occurring on the Norwegian Coasts. 413 



setae. The maxilHpedcs are very strong, and their palpi four- 

 jointed. Respiratory sacs occur at the base of the second to 

 the sixth pair of legs. The greater part of the antennas was 

 wanting in tlie described sjiecimen. 



Hela monsfrosa, niihi. — Head broader tlian long, elongated 

 in front into a small rostrum. On each side of the base of the 

 inferior antenme there is a spine. Tlie first joint of the infe- 

 rior antennas is large and spherical, and emits a sti'ong olfac- 

 tory spine from its lower surface. The third joint extends as 

 far out as the first joint of the superior antennas. The fifth 

 joint or hand of the first pair of legs is shorter than the pre- 

 ceding, and triangular, its posterior inferior side fimiished 

 with three strong teeth. Finger long, cm-ved, and ciliated on 

 the convex side. The hands of the second pair are smaller 

 than those of the first pair, and without teeth. The third joint 

 in the two following pairs is as long as the first ; the fourth 

 and fifth are equal in length. In the following pair the fourth 

 joint is shorter than the fifth, which in the two succeeding 

 pairs increases still more in proportion to the fourth. The 

 animal is more than 30 millims. in length, and was found at 

 a depth of 30 fathoms off Holmestrand. 



Tribe IV. Caprellidea. — Kroyer has made Milne- 

 Edwards's L^emodipoda into a family under the Amphipoda ; 

 and later systematists have followed him in this view. Spence 

 Bate thinks that this section does not stand so near the other 

 two as they do to each other ; but this is certainly not the 

 case. Kroyer saw perfectly that most of the characters upon 

 which they have been separated from the Gammarinas cannot 

 be accepted as of that importance ; and only the rudimentary 

 abdomen and the want of epimera separate them from that 

 group. But in a new species of the genus ^gina the origin 

 of the feet and the respiratory vesicles are covered by some 

 very large, strong, and spinous ])rocesscs, Avliich greatly re- 

 semble small adnate epimera. In tlie sta-ucture of the buccal 

 organs, this tribe agrees much more with the Gammaridea 

 than these with the Hyperidea. Particular s])ecies of the 

 families Corophiidas and Dulichiidas furnish, in the form of their 

 body, transitions to the tribe Caprellidea. 



Proto^ Leach. — Proto pedafa occurs along the whole of our 

 coast, but is not abundant anywhere. 



ProtcUa, Dana. — To this gtMuis l)elongs KriJA'cr's species 

 P. {^gina) Iongts])innj taken by CErsted at Drobak and by 

 Sars at Manger, sitting ii])on Plumularia pinnata, at a depth 

 of 30 fathoms. Spence Bate cites it also from the English 

 coast. 



