The figure was traced from a plate, through the great kindness of 

 M. Lucas, before the publication of his work, and corrected from a 

 specimen — the original type, I believe, of M. Milne-Edwards — ^pre- 

 served in the Museum of the Jardin des Plantes. 



4. Lysianassa nasuta. (Plate X. fig. 6.) 

 Lysianassa nasuta, Dana, U. S. Explor. Exped. p. 915. pi. 62. 

 " Body much compressed. Coxae very large. Eyes reniform. Su- 

 perior antennae short, longer than the infeiior; flagellum about 

 seven-jointed, appendage three- or four-jointed. First pair of 

 gnathopoda with a small dactylos, not longer than one-third of 



