. cm. Text-fig. 59. Molgula sabulosa (Quoy and Gaimard): A, specimen with test removed; B, dorsal tubercle. Dorsal tubercle. The dorsal tubercle has a characteristic horizontal S-shaped slit (Text-fig. 59 B) as described by Herdman (1882) and Kott (1952). Branchial sac. In the branchial sac there are seven folds on each side, each fold with about six longitudinal bars. There are no bars between the folds. Gut. The oesophagus is short and the stomach has a group of short rounded caeca (). The primary intestinal loop is almost closed except at its anterior bend where the limbs are slight
. cm. Text-fig. 59. Molgula sabulosa (Quoy and Gaimard): A, specimen with test removed; B, dorsal tubercle. Dorsal tubercle. The dorsal tubercle has a characteristic horizontal S-shaped slit (Text-fig. 59 B) as described by Herdman (1882) and Kott (1952). Branchial sac. In the branchial sac there are seven folds on each side, each fold with about six longitudinal bars. There are no bars between the folds. Gut. The oesophagus is short and the stomach has a group of short rounded caeca (). The primary intestinal loop is almost closed except at its anterior bend where the limbs are slightly separated. The secondary loop is a flat horizontal semicircle or crescent, with the opening dorsal. Gonads. No gonads were found in this specimen. Renal sac. The renal sac is gently curved and is not very large. Remarks. Kott (1952, 1954) united M. sabulosa with M. pedunculata, but in spite of certain simi- larities the species are distinct, as shown in Table 37. Table 37 M. sabulosa M. pedunculata Test processes Present Present Tentacles 12 large and 12 small 12-20 Dorsal tubercle opening Horizontal S C-shaped, facing backwards; both horns inrolled Branchial sac 7 folds; 3-6 bars per fold; 0-1 bar 7 folds; 6-13 bars per fold; 1-4 bars between folds between folds Gonads Testis massed at lower, blind, end of ovary Testis along whole length of ovary Distribution S. Australia-Indonesia Antarctic 18
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