Iphinotus. Birceuna 2Ü5 



but the process a little less massive, üropod 1, peduncle sleuder, more than 

 twice as long as the slender, subequal, finely ciliated rami. üropod 2 

 shorter but mucli stouter than üropod 1, peduncle about twice as long as 

 the stumpy rami, fringed near outer margin with about 11 short spines. 

 üropod 3 broad above, the pointed apex projecting just beyond the telson, 

 the pair together not so broad as the telson. Telson much wider than long, 

 obtuse-angled, a few slight setules at the sides. L. about 5 mm. 



Lj'ttelton Harbour and Otago Harbour [New Zealand]. 



6. Gen. Bircenna Chilton 



1884 Bircenna (Sp. im.: B.fulvus), Chilton in: Tr. N. Zealand Inst.. ul6 p. 264| 

 1893 B., A. DellaVallc in: F. Fl. Neapel, r. 20 p. 561 | 1899 B., T. Stebbing in: Tr. 

 . Linn. Soc. London, ser. 2 v. 7 p. 421. 



Body broad. Pleon segment 5 very short, *o^^ indistinct. Head broad, 

 depressed in front. Side-plates all very shallow. Pleon segments 1 — S, 

 postero-lateral corners rounded. Antennae 1 and 2 short, antenna 1 rather the 

 longer. Mandible with out palp. Maxiila 1, inner plate with apical setae, 

 outer with 8 apical spines, palp wanting, but margin of maxilla inteiTupted 

 at its point of disappearance. Maxillipeds, inner plates distally truncate, with 3 

 spine-teeth, outer slightly armed, both reaching apex of 2^ Joint of palp, palp 

 Short, 1^* Joint largest, 3 following successively both shorter and narrower, 

 4thyg^.y gmall. Gnathopods 1 and 2 almost simple. Peraeopods 1 and 2, 4*^ Joint 

 a little widened. Peraeopods 3 — 5, 2*^ Joint expanded, larger in 4*^ than 

 in 3*1, and much larger in 5*^ peraeopod; 4*^ Joint rather expanded and 

 decurrent. Pleopods 1 — 3 biramous, with peduncle broadly produced on 

 inner side. üropod 1, peduncle shorter than acute, curved, very unequal 

 rami; üropod 2 similar, but rather stouter and shorter; üropod 3, a Single 

 Joint bifid, with outer apex rounded, inner (perhaps representing ramus) acute, 

 setiferous. Telson short, entire. 



1 species. 



1. B. fxüva Chilton 1884 B.fulvus, B. flava, Chilton in: Tr. N. Zealand Inst, 

 c. 16 p. 264, 265; t. 21 f. 1, 1 a— e | 1893 B. fulva, A. DellaValle in: F. Fl. Neapel, i;.20 

 p. 562 t. 58 f. 73, 73* | 1899 B.f, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v. 7 p.421. 



Peraeon much larger than pleon. Head very prominent, protruding a 

 little below the antennae. Eyes minute. Antenna 1. 1^*^ Joint as long as 2\ 

 flagellum as long as peduncle, 6 joints with sensory filaments. Antenna 2 with 

 only 3 free joints of peduncle, ultimate as long as the 2 preceding combined, 

 flagellum about as long as free part of peduncle, 4-jointed. Gnathopods 1 

 and 2, 3^ Joint longer than broad, as long as 4*^ 5*^ a little shorter than 6*^, 

 which is not expanded, but a little produced at apex, yet not enough to make 

 a chela with the short apically toothed finger. Peraeopods 1 and 2 very like 

 the gnathopods 1 and 2, except as regards the 4*^ Joint. Peraeopod 5 much 

 the largest. Telson nearly au equilateral triangle, with a setule on either 

 side of subacute apex. Colour yellow. L. 3 mm. 



Lytfelton Harbour [New Zealand]. 



