. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. and oblique nodes; above a transverse joint there is an internodiuin bearing one or two unpaired sarcothecae in the median line, then the highly oblique joint, and an internodiuin furnished with a proximal, unpaired median sarcotheca, a large hydrotheca, and two supraealyeine pairs of sarco- thecae. Of the supraealyeine pairs of nematothecae, the outermost is placed on small projecting apo- physes, the inner pair arises from the internodiuin on the inner side of these sarcotheca apophyses. All the sarcothecae are mobile. The
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. and oblique nodes; above a transverse joint there is an internodiuin bearing one or two unpaired sarcothecae in the median line, then the highly oblique joint, and an internodiuin furnished with a proximal, unpaired median sarcotheca, a large hydrotheca, and two supraealyeine pairs of sarco- thecae. Of the supraealyeine pairs of nematothecae, the outermost is placed on small projecting apo- physes, the inner pair arises from the internodiuin on the inner side of these sarcotheca apophyses. All the sarcothecae are mobile. The hydrotheca is very slightly fused with the interuodium, the adcladial side has a free portion, in length equal to the hydrotheca opening or a little less, between r/2 and 3/4 the length of the hydrotheca. The hydrotheca is somewhat expanded towards the opening, and is able to accomodate the contracted polyp almost entirely. The gonotheeae arise from the stem or the hydrocladia close beneath the hydrotheca;. The gonotheca is oval to pear- shaped, as a rule somewhat curved, the males a little more slender than the females. The female gonothecae have basally two sarcothecae, which, (according to Hi neks) are lacking in the males. , Material: The Faroe Islands: 6 miles N. by W. of Store Kalso depth 60 fathoms Deep hole at the north point of Nolso, — 100 — Boronaes 13 miles in N. 75 W. — 30 a Fig. XXV. Plumularia Catharina The inner pair of supraealyeine sarcothecae in Plumu- from 6 miles N. by w. of store Kalso. ,„„, , , , a. hydrothecate internode seen from larta Catharina (fig. XXV) appears to have escaped the atten- behind _ b two successive inter_ tion of most investigators; it is probably this pair of sarcothecae nodes in side view. - / inner pair of supraealyeine sarcothecse. (X 80). which has eiven rise to the distal median sarcotheca so often ascribed to the species. Such median (unpaired) distal sarcothecae I have been unable to find in the colonies at my dispos
Size: 1376px × 1816px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectscientificexpedition
