204 CRUSTACEA MALACOSTRACA. III. 



each with about 9 ocelli. -- Antennulse very thick and characteristic; in the large specimen (fig. n a) 

 they are nearly horizontal with the third joint bearing the two rami turned somewhat backwards 

 along the terminal margin of second joint, while in the small specimen the antennulae (fig. nb, in 

 which the major part of first joint is omitted) are directed outwards and somewhat downwards, and 

 their third joint outwards and somewhat forwards, so that it is easily discernible from the second 

 joint The figures show a very characteristic armature with regularly arranged, triangular processes 

 on the distal, posterior part of first joint, while second joint has low tubercles or blunt processes on 

 the lower surface and two somewhat short, acute processes and one rather long, acute process at the 

 hind margin; third joint without processes, its first ram us short, and each of both rami with three 

 long terminal setae, while six sensory setae originate partly from the long ramus and partly from the 

 joint (the number and length of these setae could not be made out in the large specimen). The 

 antennae reach slightly beyond the hind margin of third thoracic segment, and are built as in other 

 larvae of the Bopyridae, with four joints in the peduncle and four in the flagellum ; third peduncular 

 joint with the lower terminal margin divided by narrow incisions into some teeth. - The broadly 

 conical proboscis terminates in a moderately small, subcircular, funnel-shaped sucking-disk, which 

 seems to be more thin-skinned than in the Dajidse, and has the lower surface glabrous; the end of 

 the mandibles as usual seen in the central hole. 



Thoracic epimera triangularly produced backwards, without serration. All seven pairs of thoracic 

 legs subsimilar, with the hand ovate. Pleopods (fig. n c) with both rami well developed; the outer 

 ramus longer and much narrower than the inner. Sixth abdominal segment seen from above (fig. nd) 

 triangular; the portion along the whole posterior margin produced into a thin plate which is broadest 

 at the median line, and the median half is divided by narrow incisions into four pairs of comb-teeth 

 and rudiments of a fifth pair; the median pair of teeth are a little stronger than the others; below 

 and behind this pair a very long, acute process projects backwards, but its major part is covered by 

 the segment. Uropods nearly as in Phryxus, with the endopod about half as long as, and much 

 narrower than, the exopod. 



Occurrence. Taken by the "Ingolf" at two stations. 



Davis Strait: Stat33: Lat. 67 "57' N., Long. 553o' W., 35 fath., temp. 0-8; on i spec, of Spir. 



polaris, 



North of Iceland: Stat. 127: Lat 6633' N., Long. 2OO5' W., 44 fath., temp. 5-6; on 2 spec, of S. 



spinus. 



It has been collected at numerous places at both sides of Greenland in depths from a few 

 down to 175 fath. According to my Malac. Groenl., Stephensen's Conspectus, and a good number of 

 specimens not recorded but secured by various collectors since 1887, it has west of Greenland been 

 taken so far north as in Lat 8i44' N. at Griunell Land, and at Port Foulke, Lat 78! 7' N., and off 

 the west coast of Greenland at about fifteen places between Lat. 73 and Lat 6o43' N. ; it was always 

 found on ,Spirontocaris polaris and S. spinus, but from Kroyer's time our Museum possesses a couple 

 of females taken, according to the label, at Julianehaab on 5. Fabricii; when Stephensen stated it to 

 have been taken by the "Tjalfe" on S. macilenta, the name of the host is a misscript for S. spinus. 

 New localities not found in Stephensen's Conspectus are: Egedesminde, Akugdlek, Fiskenaes and 



