PHiEDRA ANTIQUA, 



AMPHIPODA. 



N ATA TORI A. 



209 



PHOXIDES. 



PHJ:DRA ANTIQUA. 



Specific character. Tliird segment of the i^leon h.aving the posterior margiu 

 toothed and minutely sen-ated. Superior antennse furnished with a secondary 

 appendage. Rami of the postei-ior i^air of pleopoda equal. Telson lanceolate. 



Length ^'^ inch. 



Phfcdra antiqua. Spence Bate, Quart. Journ. Geol. Soe. 1858, p. 137, 

 pi. 6, fig. 8. Oat. Crust. Amph. Brit. Mus. p. 120, 

 pi. 21, fig. 2. 



The head is anteriorly produced to a central point. 

 The third segment of the tail has the inferior half of 

 the posterior margin minutely serrated, the limits being- 

 bounded by a prominent tooth above and below. The 

 superior antennas have the first joint of tiie peduncle 

 broader and longer than the second, and the second more 

 so than the third, whilst the third is scarcely longer, 

 though broader, than the first articulus of the flagellum ; 

 the secondary ajDpendage consists of a single articulus, 

 but the remainder may be broken away. The inferior 

 antennee have the joints of the peduncle that remain in 

 the specimen before us as stout as those of the first joint 

 of the superior. The coxae of the first four pair of 

 legs are deeper than those of the three posterior. The 

 three posterior pairs of legs are subequal. The poste- 



p 



