NO. 6.] ACCOUNT OF THE SPECIES. 103 



are rather dissimilar, some being bidentate at the tip, some simple, and some 

 hair-like. The outermost tooth is the largest, is ungniform, and separated from 

 the others by a deep incision. The palp is rather large, with the basal part 

 comparatively broad and somewhat produced at the inner corner, carrying, 

 inside, 3 ciliated setae. The inner ramus is well defined at the base, and 

 projects somewhat beyond the outer, which is quite normally developed. 



The maxilla? (fig. 3) differ somewhat in their structure from that usually 

 met with, especially as regards their distal part or the palp. The masticatory 

 lobe is well developed, and is armed with about 8 ciliated spines. The oppo- 

 site vibratory plate is likewise distinct, carrying 4 long plumose setae. The 

 distal part of the maxilla is rather produced, and terminates in a broadly 

 rounded lamella edged with 9 remarkably strong and curved plumose setae. 

 This lamella no doubt represents the outer ramus; it is, however, not at all 

 defined at the base. Between this lamella and the masticatory lobe, the 

 inner edge exhibits 3 successive conical projections, each tipped with a single 

 plumose seta. The outermost of these projections, which is somewhat remote 

 from the other 2, may answer to the inner ramus, the other 2 to the seti- 

 ferous lobules found in most Calanoids between the masticatory lobe and 

 the palp. 



The anterior maxillipeds (fig. 4) are very powerfully developed, somewhat 

 recalling those in the Pontdlidce. The digitiform lobes of the anterior 

 edge are rather unequal in size, and only 4 in number, the 2 proximal ones 

 being wholly confluent. The setae springing from these lobes are also rather 

 unequal, rapidly increasing in size distally, one of the 3 belonging to the 

 outermost lobe being very much prolonged and claw-shaped. A similar cha- 

 racter is also exhibited by 4 of the spines issuing from the short terminal 

 part. All these claw-like spines are abruptly curved in their distal part and 

 finely denticulate along the concave edge, their length being almost twice 

 that of the stem of the maxilliped. 



The posterior maxillipeds (fig. 5) are far less robust, and, on the whole, 

 are built upon the same type as in the other Temoridce, the 2 basal joints 

 being somewhat lamellarly expanded, and the terminal part very flexible, 

 composed of 5 well-defined articulations clothed with slender setae. 



Of the legs, only the 4 anterior pairs are natatory, the 5th pair being 

 very different. 



