. Fig. 29. Ophelia bipartita. a. Anterior region of body seen from side. b. Anal cylinder seen from behind. The anus (Fig. 29 b) has a pair of stout anal papillae, which are continuations of the lateral ridges, and above these 16 slender papillae. Inside the rectum is a papillated valve. There is a lateral organ in the form of an oval pore between notopod and neuropod in every chaetiger, and nephridial pores are present from the 12th to the i6th chaetigers. This species then has a very clearly separated anterior region of eight chaetigers, the first nine and the last five chaetigers abranchiat
. Fig. 29. Ophelia bipartita. a. Anterior region of body seen from side. b. Anal cylinder seen from behind. The anus (Fig. 29 b) has a pair of stout anal papillae, which are continuations of the lateral ridges, and above these 16 slender papillae. Inside the rectum is a papillated valve. There is a lateral organ in the form of an oval pore between notopod and neuropod in every chaetiger, and nephridial pores are present from the 12th to the i6th chaetigers. This species then has a very clearly separated anterior region of eight chaetigers, the first nine and the last five chaetigers abranchiate and an intermediate branchiate region of 17 chaetigers. Remarks. This species is very close both to the European , Schneider, and to the South Australian O. damievigi, Benham. O. Jieglecta has 32 chaetigers and 18 pairs of branchiae. Moreover, the ventral groove begins at the loth chaetiger and not
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
