Cumacea: 6. Chalarostylidae, 1. Chalarostylis, 2. Hemilamprops 55 



backwards. Pleon quite smooth; telson only as long as the sixth and little 

 over half the fifth pleon segment, with 2 pairs of lateral and 3 apical spines. 

 Antenna 1, 1^^ joint spinose, especially below. Antenna 2 as long as cepha- 

 lothorax. strongly ciliated. Peraeopod 2 (in original description called 1^* by 

 ^rror) with slender 2»<i joint, not spined, 3'^ joint very short with 1 long spine, 

 4*^ longer with similar spine, 5*^ nearly as long as 3 preceding joints com- 

 bined and much longer than the 2 following together, armed with 10 spines, 

 2 of them much longer than the rest, Q^^ joint very short, one-third of 7^\ 

 Pleopods with long peduncle, and setose rami. Peduncle of uropods thrice 

 as long as telson, with 24 spines on the medial margin, endopod with 1^* 

 joint as long as the telson, 8 spines on medial margin, 2"^^ with 2, 3*^ with 

 no spines: exopod reaching middle of 3'^ joint of endopod. L. adult d rather 

 more than 8 mm. 



Off Eockall, depth 199 m. 



2. Gen. Hemilamprops G. 0. Sars 



1883 Hemilamprops, G. 0. Sars in: Forh. Selsk. Christian., nr. 18 p. 11, 55 i 1896 

 H.. J. Bonnier in: Ann. Univ. Lyon, u 26 p. 546, 549 | 1908 if., Zimmer in: Ergeb.Tiefsee- 

 Exp., V.8 p. 169, 171 I 1912 H., T. Stabbing in: Ann. S. Afr. Mus., v. lOv p. 144. 



Distinguished from Chalarostylis by the greater development of the telson. 



6 species. 



Synopsis of species: 



I Telson with more than 5 apical spines — 2. 



I Telson with not more than 5 apical spines — 3. 



f Eye large, red, with 8 lenses; telson with 8 apical spines 1. H. rosea 



^ \ Eye whitish, without lenses, telson with only 6 apical spines 2. H. assimilis 



f Eye wanting — 4. 

 \ Eye present — 5. 



I Telson with 5 apical spines 3. H. normani 



^ \ Telson with only 3 apical spines 4. H. pellucida 



{Carapace without pair of carinae curving round the frontal 

 \q\jq 5. H. cristata 

 Carapace with pair of carinae curving round the frontal 

 iQjjg 6. H. uniplieata 



1 . H. rosea (Norm.) 1863 Vaunthompsonia r. + Cyrianassa elegans, A. M. Norman 

 in: Tr.Tyneside Club, u5iv p. 271 t. 13 f.l— 3 9; p.275 1. 13 f.4— 9(5 | 1865 Lamprops 

 »•, G. 0. Sars in: Forh. Selsk. Christian., 1864 p. 189 [ 1883 Hemilamprops r., G. 0. 

 Sars in: Forh. Selsk. Christian., 1882 p. 11, 55 | 1897 H r., T.Scott in: Rep. Fish. 

 Board Scotl., v. 15 p. 134 | 1899 H. r., G. 0. Sars, Crust. Norway, v.3 p. 22 t. 12—14 | 

 1900 H. r., T. Scott in: Ann. Scott, uat. Hist., v. 9 p. 219 | 1905 H. r., Caiman in: Sci. 

 Invest. Fish. Ireland, 1904 app. 1 p. 41. 



Integument thin, semipellucid. Carapace, especially in Q , shorter than 

 the group of pedigerous segments, dorsal line straight, horizontal, sides 

 smooth, pseudorostral projection almost obsolete. Second and third pedigerous 

 segments the largest. Telson rather broad, lamellar, equal in length to peduncle 

 of uropods, not rapidly narrowing to the rounded apex, which carries 4 pairs 

 of spines, the outermost the longest, lateral margins generally with 2 pairs 

 of setiform spines. Eye large, round, red, with 8 lenses. Antenna 1 with 

 principal flagellum 3-jointed, its 1^* joint in the d having a fascicle of 6 setae, 



