. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 16 ANNALS OF THE SOUTH AFRICAN MUSEUM and increase in length towards the outer edges of the radula. Only the outermost teeth decrease in length. Central nervous system (Fig. 15) The major ganglia are situated in the circumoesophageal nerve ring. The cerebral and pleural ganglia are largely distinct. The anteriormost nerve of the dorsal surface of the cerebral ganglia bifurcates near its base with the inner branch innervating the inter-rhinophoral crest and the outer branch innervating the rhinophores
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 16 ANNALS OF THE SOUTH AFRICAN MUSEUM and increase in length towards the outer edges of the radula. Only the outermost teeth decrease in length. Central nervous system (Fig. 15) The major ganglia are situated in the circumoesophageal nerve ring. The cerebral and pleural ganglia are largely distinct. The anteriormost nerve of the dorsal surface of the cerebral ganglia bifurcates near its base with the inner branch innervating the inter-rhinophoral crest and the outer branch innervating the rhinophores. There is a distinct rhinophoral ganglion near the apex of the rhinophoral nerve. The eyes are situated at the apex of short optic nerves which join the central nervous system via small optic ganglia at the junction of the cerebral and pleural ganglia. Extending from the cerebral ganglia are the buccal nerves which join the round buccal ganglia. Anterior to each buccal ganglion is a minute gastro-oesophageal ganglion. The pedal ganglia are long with an elongate commissure between them. Reproductive system (Fig. 16) The follicles of the ovotestis are numerous and arranged into distinct lobes. The thick ampulla has 2 or 3 convolutions and narrows to the bifurcation of the vas deferens and oviduct. The glandular prostatic vas deferens is short with few convolutions. It enlarges into a much thicker penis sac which is recurved to an acutely pointed unarmed penial papilla. The muscular oviduct is embedded. Fig. 15. Janolus longidentatus sp. nov. Central nervous system. Scale 1,0 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
