. Text-fig. 21. Distaplia colligans Sluiter (St. MS 63): Zooid. Islands has zooids with only the ovary present and no testis. It is likely that Sluiter's two specimens were in the early male phase. The gonads are situated beside the loop of the intestine and scarcely project from the body except when at the height of their development. Only in some colonies from South Georgia and the South Orkney Islands is there any sign of a brood pouch; the zooids have a small sac-like projection from the dorsal body wall behind the atrial opening, evidently in the early stages of development. Remarks.
. Text-fig. 21. Distaplia colligans Sluiter (St. MS 63): Zooid. Islands has zooids with only the ovary present and no testis. It is likely that Sluiter's two specimens were in the early male phase. The gonads are situated beside the loop of the intestine and scarcely project from the body except when at the height of their development. Only in some colonies from South Georgia and the South Orkney Islands is there any sign of a brood pouch; the zooids have a small sac-like projection from the dorsal body wall behind the atrial opening, evidently in the early stages of development. Remarks. All these colonies, with the possible exception of the ones from St. 476 and St. 1113, are in good agreement with Sluiter's type specimens of D. colligans, although the new specimens differ slightly in having markings on the wall of the stomach, and in the larger size of the zooids. The single colonies from St. 476 and St. 1113 (PI. Ill, fig. 3) are larger (2 cm. in diameter and 7 cm. long respectively) and paler than those already described. The zooids also are much larger, reaching 8 mm. in length when fully expanded. In other respects, however, they are similar and I am inclined to think that the differences may be due to the stage of the annual cycle at which the colonies have arrived.
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
