. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. SOUTH AFRICAN ASCIDIANS 105. Fig. 50. A. Microcosmus oligophyllus. B. Microcosmus psammophilus. C-D. Microcosmus squamiger. Most ventral folds do not reach the posterior of the branchial sac. The dorsal lamina has a wide imperforated band on the right side that is crossed by wide transverse vessels. On average there are seven longitudinal vessels in a mesh between the folds and 3-4 on the folds. They are sometimes intersected by parastigmatic vessels. The stigmata are short. The gut and the gonads ar
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. SOUTH AFRICAN ASCIDIANS 105. Fig. 50. A. Microcosmus oligophyllus. B. Microcosmus psammophilus. C-D. Microcosmus squamiger. Most ventral folds do not reach the posterior of the branchial sac. The dorsal lamina has a wide imperforated band on the right side that is crossed by wide transverse vessels. On average there are seven longitudinal vessels in a mesh between the folds and 3-4 on the folds. They are sometimes intersected by parastigmatic vessels. The stigmata are short. The gut and the gonads are wrapped in a loose tissue that obscures their outline. The stomach is wide and covered with two lobes of an hepatic gland (Fig. 50A). The one closest to the oesophagus is the largest, and it is also enclosed in the loose tissue. The hepatic lobes are wrinkled and lack protruding papillae. The intestine forms a loop in which the two limbs are closely apposed (Fig. 50A). The smooth anus is located at the oesophagus entrance. The gonads were not fully developed and consisted of poorly defined masses inside the body wall. The gonad on the right side is in an anterior position; the one on the left side does not cross the gut (Fig. 50A) as in other Microcosmus species, as there is no room for it. The sperm ducts are directed towards the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
