. Discovery reports. Discovery (Ship); Scientific expeditions. SYSTEMATIC ACCOUNT 231 which measures 3 mm. across the longer diameter, is surrounded by four long spines and leads into a funnel-shaped cavity. Two spines project obliquely upwards from the branch and are attached to its sides by a plate of coenoecial substance which spreads as a web between the spines and the side of the branch. Lower there is another small ostium which has two spines, one at each end of its long diameter. The spines are thick and blunt but are fewer than those of Form A. While fourteen spine-tips were counted in
. Discovery reports. Discovery (Ship); Scientific expeditions. SYSTEMATIC ACCOUNT 231 which measures 3 mm. across the longer diameter, is surrounded by four long spines and leads into a funnel-shaped cavity. Two spines project obliquely upwards from the branch and are attached to its sides by a plate of coenoecial substance which spreads as a web between the spines and the side of the branch. Lower there is another small ostium which has two spines, one at each end of its long diameter. The spines are thick and blunt but are fewer than those of Form A. While fourteen spine-tips were counted in an ordinary short branch of Form A, not more than eight or nine are found in Form B. They are only rarely forked. Many of the spines that are seen projecting freely from the surface of the coenoecium are embedded for a considerable proportion of their total length in the coenoecial wall. These embedded parts were at one time free spines, but were later covered by the growth of the coenoecium, and the support thus given was used as skeletal structure on which the tubes were lengthened. As the growing tubes thus closed round the basal parts of the spines, these con- tinued to elongate by the deposition of coenoecial material at their tips, so that they kept a constant length. The short branches are fewer than those of Form A. In one specimen, for a distance of 5 cm., there are only six short branches, and in another, for a distance of 6 cm., only eight short branches were counted. Besides the two distinct types of the species already described two speci- mens were obtained, one from station 167 and the other from station 187. Since both were dead colonies they cannot be definitely called new forms. Although the coenoecium shows a general structure greatly resembling that of C. hodgsoni, I do not venture to base my conclusion entirely on the structure of the coenoecium without examining the zooids. I shall therefore only describe the two pieces, and leave a definite identificatio
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
