Cumacea: 11. Diastylidae, 7. Leptostylis, 8. Ekleptostylis, 12. Colurostylidae 129 



as the shortest, though uot so figured, spines on the medial margin respect- 

 ively 2. 1. 1, the exopod a little longer than first 2 joints of endopod combined. 

 L. (5 6 mm, 9 unknown. 



Off S. of Nova Zembla, depth 90 m. 



8. Gen. Ekleptostylis Stebbiug 



1912 Ekleptostylis, T. Stebbing in: Ann. S. Afr. Mus., v. 10 v p. 146, 153. 



Near to Leptostylis (p. 123), but the telson with many lateral spines and 

 in the male having a lobe broadly laminar produced over the base of the 

 terminal section and the anal valves each ending in a little tooth, and 

 peduncle of first antennae with its three joints of equal length. 



1 species. 



1. E. walkeri (Calm.) 1907 Leptostylis w., Caiman in: Bull. Mus. Paris, p. 2, 

 7 tf.6— 9 I 1911 L. w., Caiman in: Tr. zool. See. London. v.lSiv p.366 | 1912 Ekleptostylis 

 w., T. Stebbing in: Ann. S. Afr. Mus., «. lOv p. 153. 



General form and proportions as in Leptostylis villosus (p. 125), but 

 beside generic differences pseudorostral lobes a little more salient, teeth of 

 lower margin of carapace less distinctly 

 squared, and its surface carrying only some 

 long scattered setae, that of the 6 having a 

 longitudinal denticulate carina on each side 

 as in L^eptostylis macrurus (p. 12B). The telson 

 is about Vs^*^** of *^6 length of the 6*^^ pleou Fig. 84. 



segment, in the 9 having about 14 pairs of ^- ^^'^^^^^ (c?) (Caiman), teisou. 

 lateral spines, with an unusually conspicuous 



setule issuing from the side of each spine: in the d the spines are larger but only 

 5 pairs with smaller setules. Peraeopod 1, 2^^ joint less than half the total length 

 of the limb. 5^'^ joint y^^^ of 6*^ 6"^ thrice as long as the 1^\ Peduncle of 

 uropods nearly twice and a half as long as the telson, with some 23 spines 

 on the medial margin; endopod a little longer than exopod, Va*^^ ^s long as 

 the peduncle, 1^* joint nearly twice 2^^'^, a little longer than 3*^, spines on 

 medial margin respectively 7, 2, 1. L. ovigerous 9 0*5 mm. 



Bay of Biscay, depth probably 100 m. 



12. Fam. Colupostylidae 



1912 Colurostylidae, T. Stebbing in: Ann. S. Afr. Mus., v. 10 v p. 143, 146. 



Side-plates of pedigerous segment 3 produced backwards. Telson small, 

 blunt, without apical spines. Antenna 1 with accessory flagellum small in 

 male, very small in female. Antenna 2 of female 3- or 4-jointed. Palp 

 of maxilla 1 ending in 2 filaments. Peraeopods 1-4 with exopods in both 

 sexes, but those of the 3^ and i^^ pairs in the female rudimentary. Only 

 2 pairs of pleopods in the male. Endopod of uropods 2- or 3-jointed. 



2 genera. 



Synopsis of genera: 



f Endopod of uropods 2-jointed 1. Gen. Colurostylis 



\ Endopod of uropods 3-jointed 2. Gen. Anchicolurus 



Das Tierreich. 39. Lief.: T. R. R. Stebbing, Cumacea. 9 



