Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . hydrotheca. The two rows of hydrothecae and hydro-cladia in one plane. Hydrocladium separated from stem apophysis by a distinct node, narrowerthan stem. Nodes scarce, oblique, not well marked, sometimes not visiblefor the entire length. Hydrothecae closely set, more so in the distal region wherethe margin of one overlaps the base of the next, most hydrothecae with afenestra immediately below the base on one side. Hydrotheca tubular, curved outwards, adnate for about two-thirdsadcauline height. Gonothecae borne on hydr
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . hydrotheca. The two rows of hydrothecae and hydro-cladia in one plane. Hydrocladium separated from stem apophysis by a distinct node, narrowerthan stem. Nodes scarce, oblique, not well marked, sometimes not visiblefor the entire length. Hydrothecae closely set, more so in the distal region wherethe margin of one overlaps the base of the next, most hydrothecae with afenestra immediately below the base on one side. Hydrotheca tubular, curved outwards, adnate for about two-thirdsadcauline height. Gonothecae borne on hydrocladia below hydrothecae, long and carrot-shaped, widest at distal end, strongly annulated with 15-17 circular crests (notspiral), with terminal aperture on a raised collar. Measurements (mm) Hydrotheca, length abcauline 0,40-0,47 length adcauline, adnate part 0,38-0,60 length adcauline, free part 0,23-0,31 adnate part/total adcauline length 0,57-0,70 diameter at margin 0,31-0,33 Gonotheca, length 2,35-3,10 maximum diameter 0,86-1,24 36 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 10. Symplectoscyphus subarticulatus (Coughtrey). A-B. Hydrothecae. C. Distal part of stemshowing origins of hydrocladia. D. Gonotheca. Symplectoscyphus biformis (Jaderholm). E. A single hydrotheca. F. A group of three hydro-thecae. Drawn from the holotype. Scale in mm/10. HYDROEDS FROM THE KERGUELEN AND CROZET SHELVES 37 Remarks The hydrothecae of this material are larger than those of Ralph but smallerthan those of Blanco. The details of structure and the method of branchingagree exactly with those described by Ralph. The only hesitation in the identi-fication lies in the gonotheca, which is about twice the length of that describedby Ralph and has more annulations (15-17 as against 5-8). However, theshape of the gonotheca is exactly like that depicted by Coughtrey (he does notgive the size, but the diagram shows 10 annulations). S. subarticulatus is best known from New Zealand, but recent reportsshow th
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
