ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 277 



not very broad or much flattened. Infero-posteal angle of third seg- 

 ment of pleon not produced. Last uropods much longer than preceding 

 pairs ; branches about half as long again as peduncle. Telson cleft nearly 

 to the base, equal in length to the penultimate uropods, and reaching 

 to one-third the length of the rami of the last pair. 



A smaller species than the last, distinguished by the oblique truncation 

 of the extremity of the head, and by the slenderness of the antennae, and 

 their great difference in length. It is usually prettily painted with lilac 

 or rose-colour about the lower parts. Shetland, Skye, Guernsey (A.M.N.), 

 and Aberdeenshire (Mr. Dawson). I have had the opportunity, through 

 the kindness of Professor Loven, of comparing the individuals here de- 

 scribed of this species and of A. Icevigata with Bohuslan examples, and 

 thus am enabled to speak positively as to their identity. 

 Ampelisca carinata, Bruzelius, Skand. Amphip. Gammarid. p. 87, pi. 4. fig. 

 16 ; Bate, Cat. Amphip. Crust. Brit. Mus. p. 371, =Ampelisca Gaimardi, 

 Bate, Cat. Amphip. Crust. Brit. Mus. p. 91 ; Bate and Westwood, Brit. Ses- 

 sile-eyed Crust, p. 127 (but not A. Gaimardi of Xroyer and Bruzelius). 



Head vertically truncate. Superior antennae a little longer than 

 peduncle of inferior; peduncle reaching middle of penultimate joint of 

 peduncle of inferior ; second joint scarcely longer than first ; third joint 

 about one-third as long as second ; lower side of whole peduncle beset 

 with numerous transverse tufts of short hair; first joint of filament 

 larger than usual, looking more like a joint of the peduncle, furnished 

 below with a bunch of (? auditory) setas. Inferior antennas extremely 

 long, equalling whole length of animal; upper margin of peduncle 

 clothed with transverse rows of tufted hair, similar to those on lower 

 side of superior antennas ; last joint nearly half as long again as penul- 

 timate ; filament very slender. Nails of first two pairs of pereiopoda not 

 longer than two preceding joints combined. Two last segments of pleon 

 (fifth and sixth are coalesced into one) elevated dorsally into very con- 

 spicuous humps, In other respects agreeing closely with A. cequicornis, 

 of which species I strongly suspect that it is the male. Shetland 

 (A. M. N.) ; Kirkwall Bay, Orkney (Mr. D. Eobertson); Aberdeenshire 

 coast (Mr. Dawson). 



The species described by British authors as A. Gaimardi is unques- 

 tionably the A. carinata of Bruzelius ; the true A. Gaimardi, according 

 to that author's characters, differs from all British forms in the structure 

 of the last uropods and telson. " Pedes abdominis ultimi paris duo 

 paria antecedentia haud superantes. Appendix caudalis brevis, lata, 

 parum fissa." 



Icewgata, Lilljeborg, Ofvers. af Kong. Vetensk. Akad. Porhandl. 1855, 



p. 123 ; Bruzelius, Skand. Amphip. Gammarid. p. 84 ; Bate, Cat. Amphip. 

 Crust. Brit. Mus. p. 96. 



Head much produced, squarely truncated in front. Superior antennas 

 very short, not reaching end of penultimate joint of peduncle of inferior ; 

 second joint of peduncle half as long again as first, third joint closely 

 resembling joints of filament, which are only about six. Inferior an- 

 tennae with a very long peduncle, the last joint distinctly shorter than 

 preceding. First and second pereiopods having the nails very long, con- 

 siderably longer than the two preceding joints combined. Last pereiopods 

 having the posterior lobe of the basos produced downwards to the distal 

 extremity of the following joint, truncate inferiorly, and closely fringed 

 with long plumose setce; meros produced backwards and downwards 



