TEEEESTEIAL ISOPODA OF KEW ZEALAND. 115 



outer four joints confluent; masticatory lohe nearly as large as the terminal part, and 

 terminating in a narrow, finely-ciliated lash ; epignath ol)long-linguiform, with a rounded 

 expansion at the hase. Legs of moderate size, slightly increasing in length posteriorly ; 

 outer joints extremely spinous. Inner plate of first pair of pleojwda in male greatly 

 produced, hiarticnlate ; that of the second pair of diiferent structure in the different 

 species. Uropoda with the basal part rather broad and flattened, both rami terminating 

 in a pencil of delicate hairs. [Sars, /. c. pp. 160-161.] 



Key to Spraies-. 



1. Dorsal surface and imtcnna; with distinct tliou^li irregular tuljorcles T. otakensis. 



2. Dorsal surface smootli or nearly so. 



a. Surface with scattered longisli set;e. Animal small (I mm.) 7'. phormianus. 



h. Surface without scattered sette. Animal large (7 mm.) . . T. Thomsoni. 



1. TlllCUONlSCUS PHORMIANUS, .sp. nov. (PI. 12. ttg. 1.) 



Philougria rosea, Chilton, Trans. N. Z. lust. xv. p. 11!) & p. 7o (iu part) (188,3) \_aot of Koch]. 

 Philougriu rosea, Pilhol, Mission de I'ile Campbell, p. 13!) (in part) (1885). 

 Philijgria rosea, Thomson & Chilton, Trans. N. Z. Inst. .wiii. p. l."J7 (in part) (188Gj. 



Specific Description. — Male not differing markedly from the female iu the general 

 shape of the body. Body oblong-oval, about two and a half times as long as broad. 

 Dorsal surface not very convex, smooth, or with a few small granulations and irregu- 

 larities ; cephalou and each segment of the mesosoine with a few scattered, rather long, 

 stout setfB, which are irregularly arranged and extend more or less over the Avhole 

 surface, but are most readily seen at the sides, especially in the anterior segments; on the 

 metasome there are few or none ; these seta^ readily break off iu spirit specimens. 

 Cephalou transversely oval, lateral lobes small, front slightly convex. Segments of the 

 mesosome of the usual form, the last three Avith the posterior angles recurved aud 

 acuminate. Metasome about one-quarter the length of the body, ratlier narrow ; first 

 two segments short, epimeral plates of the next three small and appresscd ; last segment 

 with the terminal expansion rather broad, the posterior margin straight or slightly 

 convex, and bearing three or four small sette. 



Antenmc a little less than one-third the length of the body, rather slender, with long 

 setai at the extremities of the second, third, and fourth joints and along the inner margin 

 of the fifth ; these may arise from slight prominences, but the inner margin of the fifth 

 joint does not bear the distinct tubercles found in the next species ; outer margin of the 

 joint straight, with short fine seta; ; fiagellum as long as the fifth joint, of four joints 

 (sometimes only three), pencil of hairs at extremity long. 



Uropoda long, outer branch more than twice as long as the base, conical, narrowing to 

 apex ; inner branch nearly as long, but much narroAver throughout and tapering very 

 gradually to the apex ; both covered with small appresscd sctui and Avith long seta' at 

 apex. 



SECOND SERIES. — ZOOLOGY, VOL. VIII. 18 



