On Magalocypris princeps. 1 1 



hind with several curved setae. The 3rd joint is about 

 twice as long as the 2nd, and is likewise provided at the 

 end with several curved setæ, one of which is much 

 shorter and thicker than the others and densely ciliated. 

 Finally, the last joint is very small, and is tipped with a 

 number of rather short, spiniform bristles. 



The anterior maxillæ (fig. 11) exhibit each a thick 

 muscular basal part terminating in 4 digitiform processes 

 turned towards the mouth, and carry outside a large 

 branchial plate. The latter, which is extended obliquely 

 upwards, is semilunar in form, and carries along the convex 

 edge about 20 very strong and densely plumous setæ. Of 

 the terminal digitiform processes, the outermost or anterior 

 one is much longer than the other, and is movably artic- 

 ulated to the basal part. It is distinctly Particulate, with 

 the last joint rather short, quadrangular, and armed at the 

 tip with 5 or 6 spiniform bristles. In front of this joint several 

 slender bristles are seen curving downwards and issuing 

 from the end of the preceding joint. The 3 other pro- 

 cesses constitute the true masticatory lobes, not being dis- 

 tinctly defined from the basal part. They are rather 

 short and thick, diminishing somewhat in size inwards, 

 and are armed at the tip with stiff bristles; 2 of these, 

 issuing from the outermost lobe, assume the character of 

 claw-like spines. 



The posterior maxillæ (fig. 12), which occur immediately 

 behind the anterior, have the basal part produced to a 

 single masticatory lobe turned obliquely in front, and clothed 

 at the tip with several slender curved spines. Outside, 

 these maxillæ carry 2 differently shaped appendages, the 

 upper of which has the form of a comparatively small 

 rounded branchial plate edged with 6 thick and densely 



