130 Cumacea: 12. Golurostylidae, 1. Colurostylis, 2. Anchicolurus 



1. Gen. Colurostylis Caiman 



1911 Colurostylis, Caiman in: Tr. zool. Soc. London, r. 18iv p. 342, 376 | 1912 

 C, T. Stebbing in: Ann. S. Afr. Mus., v. 10 v p. 146. 



Side-plates of pedigerous segments 3 and 4 produced backwards. An- 

 tenna 2 of female 3-jointed. Maxilliped 3 with apex of 2^^ joint a little 

 produced. Peraeopod 2 with 7*^ joint longer than 6*^^. Endopod of uro- 

 pods 2-jointed. 



1 species. 



1. C. pseudocuma Calm. 1911 C.j)., Caiman in: Tr. zool. Soc. London, v. 18iv 

 p. 342, 376 t. 36 f . 23— 36 | 1912 C. p., Caiman in: P. U. S. Mus., n41 p. 674 | 1912 

 C. p., T. Stebbing in: Ann. S. Afr. Mus., v. 10 v p. 146. 



Pseudorostral lobes straight, acute, scarcely raised, sinus obsolete, antero- 

 lateral corner rounded. Carapace pitted. Backward curvature of the side- 

 plates of 3*^ pedigerous segment in 9 separates 3*^ peraeopods widely from 

 the 2°^. Length of telson about ^/gds of preceding segment in Q, ^4*^^ ^^ <^* 

 Eye without pigment. Antenna 1 in 9 with 3-jointed flagella, the accessory 

 very small, in the (5 the 3^ joint of peduncle as broad as long, with brush 

 of sensory filaments, the flagella 4-jointed, the accessory not quite so small 

 as in the 9 . Antenna 2 of 9 3-jointed, flagellum in d elongate. Mouth- 

 parts resembling those in Pseudocuma (p. 148). Mandible with about 9 spines- 

 in spine-row. Maxilliped 3 with about 4 plumose setae on the expanded 

 and slightly produced apex of the 2"*^ joint. Peraeopod 2 with 7*^^ joint 

 longer than 6*^, but not twice as long. Exopods on peraeopods 3 and 4 

 of 9 2-jointed, attached near the base of the 2"*^ joint and nearly half its 

 length. Rami of pleopods very small. Peduncle of uropods in 9 more 

 than twice, in d nearly thrice, as long as 6^^ pleon segment, in the 9 a. 

 little, in the cJ much, longer than the subequal rami, of which the endopod 

 has a first joint not quite so long as the 2"'', both fringed with setae or 

 spines. L. 9 2-3 mm, d 2*7 mm. 



New Zealand, Lyttleton Harbour, depth 2 — 9 m; Akaroa Harbour, depth 11 m 



2. Gen. Anchicolurus T. Stebbing 



1912 Cohirostylis (?), Caiman in : P. U. S. Mus., vA\ p. 605, 670 | 1912 Anchicolurus^ 

 T. Stebbing in: Ann. S. Afr. Mus., v. 10 v p. 176. 



Side-plates of pedigerous segment 3 produced backwards. Antenna 2 

 of female 4-jointed. Maxilliped 3 with apex of 2"*^ joint expanded but not 

 produced. Peraeopod 2 with 6*'' joint longer than seventh. Endopod of 

 uropods 3-jointed. 



1 species. 



1. A. oeeidentalis (Calm.) 1912 Colurostylis (?) occidentalism Caiman in: P. U, 

 S.Mus., 't;.41 p. 605, 670 tf. 100—112 | 1912 Anchicolurus 0., T. Stebbing in: Ann. S. Afr. 

 Mus., u lOv p. 176. 



Pseudorostral lobes meeting in front of the small eyelobe, antero- 

 lateral corners acute in both sexes. Carapace with 4 paks of oblique ridges. 

 1^^ pedigerous segment only dorsally exposed, 2^*^ with side-plates greatly 

 expanded and marked by an incision of the front margin, those of the 3** 

 segment overlapping the 2^*^ side-plates above and produced backward below,. 

 3*^ and 4*^ segments with medio-dorsal carina, side-plates of i^^ marked by 



