AMPHIPOD GENUS LBPTOCHEIRUS. 569 



cluster of setiform spines at the apex ; inner ramus with 1 spine 

 midway, and 1 spine and 2 setse at the apex ; the large animals 

 have more spines ; all the spines are short and stoat, each with 

 an apical filament. The outer ramus is 2-jointed, the terminal 

 joint rudimentar}', cnrrying 1 long serrate spine or bristle, 



Telson (figs. 25 & 26) short, broader than long, depressed 

 in the middle between the prominent lateral angles ; apex 

 rounded; 1 seta and 1 ciliated sensory hair on eacli angle, and 

 a pair of small ciliated hairs on either side. 



Colotir described by Zaddach as " flavescens, dorso punctis 

 nigricantibus sparso." In both his specimens and Norman's the 

 colour has faded, but in Chevreux's it is still fresh and vivid. 

 The whole animal is a beautiful golden yellow tint with stellate 

 markings in dark brown, These markings extend over tlie whole 

 dorsal surface of the head ; the anteiior margin of the 1st, and the 

 posterior portions of the 3rd -7th perfeon-segments and the 1st 

 pleon-segment are banded with them. The 5th and 6th pleon- 

 segments and the telson are entirely covei'ed. An ii'i-egulai' band 

 of brown runs along each side of the pei'peon just above the side- 

 plates and is continued along the epimei-a of the pleon to the 

 telson. All the .side-plates and tlie posterior expansions of the 

 basal joints of the liinder per^eopods have each a patch of brown. 



Distribution : — * 



Geserich See, Prussia : and the Baltic : Zaddach (53) as 



L. pilosus, and (54) as Protomedeia pilosa. 

 Baltic : Greifswalder Bodden, Miiller (32) as L. pilosus. 

 Baltic : Mbbius (30) as Leptocliirus pilosus, depth 1-10 fms. ; 



bottom, zostera and ulva. 

 R. BuRE, Norfolk, England : Norman (38) as L. suhsalsus. 

 The BosPPiORUS : Sowin.ski (41) as L. cornuaurei. 

 Coast of Algeria : Chevreux (18) as L. cornuaurei. 



Leptocheirus pinguis )Stimpson. (Plate XVIII. figs. 10-12.) 



For synonymy see Stebbing, Das Tierr. pp. 627 &, 738, and 

 Norman (38) p. 309. 



There is little to add to the summary of characters given bj^ 

 Stebbing. The few notes subjoined were taken from three slides 

 kindly lent to me by Canon Norman, and prepared by him from 

 specimens from Vineyard Sound and Long Island, N. America. 



Head, 2 j lateral corners not much produced, truncate. 



Superior Antenna. — 1st and 2nd joints in (^ and $ practical!}- 

 subeqvial to each other in length ; 3rd a little more than one- 

 third as long as 2nd. Primary JlageUum, $, broken, 21 joints 

 remaining, all, except the first 6, with a small sensory filament 

 and short setae ; 6 very long joints in the accessory flagellum which 

 equals 3 joints of the primary in length. In the male, the primary 

 flagellum is composed of 31 joints, each, except the first 5, with 

 a small sensory filament. The accessory is broken, 6 joints 

 remaining, equalling 5 joints of the primary in length. 



