Notes on the Medusa Amphinema Krampi Russell

Extract

In a recent paper (Russell, 1956) I described a new medusa Amphinema krampi from a single specimen. I have now found three more specimens in collections made with a 2 m stramin ring trawl by R.V.Sarsia. Two of these were caught on 13 June 1956 at 48° 29' N., 9° 05' W. with 450 fathoms of wire out; one was a female 7 mm high and the other a male about 5 or 6 mm in height. The third specimen, a male 6·5 mm high, was taken on 4 July 1956 at 47' N., 5° 47' W. with 880 fathoms of wire out. Of the three specimens the female being the best preserved was kept intact; the two males were used for sectioning.

It is now possible to add to my previous description of the species. As in the specimen already described, the umbrellas are crumpled and have their margins turned inwards. In the female, however, it is certain that there is a small apical projection. The radial canals leave the stomach below the lower limits of the gonads so that there are fairly long 'mesenteries'. The marginal tentaculae are six in number in each specimen, two perradial and four interradial. It is possible therefore that the eight which I recorded in my first specimen may have been an abtext-abstract number. The interradial female gonads are irregularly folded and much corrugated. All specimens have exactly the same coloration as that given in my previous description. A drawing of the female medusa is given in Fig.