Uumacea: 17. Pseudocumatidae, 6. Pseudocuma 149 



corneal lenses. Second antenna of female very small, one-jointed, with a 

 single apical seta. Peduncle of uropods not very short. Hepato-pancreatic 

 glands AYith two pairs of lobes. 



4 species accepted, 1 obscure. 

 Synopsis of the accepted species : 



/ Carapace without lateral folds 1. P. cercaroides 



\ Carapace with lateral folds — 2. 



f Pseudorostrum with antero-lateral corners denticulate . 2. P. simile 



\ Pseudorostrum with antero-lateral corners not denticulate — 3. 



I Antenna 1 with third joint longer than the second . . 3. P. longicorne 



[ Antenna 1 with third joint shorter than the second . . 4. P. ciliatum 



1. P. cercaroides O. Sars 1894 P. c, G. 0. Sars in: Bull. Ac. St.-Petersb., 

 ser. 4 i-.4 (r. 36) p. 315 t. 5, 6 | 1900 P. c, G. 0. Sars, Crust. Norway, u 3 p. 73 | 1907 

 P. c, Lebediew in: Trudui St.-Peterb. Obshch., v.38i p. 95. 



Body short and stout, integument strongly incrusted, squamose. Pseudo- 

 rostrum rather prominent, level, subacute; antero-lateral corners small, ob- 

 tuse in 9, nearly quadrate in d. Carapace without median or lateral longi- 

 tudinal carinae but with sinuous ridges defining the branchial regions. Pedi- 

 gerous segments smooth, laterally well expanded, 1^* very short, the much 

 narrowed 5^^ with rounded postero-lateral corners. Pleon narrow, telson very 

 small, nearly semicircular. Eyelobe semicircular, with 3 distinct corneal 

 lenses, pigment rather dark. Antenna 1, 3*^ joint shorter than either of the 

 subequally long 1^* and 2^*^ joints. Maxillipeds 2 and 3 and the peraeopods 

 robust. Peraeopod 1, 2^"^ joint shorter than rest of limb; tip of peraeopod 

 2 not hooked; in the last three pairs the 4^^ joint is twice as long as the 

 b^^: the rudimentary exopod of the 3^ and 4*^ pairs in the Q is extremely 

 small but distinctly 2-jointed. Uropods rather short and in Q rather stout, 

 pedimcle having on medial margin 4 spines in 9, 5 in d, the subequally 

 long endopod with 4 spines in g , 9 in d together with fringe of fine cilia, 

 exopod considerably shorter. Colour yellowish. L. 5 mm. 



Caspian Sea. 



2. P. simile 0. Sars 1900 P. similis, G. 0. Sars, Crust. Norway, v. 3 p. 76 t. 53 | 

 1900 P. s., T. Scott in: Ann. Scott nat. Hist., v. 9 p.222 | 1902 P. s., T. Scott in: Rep. 

 Fish. Board Scotl., ?;. 20 p. 480 | 1903 P. s., Ziramer in: Zool. Jahrb., Syst. d. 18vi 

 p. 694 I 1905 P.S., Caiman in: Sci. Invest. Fish. Ireland, 1904 app. 1 p. 36 | 1906 P. s., 

 Gilson in: Mem. Soc. ent. Belgique, i?. 12 p. 78 tf. 4, 5, 7. 12, 15 (detailed comparison 

 with P. longicorne) | 1909 P. s., Stappers in: Cellule, *'. 25 p. 368 t. 1 f. 9a: t. 2 f. 20 | 

 1909 P. s., A. M. Norman & G. S. Brady in: Nat. Hist. Tr. Northumb., ser. 2 v. oil p. 34. 



Similar to P. lon<ilcorne (nr. 3), but larger and less slender, lobes of 

 pseudorostrum less prominent, antero-lateral corners armed in front with 3 

 denticles. Sculpture of carapace, eye, antennae, mouth-organs and limbs 

 about as in the species mentioned, but terminal joint of peraeopod 2 in c5' 

 with 2 denticles and a hook at the apex (Sars), 2 apical hooks and 1 sub- 

 apical (Gilson). Pleopod 1 of d with only 2 setae on medial margin of 1^* 

 joint, and pleopod 2 with only 1 spine on lateral margin. Pedimcle of 

 uropod longer than the subequal rami, endopod in 9 having about 6 spines 

 on medial margin, where the 6 has 12. Telson rather broader than long, 

 tnmcate in 9 . Colour light. L. 9 5 mm, d 5'5 mm. 



W. coast of Norway, depth 11— 22 m; North Sea; Scotland, E., W., N. £.; W. 

 coast of Ireland, shallow water; off N. E. England, depth 53 m. 



