314 



flagellum very slender. Anterior gnathopoda with the propodos rather narrow, 

 and oblong in form, nearly 3 times as long as it is broad, palm very oblique, 

 and about the length of the hind margin, carpal process somewhat flexuous 

 and extending far beyond the latter. Posterior gnathopoda somewhat more 

 elongated, with the propodos narrow linear, about 4 times as long as it is 

 broad, palm scarcely attaining half the length of the hind margin, carpal 

 process extending far beyond the tip of the propodos. Pereiopoda moderately 

 slender and densely setous, dactylus of the 2 anterior pairs narrowly acuminate, 

 that of the 2 succeeding pairs lanceolate compressed. Last pair of pereiopoda 

 very elongated and slender, basal joint oval quadrangular, carpal and propodal 

 joints nearly equal in length and each longer than the meral one, terminal 

 joint extremely slender. Last pair of uropoda with the rami about the length 

 of the basal part, very narrow and quite unarmed. Telson nearly twice as 

 long as it is broad, and scarcely tapering distally, tip evenly rounded. Colour 

 uniformly pale orange; ova in the marsupial pouch dark bluish. Length of 

 adult female scarcely exceeding 4 mm., that of male about the same. 



Remarks. As pointed out by the Rev. Mr. Norman, the Monoculodes 

 (ri'ulx't of Boeck is undoubtedly identical with the M.longimamts of Sp. Bate, 

 and, as the latter name is the older, it ought to be retained for the species. 

 In the living state, this animal is, at first sight, recognized from any of 

 the other (Ediceridse b} r the peculiar structure of the eyes, which indeed 

 exhibit a most beautiful aspect by their deep scarlet pigment and the 

 brillantly iridescent lenses contained in it. Very soon, however, after being 

 immerged in spirit, the lenses wholly disappear, and even the pigment is only 

 for a short time visible, being also at last dissolved by the action of the 

 spirit. The structure of the gnathopoda will, however, still serve for readily 

 recognizing the species. 



Occurrence. I have met with this form in several places, both off the 

 south and west coasts of Norway, as also in the Trondhjemsfjord, and in 

 every case in rather shallow water, especially where the bottom consists of 

 fine sand. It extends northwards to Host, the outermost of the Lofoten Isles, 

 and is also occasionally found off the Finmark coast, thus at Hasvig. 



Distribution. British Isles (Sp. Bate), Kattegat (Meinert), coast of 

 France (Chevreux), Mediterranean at Spezia (the author). 



