PLATE XXXVIII. 



Philonicus pectinatus, male (p. 279). 



Fig. o, o. Posterior pair of pereiopoda; basal portion; p,p., first pair of pleopoda, with 

 petasma expanded and united in the median line. 



z. Telson. 



br. Branchial plume ; seen in section. 



br". Secondary branch of same ; taken from the base. 



br"'. Secondary branch of same ; taken from the apex. 



mb. Mastigobranchia. 



