. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SCYPHOMEDUSAE 391. Fig. II. Desmonema chierchiana, Vanhoeffen. Sector of the bell with many canals in the lappets after injection with Delafield's haematoxylin. Many rows of thin tentacles (torn away). X i. and the ocular ones 20-25 mm. Both are about 55-60 mm. long. The lappet zone is here relatively narrow in comparison with the length of the radial pouches. The circular muscle bands of the latter are very well developed and separated by sixteen thin septa. There are many fine radial muscles i


. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SCYPHOMEDUSAE 391. Fig. II. Desmonema chierchiana, Vanhoeffen. Sector of the bell with many canals in the lappets after injection with Delafield's haematoxylin. Many rows of thin tentacles (torn away). X i. and the ocular ones 20-25 mm. Both are about 55-60 mm. long. The lappet zone is here relatively narrow in comparison with the length of the radial pouches. The circular muscle bands of the latter are very well developed and separated by sixteen thin septa. There are many fine radial muscles in the distal parts of the pouches, but none in the lappets. The oral arms are torn away. There is a short manubrium about 15 mm. in length; the subgenital ostia are oval in shape and ± 25 mm. wide, and the arm pillars 7 mm. broad. There are eight groups of tentacles arranged in 4-5 nearly straight rows adjacent to the outer edge of the circular muscles. All are torn away as if cut off at the base with a knife. The largest are in the innermost row; about 50-60 in all per group, and thread-like. There are 14-18 branches of radiating vessels in the tentacular lappets, the inner- most straight, running parallel, the lateral bent outwards. The branching is much simpler than in the specimen figured by Vanhoeffen (1908, Taf. ii, fig. 2) and restricted mainly to the distal parts of the canals. There are here many more canals, which are, however, much narrower than in D. gaiidichaudi (compare Fig. 10 with Fig. 11). The colour of the bell is light yellowish, the subumbrellar muscles pinkish yellow, the vessels in the lappets whitish, the gonads yellowish. This species is very common in the neighbourhood of the Falkland Islands. Family ULMARIDAE, Haeckel, 1877 Sub-family STHENONIDAE, L. Agassiz, 1862 Genus Phacellophora, Brandt, 1838 Phacellophora ornata (Verrill) (PlateXV, fig. 6; Fig. 12) St. 270. 27. vii. 27. 13° 58' 30" S, 11° 43' 30" E, Elephant Bay, Angola. Kelvin tube^


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