1 882.] Representing the order Phyllocarida. 865 



process (or endopodite ?) which, in the female, is directed upward 

 and backward (Fig. 5 a, en), reaching to the tergum of the basal 

 abdominal segment, and ending in two very long, slender setae, 

 while a few other similar setae arise, one from each joint. 1 In the 

 male of N. geoffroyi, according to Claus, the long setose process 

 is directed forwards and downwards. 



The 2d maxilla (PI. xm, Figs. 2, 5 mx 1 ).— These are entirely 

 unlike those of the first pair, and unlike the Decapodous or Phyl- 

 lopod type. They consist of a basal portion composed of four 

 thin, delicate, unequal lobes (Fig. 5, h 2: 3 ' 4 ), edged with long setae, 

 with two setae twice as long as the others arising from the 4th 

 lobe ; from this four-lobed basal joint or coxopodite, arise two 

 appendages, the anterior (exopodite, ex) small, one-jointed ; the 

 posterior (endopodite, en) two-jointed, the end of the second 

 joint carrying above five long, spreading, stout, slender setae 

 This two-jointed appendage Claus considers as representing the 

 stock of a palpus. 



This pair of maxillae are quite unlike those of Decapods 

 {Mysis, etc.), as well as those of the Phyllopods, and appear to 

 be another diagnostic feature of the order. 



The absence of any maxillipedes, or of any rudiments of them, 

 either in the adult or in the embryo, is a negative character of a 

 good deal of importance when we regard the affinities of the 

 group to the Decapods, or the zoea-form of the same order, 

 where two (Macrura) and three (Brachyura) pairs of maxillipedes 

 are present, there being three pairs in the adult Decapod. 



The eight pairs of Phyllipodiform thoracic feet (Plate xiv, Fig. 

 3). — The maxillae are directly succeeded by eight pairs of leaf- 

 like thoracic feet, the maxillipedes not being present. The feet 

 all repeat each other in form, and a description of the 3d or 4th 

 pair will answer for the 1st as well as the last. The leg (Fig. 3, 

 3d or 4th pair) consists of a broad, thin, six-jointed appendage, 

 the endopodite {en), which i- fringed with very long, delicate 

 setae, those arising from the terminal joint being ciliated ; while a 

 second series of fine stiff setae arise obliquely from the edge. To 

 the second joint of the endopodite are appended a distal or lower 

 very broad thin gill, not quite twice as long as broad, and which 

 reaches to the end of the endopodite, while situated more exter- 

 nally is a double, broad, large lobe which corresponds to the exite 



1 Claus draws attention to the position of this foot as compared with the 2d max- 

 ill.r (putzfuss) of the Ostracoda. 



