AHPHIPODA. 21 



joint curved, oblong, almost as long and three times as wide as the next throe ; thinl 

 and fifth sul>ciual, fourth rather shorter ; dactylus slender, two-thirds of the length 

 of the preceding joint 



Secoml peraopoda : Side-plates subtriangular, front margin straight, lower and 

 hind margins convex. The legs as in the first pair. 



Third peraopoda : First joint narrow, oblong, straight 



Fourth and fifth peraopod* alike ; first joint oval, deeper than wide, hind margin 

 smooth. 



The uropod* are subequal iu extent and sparsely spiuous ; the peduncle of the 

 third pair is subequal to the first joint of the mums, which is also nubequal to the 

 second joint 



TV/xtw not reaching the end of the peduncle of the third uropods, narrowing 

 rather abruptly to a point with two spines on each side before the middle and one 

 bojoud. 



Length, 3 mm. 



THAUMATKLSON.* 



TfuinmatfUon, A. 0. Walker, Ann. and Hag. Nat. Hut. XVIII. (1906), p. 15. 



General characters of Metopa. 



Palp of the first maxilla two-jointed. 



First gnathopods distinctly subchelate, 



Telson large, entire, oval and set in a vertical plane on its longer edge. 



T. HERDMANI. (PL 7, fig. 11.) 

 . Am/warn, A. 0. Walker, Ann. and Hag. Nat. Hist. XVIII. (1906), p. 15. 



W.Q., Oct, 1902; 8-net, Hut Point; from Sponges. One spec, W.Q., 13 Feb., 

 1904 ; D-net, Hut Point; one. 



Body as in Metopa : the fourth side-plate unusually large, covering the bases of 

 the last three pairs of peraeopods. The last two pleon segments with a postero-dorsal 

 tooth. Segments of the urus coalesced. 



Antennae: subequal, longer than the head. 



Upper antenna: First joint longer than the second, which is rather shorter than 

 the third, and has the upper margin produced ; there is no appendage. Flagellum 

 shorter than the peduncle. 



Lover antenna : Peduncle subequal to that of the upper, second and third joints 

 subequal and together longer than the flagellura. 



Maxillipeds : Inner lobes reaching half-way up the narrow outer lobes, apparently 

 divided rather further down than in Mttopa ; outer lobes, as in Proboloide*, a mere 

 slight expansion of the inner margin of the basal joint, which is produced distally half 

 the length of the next joint, which, as well as the remaining joints of the palp, is short 



[Rectiui ThaumatoteUoo. ED.] 



