. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 307 surface of the organ of fixation in Page's specimens in reality was the proximal part of the root system with its intricate trabecular mass of cuticular matter, bringing about a pronouncedly uneven surface of this part of the parasite. The six specimens of Pasiphaea tarda Kroyer from the Skagerrak infested with Amallocystis capdloms Fage were all of the male sex. Curiously enough the two specimens of Pasiphaea acutifrons Bate from the Strait of Magellan bearing the same parasit
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 307 surface of the organ of fixation in Page's specimens in reality was the proximal part of the root system with its intricate trabecular mass of cuticular matter, bringing about a pronouncedly uneven surface of this part of the parasite. The six specimens of Pasiphaea tarda Kroyer from the Skagerrak infested with Amallocystis capdloms Fage were all of the male sex. Curiously enough the two specimens of Pasiphaea acutifrons Bate from the Strait of Magellan bearing the same parasite are both females. They do not show any mdication of differences from normal females, as might be expected as a result of the parasitization. As, however, no material of uninfested specimens of this rare species was available, it is not altogether certam that m every respect they are of normal Fig. x6. Amallocystis capUlosus Fage, specimen of Figs. «. detail of fig. 13, further enlarged Mieve plate of section between those of Figs. 13 and 14. /, organ of fixation;/.., proximal root system; ., sieve plate, x 190. THE CHARACTERS OF THE SPECIES OF THE GENUS AMALLOCYSTIS A synopsis of the characters of the described forms of the genus Amallocystis, based on data from the literature and on those of the present paper, shows the foUowmg particulars. (i) The parasite mentioned and figured by Bate (1888) Hostandmannerofattachment:P««>^a Bate, ventral surfaceofsecondabdommalsegnient. Number and arrangement of trophomeres: Approximately fifty (?), in a bundle spreadmg from a common centre. , ,. , • 1 • 1 * • Shape of trophomeres and gonomeres: Trophomeres elongately cyhndncal or conical, twice or 2| times as long as broad; gonomeres globular to oval. Number of gonomeres on each trophomere: Three. Dimension of gonomeres: Unknown. Organ of fixation: Unknown. (2) Amallocystis racemosus (Coutiere) Host and manner of attachment: Pasiphaea tarda Kroyer, ven
Size: 2127px × 1175px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
