162 



Cumacea: 22. Gynodiastylidae, 1. Gynodiastylis 



apparently much as in G. carlnatus. Peraeopod 1, 2"*^ joint nearly twice as 

 long as rest of limb, distally produced as a strong tooth, 6th half as long 

 as 5*^ with only 3 long setae on the sub-distal margin, 7th 2/3 ^s of 6">. 

 Peraeopod 2, 6*^ and 7^'^ joints subequal, together shorter than 5*^. Peraeo- 

 pods 3, 4 without exopods in either sex. Peduncle of uropods -/^^^ of 6^^^ 

 pleon segment, exopod about as long as peduncle (text), shorter in fig., endo- 

 pod simple, a little longer than the exopod. L. 9 4-1 mm, 6 (? adult) 2'4mm. 

 N. Zealand, Lyttleton Harbour, depth 2 — 9 m. 



Fig. 111. 



G. laevis (?) Caiman, 



telson and uropod. 



Fig. 112. 

 G. carlnatus (cj) Cai- 

 man, telson and uropod. 



2. G. earinatus Calm. 1911 G. carinata, Caiman in : Tr. zool. Soc. London, ul8iv 

 p. 342, 367, 388 t. 35 f. 6— 31 | 1912 G. carlnatus, T. Stebbing in: Ann. S. Afr. Mus., 

 V. lOv p. 146. 



Pseudorostral lobes with edges acute, but apex truncate, sinus defined 

 by slightly produced antero-lateral tooth in Q, by rounded slightly serrate 

 projection in 6. Carapace with 5 or 6 paii'S of longitudinal ridges, eyelobe 

 less than twice as broad as long. Of the pedigerous segments all b m 6 , 

 last 2 in 9 , have a pair of longitudinal dorso-lateral ridges, segment 3 has 

 the side-plates expanded forwards and backwards, the attachment of the 

 limbs in the Q widely separating the 2"^ and ?>^ pairs. Pleon with pair of 

 lateral ridges. Pleon segment 5 in o not much longer than the 6*^: telson 

 2/3<i^ as long as the preceding segment, ovate, the bluntly pointed apex having 

 2 extremely minute setiform points. Eye without pigment, but with 3 large 

 corneal lenses. Antenna 1 of Q with 2"^ joi^t of peduncle much the shortest, 

 both flagella very small. Antenna 2 of Q short, 3- or 4-jointed, in the <5 

 very short, the large setose terminal joint of the peduncle being nearly as 

 long as the 8-jointed flagellum. Maxilliped 1 almost or quite without 

 branchial leaflets. Peraeopod 1, ^""^ joint about V4"'' of rest of limb, h^^ more 

 than twice the 6**^, which is less than twice the 1^^^ and carries on the 

 oblique subdistal border a series of 10 remarkably long smooth setae. Peraeo- 

 pod 2 with last 3 joints subequal in length. Peraeopods 3, 4, without 

 exopods in either sex. Peduncle of the uropods a little shorter than pleon 

 segment 6, exopod about Ye*^^ of peduncle, endopod about Vs*^^ of exopod in 

 the 9, its 2"^^ joint not half as long as the P*, but in 6 the peduncle is 

 not longer than the exopod, this being little longer than the endopod, in 

 which the 2°'^ joint is nearly as long as the P^ L. 9 4 mm, 6 2-85 mm. 



N. Zealand, Lyttleton Harbour, depth 2 — 9 m. 



