390 ARKIV FÖR ZOOLOGI. BAND 1. 



20, abdomen 32 mm.). This specimen was brought up from 

 a depth of about 500 meters in the Skager Räck. From the 

 bottom at this place there were dredged clay, mud and some 

 dead algse (Laminaria and Fucus). 



Euconaxius crassipes n. sp. 



While closely resembling Euconaxius coronatus, this spe- 

 cies differs from the latter by having the larger fore-foot, 

 and the claw especially, of great strength, (this leg being on 

 the right side in the only specimen which has yet been found) 

 (Pl. 20 fig. 11 and 12). 



Mdle. The claw or chela mentioned, is about as long as 

 the dorsal side of the carapace to the base of the rostrum 

 and is not compressed as is the case with Euconaxius coro- 

 natus') its thickness or largest section from the outer to the 

 inner side is about two-thirds of its greatest breadth (the 

 largest section from above to beneath). The digital portion 

 is about half as long as the basal part of the propodus. The 

 digitus is al so comparatively short, being only a little longer 

 than the said digital portion and strongly curved toward 

 the tip, and consequently, more resembling Euconaxius ar- 

 matus than coronatus. The prehensible edge is furnished 

 with a tooth or protuberance on its distal third, and a second 

 tooth, not quite as large, near the base. At the middle of 

 the same edge of the digital portion of the propodus there is 

 a strong tooth also, and on the inside of this are some smaller 

 teeth. Seen from the inner or outer side, the basal portion 

 of the propodus is a little broader at the distal end than at 

 the base. Except the central part of the inner side, the claw 

 is roughly granulated. The upper side of the propodus is 

 provided with comparatively strong, uneven spines directed 

 forwards. The same side of the digitus, like the under side of 

 the propodus, is roughly serrated. 



The carpus and the merus are very thick; the greatest 

 breadth of the former being quite as inuch as its length. 



The smaller chela of the iirst pair resembles that of 

 Euconaxius coronatus, but the saw-like teeth on the under 

 edge are stronger. 



There is one strong spine at the centre of the under side 

 of the merus of both the first chelipeds. 



