Rev. A. M. Norman's Notes on British Ampliipoda. 121 



greater or less size. Epimera rather small, Antennules and 

 antennce long and slender, subequal in length. G nathopods 

 of both pairs long and slender ; hands small, subchelate. 

 Perceopods also long and slender, the three hinder pairs with 

 the thighs only slightly dilated. Last uropods much longer 

 than the two preceding pairs. Telson long, more or less 

 deeply cleft. {Boeck.) 



Alelplndippa macra, Norman. 

 (PI. X. fig. 14, and PI. XII. tigs. 4-7.) 



1868. Atylm macer, Norman, Last Report Dredging Shetland, Brit. 



Assoc. Rep. p. 280. 

 1870. Meljjhidippa lo)u/ipes, A. Boeck, Crust. Ampliip. bor. et arct. 



p. 139. 

 1870. Melphidippa Jongipcs, Boeck, De Skand. og Arkt. Amphip. 



p. 414, pi. xxiv. fig. 5. 



Pleon having the posterior margin (PI. X. fig, 14) of the 

 first five segments serrated right across the back, with a large 

 central hastate tooth, which increases in size from the first to 

 the fourth segment, where it attains its greatest development. 

 First g nathopods (PI. XII. fig. 4) with wrist and hand sub- 

 equal in length, somewhat fusiform, the former the broader: 

 hand widest in the middle, front margin gently convex, no 

 defined palm, finger half as long as the hand, slender. Second 

 gnathopods (PL XII. fig. 5) with wrist and hand subequal, 

 long, and narrow ; hand narrow, fully four times as long as 

 broad, margins subparallel, with four or five long seta3 on 

 dorsal and about five fascicles of shorter setae on front mar- 

 gin ; palm oblique, nail with a seta on outer and a group of 

 about tliree seta3 on inner margin. Perceopods excessively 

 long and delicate, basos of posterior pairs (PI. XII. fig. 6) 

 very long, narrow, linear ; meros and carpus both very long 

 and slender (PI. XII. fig. 7) and both longer than the long 

 propodos ; nail very slender, half as long as the propodos, 

 with a single seta beyond the middle on the inner margin. 

 Uropods very long, the last pair Avith peduncle and branches 

 subequal, the total length equal to four segments of pleon 

 (?*. e. third to sixth). The eye is situated unusually low 

 down and opposite the base of the antenna3. The antennules 

 and antennas are broken off in my specimens ; Boeck says of 

 the former " flagello accessorio brevissimo, fere obsoleto," and 

 thus describes the telson : — " Appendix caudalis ultra medium 

 fissa ; laciniis in apice rotundatis." Length 5 millim. 



Hab. St. Magnus Bay, Shetland, 60 fatli,, muddy bottom, 

 1867 [A. M. N.). 



