Curaacea: 11. Diastylidae, 2. Brachydiastylis, 3. Diastylopsis 



109 



setose, principal flagellum 4-joiiited, small accessory 2-jointed. Antenna 2 

 of 4 joints, none elongate. Peraeopod 1. 2"^ joint much shorter than rest 

 of limb, with 3 strong teeth on distal part of medial margin, 5*^ and 6*^^ 

 joints equal, each much longer than 

 the 7*'^; peraeopod 2 short. 5^^ joint 

 not equal to i6^^ and 7^'' com]»ined: ^ 



3^ and A^^ pairs stout, with 5*^ joint 

 liroad but shorter than the 4^^ Endo- 

 pod of uropod about as long as the 

 peduncle, rather over Va*^^ '^^ long as 

 the setose exopod, with only a single ilj^ 



spinule on each of its 3 joints, the '^-^' 



apical spine long. Colour lu'ownish grey. 

 L. about 5 mm. 



cT. Pseudorostral lobes nearly 

 .iV;^iLl, horizontal with setules at apex, autero- . ^„ 



' ^ ' ' lateral corners rectangular, unarmed, / m\ 



the carapace smooth. Pedigerous seg- 

 ment 5 with postero-lateral corners 

 ^1 M' acutely produced. Pleon segments 



1 — 3 each with medio-ventral denticle, 

 5th segment longer than 6*^'', telson 

 i\ Y4 \H scarcely shorter than peduncle of uro- 



pods. Antenna 1, principal flagellum 

 6-jointed, accessory not very small, 

 3-jointed; peraeopod 2 with 2"*^ joint 

 large, the slender 5*^^' much longer 

 than lo^^ and 7^'^ comliined. L. 6 mm. 



\ 



Fig. 64. 



B. resimus (J) (Kioyer), 

 peraeopod 2 (after Sars). 



Arctic, N.Atlantic, Norway, Denmark, 

 depth 6—128 m. 



Fig. 65. 

 B. resimus (cJ) 



(Kroyer), uropod 

 (after Sars). 



3. Gen. Diastylopsis S. I. Smith 



1880 Dinsfylopsis, S. I. Smith iu: Rep. geol. Surv. Canada, app. D. p. 215B j 

 1893 D., T. Stebbing in: Int. sci. Ser., r. 74 p. 311 | 1900 D., G. 0. Sars. Crust. Norway, 

 v.'d p. 64 I 1900 D., Zimmerin; Fauna arctica, v. I p. 426 | 1908 Z)., Zimraer in: Ergeb. 

 Tiefsee-Exp., v. 8 p. 181, 189 ] 1909 D., Ziramer in: Ergeb. Schwed. Sudpol.-Exp., v.Q 

 nr. 3 p. 25 | 1911 D., Cabuan in: Tr. zool. Soc. Loudon, u 18iv p. 366, 378 | 1912 D. 

 Caiman in: P. U. S. 3ius., v. 41 p. 662 [ 1912 !>., T. Stebbing iu: Ann. S. Afr. Mus., 

 ulOv p. 1 46, 147. 



Pseudorostral lobes of female not strongly upturned with antero-lateral 

 corners usually produced. Carapace slender. First three pedigerous segments 

 dorsally short, fourth dorsally long, third and fourth with a tendency to 

 coalesce, their sides strongly outdrawn backwards, so that in the female the 

 second and third peraeopods are wide apart. Eye wanting. Second joint of 

 third maxilliped distally widened. Third and fourth peraeopods in female 

 Avith rudimentary exopods; last three pairs of peraeopods stout. 



8 species accepted, 2 doubtful. 

 Synopsis of accepted species: 



I Telsuu much shorter than peduncle of uropods — 2. 

 \ Telsou not much shorter than peduncle of uropods ■ — 5. 



