172 



Occurrence. — I have met with thi.s form rather abundantly in several 

 places, both oflF the south and west coasts of Norway, and northwards to the 

 Trondhjemsfjord. It is a more ])ronouneed deep-water species tlinn .1. Josvifjata, 

 occurring only in depths varying from 50 to 150 fatlmms, iiiudd\- buffdni. 

 Out of Norway, it has not yet been recorded. 



<i Ampelisca macrocephala LiUjeborg. 



(PI, GO, Hg. Ij. 

 AmpHisca macrocephaln , LiUjeborg, Ofvers. af Kgl. Vet. Akaii. FcirliaDcU. 1862, p. 7. 



Cephalon fully as long as the 3 anterior segments of mesosome com- 

 bined, and gradually tapering anteriorly, frontal part rather ])roduced, and 

 oliliquely truncated at the tij). First jiair of coxal plates lint slightly expan- 

 ded distally, and scarcely broader than the 2 succeeding ones ; 4th pair much 

 more deep than broad, with the lowei' edge consideralily shorter than the hind 

 margin. Last pair of epimeral ]ilates of metasome produced at the lateral 

 corner.s to a strong spiniform projection, posterior edge forming a nmnded 

 lobe in the middle. First segment of urosome having dorsally a slight trans- 

 verse depression, more distinct in the male, and behind it a low carina ter- 

 minating with a slightly projecting angle. Corneal lenses very small, though 

 distinct, the lower pair occupying the inferior corners of the front; underlying 

 pigment somewhat irregular in form and bi'iglit red. .Suiierinr antennge in 

 female alxiut the length of the cephalon and the 2 anterior segments of meso- 

 some combined, and reaching to the end of the peduncle of the inferior ones, 

 flagellum twice the leiigth of the jieduncle, and composed of about 12 arti- 

 culations; those in male, as usual, more elongated and slender, reaching con- 

 siderably l)e.yond the jieduncle of the inferior ones. The latter in female 

 scarcely exceeding half the length of the body, last joint of the peduncle 

 shorter than the penultimate one. (Tuathopoda rather slender and feeble, 

 projjodos of the anterior ones about the length of the carpus, and very slightly 

 dilated in its outer part, that of the posterior ones very narrow, and scarcely 

 lialf as long as the carpus. Dactylus of the anterior pairs of pereio])oda 

 aboirt the length of the 2 precetling joints combined. Last ])air of pereiopoda 

 with the basal joint about equalling in length the remaining ])art of the leg, 

 ])Osterior expansion rather broad, and trans\'ersely truncated at the tip, ischial 

 joint short, meral joint forming at the end ])osteriorly a rather small, deflexed 

 l(il)c, fringed with delii.'ate setpe, carpal joint heart-shaped, with o long ciliated 

 setae originating from the posterior corner, ])roi)odal joint oldong, tapering 

 distally, and scarcely longer tlian the 2 preceding joints combined, dactylus 

 about half its length. Last pair of uropoda with the rami broadly lanceolate, 



