309 



integuments, and the slender pereiopoda, the dactylus .of which moreover is of 

 quite an unusual length. 



Occurrence. The species is rather commonly met with along the whole 

 coast of Norway, from the Christianiafjord to Vadse, occurring in some places, 

 as in the Trondhjemsfjord, even in great abundance. It is found in depths 

 varying from 10 to 100 fathoms, especially on soft bottom. By inadvertence 

 it was omitted in the list of Crustacea given in my 0versigt. 



Distribution. British Isles (Norman). 



16. Monoculodes tenuirostratus, Boeck. 



(PI. 109, fig. 2). 

 Monoculodes tenuirostratus, Boeck, Crust, amph. bor. & arct. p. 98. 



Very like M. Packardi, as to the outward appearance. Cephalon with the 

 upper contour forming a perfectly even and uninterrupted curve until the tip 

 of the rostrum, the latter very long and narrow, reaching nearly to the end 

 of the basal joint of the superior antennae. First pair* of coxal plates obli- 

 quely expanded distally; 3rd pair but little broader than the 2nd; 4th pair 

 somewhat deeper than the corresponding segment, distal edge strongly arcuate 

 in the middle, infero-posteal corners somewhat more produced than in M. 

 Packard). Eyes in alcoholic specimens but very faintly traced. Antennae 

 rather elongated, the superior ones attaining nearly half the length of the 

 body, 2nd joint of the peduncle much longer than the 1st, flagellum shorter 

 than the peduncle, and composed of about 12 articulations. Inferior antennas 

 scarcely longer than the superior, last joint of the peduncle not attaining the 

 size of the penultimate one, flagellum somewhat shorter than the peduncle. 

 Both pairs of gnathopoda much stronger than in M. Packardi, the anterior 

 ones with the propodos considerably expanded distally, palm denned below by 

 a distinct angle provided with the usual denticle, carpal lobe rather large 

 and broad, densely setous, and reaching about to the palm of the propodos. 

 Posterior gnathopoda with the propodos of considerable size, scarcely more 

 than twice as long as it is broad, and gradually expanded distally, palm about 

 the length of the hind margin, and distinctly defined below. Pereiopoda nearly 

 as in M. Paclmrdi. Telson oval triangular, outer part tapering to an obtusely 

 rounded point armed with 2 denticles. Colour in the living state of the 

 animal not yet stated. Length of female 8 mm. 



Remark*. Though very nearly allied to M. P<t<-krdi, this species, 

 established by Boeck, may be distinguished from it by the considerably longer 



