ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 210 
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 antennz, 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 Lovén, of comparing the individuals here de- 
scribed of this species and of A. levigata with Bohuslin examples, and 
thus am enabled to speak positively as to their identity. 
Ampelisca carinata, Bruzelius, Skand. Amphip. Gammarid. p. 87, pl. 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 Kréyer and Bruzelius). 
Head vertically truncate. Superior antenne a little longer than 
pedunele 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 banch of (? auditory) sete. Inferior antenne 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 antennz ; 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. equicornis, 
of which species I strongly suspect that it is the male. Shetland 
(A. M. N.); Kirkwall Bay, Orkney (Mr. D. Robertson); Aberdeenshire 
coast (Mr. Dawson). 
The species described by British authors as A. Giaimardi 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.” 
—— levigata, Lilljeborg, Ofvers. af Kong. Vetensk. Akad. Forhandl. 1855, 
p. 123; Bruzelius, Skand. Amphip. Gammarid. p. 84; Bate, Cat. Amphip. 
Crust.eBrit.. Mus. p. 96. 
Head much produced, squarely truncated in front. Superior antenn 
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- 
tenn with a very long peduncle, the last joint distinctly shorter than 
preceding. First and second pereiopods haying the nails very long, con- 
siderably longer than the two preceding joints combined. Last perelopods 
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 seti; meros produced backwards and downwards 
