12 



P. L. KRAMP. 



[REP. OF THE "MICHAEL SARS" NORTH 



of the canals is very regular; there are 4 groups, each from stat. 101, taken with 200 m. wire (textfig. 5), the 



consisting of 3 canals, almost equidistant when leaving four groups contain 4—3—3—3 canals, fairly equidistant 



the stomach. — In the other specimen from stat. 97 (text- when leaving the stomach, but the distances between 



fig. 3) the arrangement is very irregular. It is possible their distal ends are very different, the number of ten- 



Fig. 3. 



to distinguish four groups of grooves, but they do not 

 issue from exactly the same point. The first group con- 

 tains 4, the second 3 canals. In the third group there 

 is only one canal at the periphery of the stomach, but 

 just outside the stomach it divides into two canals. The 



Fig. 4. 



fourth group contains 2 canals one of which is bifurcated 

 halfway to the margin of the bell. Thus altogether 12 

 canals reach the ring-canal. Near the base of the gastral 

 groove corresponding to the last-mentioned canal the 

 groove sends out a short branch, which is undoubtedly 

 the first origin of a developing new radial canal. — In the 

 specimen from stat. 98 (textfig. 4) there are four groups 

 with 4 — 3 — 3—3, altogether 13 canals, leaving the sto- 

 mach in a somewhat irregular manner. — In the specimen 



Fig. 5. 



tacles between two successive radial canals varying from 

 15 to 24. — The canal system of the specimen from stat. 

 101 b, taken with 1000 m. wire (textfig. 6) is somewhat 

 irregular. The stomach is very wry, and the four groups 

 of grooves do not issue 'from the same point. The groups 

 contain 3—3 — 2 — 3, altogether 11 canals. Two of the 

 canals are connected by a short anastomosis just outside 

 the stomach. The number of tentacles between two suc- 

 cessive radial canals varies from 10 to 25. 



Geographical Distribution. — All the specimens 

 obtained by the "Michael Sars" were captured in July 

 and August 1910 west of the British Isles. The species 



Fig. 6. 



is not uncommon in the North Atlantic from Scotland 

 to Iceland, though it has never been recorded from that 

 area. 1 ) — Previously known from the Atlantic coast of 



J ) GOnther : (Report on the Coelenterata ... of the North 

 Atlantic— Ann. Mag. Nat. Hist., ser. 7, vol. XI, 1903, p. 420) mentions 

 two small medusae which "bear a considerable resemblance to the 

 young of Halopsis oceltata as described by Agassiz", but from his 

 description it docs not seem probable that the specimens have belonged 

 to that species. 



