44 



MR. L. A. BORRADAILE ON THE 



of three epipoclites (the epipoclite proper and two " pro-epipo- 

 dites "), as, for instance, in Ghirocephalus (text-fig. 4), is a primitive 

 feature. Beyond the epipodite stood a longer process, the 

 flabellum, which may have been slender, like those of Ooncho- 

 straca (text-fig. 5) and the exopodite of Paranebalia (text-fig. 10), 

 but is perhaps more likely to have been broad, like that of Apus 



Text-figure 15. Text-figure 16. 



Text-figure 17. Text-figure 18. 



Text-fig. 15. Maxilla of Cerataspis, after Boas. 

 „ 16. Larval maxilla of Penceus, after Claus. 

 „ 17. Maxilla of Anisocaris, after Ortmann. 

 „ 18. Larval maxilla of Palcemonetes, after Boas. 



For lettering see p. 71. 



(text-fig. 3) and. the exopodites of most Leptostraca (text-fig. 8) 

 and of the decapod maxilla (text-figs. 15-18, and 47). It pro- 

 bably extended both distally and proximally from its attachment, 

 like the conchostracan and notostracan fla.bella and the maxillary 

 expodite of Decapoda. The axis of the limb ended in an apical 

 lobe, and on the inner edge stood a row of endites. It does not 



