128 



Cumacea: 11. Diastylidae, 7. Leptostyjis 



telson shorter than the (^^^ segment, with 1 pair of lateral spinules. Antenna 

 1 of 9 long. 1^* joint longer than 2"^, subequal to 3*^, accessory flagellum 

 much smaller in Q than in d. Antenna 2 in d. 2^^ joint subequal to 5*^'. 

 Peraeopod 1 very long, but 2"*^ joint scarcely longer than 5*^, much shorter 

 than ^i^^. (i*^ more than thrice the 7^^. Peraeopod 2, 1^^ joint longer than 5*^. 

 Exopods of 3^ and 4:^^ pairs in g 2-jointed. Pleopods with the short 1-joiuted 

 rami nearly equal. Peduncle of uropods about equal the 5^^ and 6*^'^ pleon 

 segments combined, longer than the endopod, in which the 1®* joint is longer 

 than 2"^ and 3*^ combined, spines on the medial margin respectively 3, 1, 1 

 in 9, 5, 1, 1 in d, exopod equal to first 2 joints combined. Colour whitish. 

 L. 9 5*5 mm, d about 5 mm. 



Coast of Norway, depth 56 — 188 m; N. America, Casco^^Bay. 



11. L. gracilis Stappers 1908 L. g., Stappers in: Arch. Zool. exper., ser. 4 v.8 

 notes p. 100 tt. 1 — 3 | 1911 L. g., Stappers in: Camp. arct. Orleans, Crust. Malac. p. 116 

 t. 5, 6 I 1912 L. g., T. Stebbing in: Ann. S. Afr. Mus., v. iOv p. 153 



Very near to L. lougimMuis, but peraeopod 1 with 2"*^ joint longer 

 than 5*'V^^*^ ^"^^ ^*^ joints combined, 6*^ twice and a half as long as the 7^^'; 



Fig. 82. 



L^-^acilis Stappers, part of left 



mandible. 



Fig. 81. 

 L. gracilis (J) Stappers. 



Fig. 83. 



L. gracilis Stappers, half 



of lower lip. 



peraeopod 2 with 7**^ joint as long as 5*^; pleopods with the small rami 

 very unequal, the shorter exopod being figured as 2-jointed instead of 

 1-jointed; in the uropods the 1^*^ joint of the endopod is much shorter than 

 the 2'^*i and 3*^ joints combined, ))ut longer than the 3*^, the 2"*^ being described 



