. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. a 735 mm 4^^""^^^.. Fig. 8. Helicolenus dactylopterus a. Larva, b. Early juvenile showing completed major ossification. Measurements indicate standard length. second primary spine lengthens considerably to become as long as the third and eventually the longest spine, as in the adult condition. A small spine develops behind the supraorbital, also behind the supra temporal. Rows of villiform teeth develop on the upper and lower jaws in the late larval stage. In the trunk and tail ossification
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. a 735 mm 4^^""^^^.. Fig. 8. Helicolenus dactylopterus a. Larva, b. Early juvenile showing completed major ossification. Measurements indicate standard length. second primary spine lengthens considerably to become as long as the third and eventually the longest spine, as in the adult condition. A small spine develops behind the supraorbital, also behind the supra temporal. Rows of villiform teeth develop on the upper and lower jaws in the late larval stage. In the trunk and tail ossification of the neural spines commences between 5,0 and 5,4 mm while that of the centra starts between 5,5 and 6,0 mm and that of the haemal spines soon after. Ossification proceeds anteroposteriorly in sequence. At 5,4 mm there are two neural spines and at 6,0 mm 5 to Between 6,0 and 6,6 mm ossification proceeds rapidly and 17 to 20 neural spines and 14 to 16 haemal spines are formed, as well as 15 to 20 complete and 2 to 3 incomplete centra (see Table 6). Twenty vertebrae are fully ossified at 7,35 mm (Fig. gd) and by 8,5 mm 24 centra, with a full complement of 18 to 19 haemal and 23 neural spines ossified by standard length 9,5 mm. Between 10,0 mm and the juvenile stage the neural arches ossify completely and the spines become broader and stouter. At 4,8 mm there are four ossified caudal rays, five or six at 6,0 mm. The notocord becomes heterocercal at 6,6 mm. The full complement of 15 primary caudal rays is ossified by 7,35 mm as well as five to six secondary rays. 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
