54 



twice the length of the superior, flagellum composed of 23 24 joints. Anterior 

 gnathopoda very slender, propodos about the length of the carpus, slightly 

 constricted on the middle. Posterior gnathopoda likewise very slender, pro- 

 podos much shorter than the carpus. Basal joint of 3rd pair of pereiopoda 

 very much dilated and broader than that of the 2 succeeding pairs. Last 

 pair of uropoda with the inner ramus fully as long as the outer and acumi- 

 nated at the tip. Telson very elongated and narrow, nearly three times 

 as long as it is broad, cleft beyond the middle; terminal lobes very narrow 

 and armed each with an apical and a dorsal denticle. Colour yellowish, with 

 numerous orange-coloured pigmentary spots, causing the back to assume a 

 more or less reddish orange hue. Length of adult female 9 : /2 mm. 



Remarks. This is the species on which Sp. Bate founded his genus 

 Scopelocheirus. It is easily known from most other Lysianassidse by its 

 thickish glabrous body densely speckled with orange-coloured pigmentary 

 spots, and by the very conspicuous dorsal incision on the 1st segment of the 

 urosome. 



Occurrence. I have met with this form in several places both on 

 the south and west coasts of Norway at depths varying from 20 to 100 fathoms. 

 Quite recently I collected it rather plentifully in the Trondhj emsfj ord from 

 dead fishes fastened on the fishermen's lines. 



Distribution. British Isles, Shetland. 



14. Callisoma Kroyeri, (Bruzelius). 



(PI. 19, fig. 2). 

 Anonyx Kroyeri, Bruzelius, Skand. Amphip. Gammar. p. 45, PI. II, fig. 7. 



Very like the preceding species, but of smaller size and having the 

 coxal plates less deep. Cephalon relatively somewhat larger, with the lateral 

 corners scarcely projecting. Last pair of epimeral plates of metasome rounded 

 at the lateral corners, posterior edge smooth. First segment of urosome 

 provided dorsally with a similar, though not quite so deep, incision as in 

 C. crenata. Eyes broadly oval, dark brownish. Antennae very like those 

 organs in C. crenata, but with a less number of articulations on the flagella. 

 Buccal mass distinctly projecting beneath the anterior coxal plates. Gnatho- 

 poda comparatively less slender, propodos of the anterior ones much longer 

 than the carpus and of uniform breadth throughout. Basal joint of the 3 

 posterior pairs of pereiopoda less dilated than in C. crenata. Last pair Of 

 uropoda with the inner ramus a little shorter than the outer, but scarcely 

 narrower. Telson shorter than in C. crenata f about twice as long as broad, 



