60 Cumacea: Bodotriidae, 9. Cumopsis 



Synopsis of species: 

 f Carapace with 2 pairs of latero-dorsal arcuate folds ... 1. C. goodsir 

 \ Carapace without lateral folds 2. C. longipes 



1. C. goodsir (Bened.) ?1856 Cuma edivardsii (err., non Kroyer 1846), Bate in; 

 Ann. nat. Hist., ser. 2 «. 1 7 p. 457 t. 14 f. 4 | ? 1859 Vaunthomsonia e., Bate in : Ann. 

 nat. Hist., ser. 3 u3 p. 273 | 1861 Bodothria goodsir, P. J. Beneden in: Mem. Ac. Belgique, 

 v.SS [nr. 3] p. 76, 77, Bodotria goodsirii, p. 142, 166 1. 13 f. 1 — 16 | 1865 Bodotria goodsirii, 

 Fr.Miiller in: Arch. Naturg., v.31i p. 311— 323 | 1869 Cuma goodsiri, A.Dohrn in: Jena.Z., 

 V.5 p.56, 61,63, 71,75, 76 t. 2; t. 3 f. 16, 17 | 1878 & 1879 Cumopsis g., G. O.Sars in: Arch. 

 Naturv. Kristian., v. 3 p. 512; u 4 p. 1 t. 19—21 | 1906 C. g., A. M. Norman & T. Scott, 

 Crust. Devon Cornwall, p. 30 | 1909 C. g., Stappers in: Cellule, u 25 p. 355. 



Integument thin, flexible, finely squamose. Pseudorostral lobes meeting 

 a short space in front of eyelobe; antero-lateral corners shortly produced 

 in Q with adjoining excavation, not produced in d. Carapace with level 

 dorsal line, not carinate, but from the antero-lateral corners 2 pronounced 

 folds sweep round towards the centre, there joining a half elliptical fold 

 which extends from behind the frontal lobe nearly to the hind margin. Pedi- 

 gerous segment 1 exposed dorsally, laterally covered by the 2"^ segment 

 (carapace leaving the five posterior segments exposed as complete rings in 

 themselves. Bate), "2^^ segment having near the first a pair of semicircular 

 dorsal folds. Telsonic segment short, truncate. Eyelobe nearly heart shaped, 

 with dark eye and several corneal lenses. Antenna 1 with joints of peduncle 

 successively shorter, in d distally widened, both flagella 2-jointed, the accessory 

 minutely, the principal distinguished in the 6 by its swollen base and verti- 

 cillate equipment of radiating pellucid filaments. Antenna 2 in 9 2-jointed, 

 without setae on 1^* joint, in d the short-jointed flagellum reaching beyond 

 the body. Lower lip with slender spines on the incurved apices. Maxilli- 

 ped 3, 2«*i joint large and broad, longer than rest of limb, its lateral apex 

 carrying 5 plumose setae, 4*^ joint little produced, with 2 setae on lateral 

 apex. Peraeopod 1 comparatively short, 2°^ joint large, narrowing distally, 

 6*^ joint shorter than b^^. Peraeopod 2 very small, with one joint missing 

 (the 2 anterior thoracic legs extremely long, the three posterior extremely 

 short, and all except the last having an exopod, Bate). Peraeopods 2 and 

 3 each with a very small rudimentary exopod carrying 3 short setae. Peduncle 

 of uropods very slender, much longer than the equal, linear rami, in which 

 the 1^* joint of the exopod is as long as the 2'^^ ^f the endopod; armature 

 in spines and setae very much greater in the d. Colour dark violet, darkest 

 on hinder and lower part of carapace and b^^ pleon segment. L. 5 mm, 



British Isles, Belgium, Mediterranean. Sea-shore and surface of sea. 



2. C. longipes (A. Dohrn) 1869 Cwna l, C. {Bodotria) l, A. Dohrn in: Jena. Z., 

 V. 5 p. 77; p. 81 t. 3 f. 1 I 1879 Cumopsis laevis, G. 0. Sars in: Arch. Naturv. Kristian... 

 vA p. 8 t. 22 I 1893 C. l, T. Stebbing in: Int. sci. Ser., u 74 p. 303 | 1906 C. l, A.M. 

 Norman & T. Scott, Crust. Devon Cornwall, p. 29. 



Very like C. goodsir, but carapace without lateral folds, having only 

 the semi-elliptical fold behind the frontal lobe; 2'^'^ pedigerous segment quite 

 smooth; antenna 1 of 9 more elongate, with 2^* joint scarcely shorter than 1^*; 

 antenna 2 of 9 with 1 plumose seta on 1^* joint; peraeopod 1 comparatively 

 longer and stronger, with 6*^ joint subequal to 5*^; uropods comparatively 

 longer; colour in 9 more intense. L. 6 mm. 



British Isles (Clyde, S.Devon, on shore sands); Mediterranean (Syracuse, Naples, 

 Spezia); Bayonne Harbour. 



