. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 132 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 12. Catriona Columbiana (O'Donoghue, 1922). Scanning electron micrograph of the radula. Scale: 10 urn between squares. Etymology The word "casha1 is derived from Zulu, meaning to hide or conceal oneself and refers to the manner in which the cerata are carried horizontally, conceal- ing the body. External morphology The live animals varied from 2 to 11 mm in length (Fig. IE). They are small, somewhat stout with a broad anteriorly rounded foot. The rhin
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 132 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 12. Catriona Columbiana (O'Donoghue, 1922). Scanning electron micrograph of the radula. Scale: 10 urn between squares. Etymology The word "casha1 is derived from Zulu, meaning to hide or conceal oneself and refers to the manner in which the cerata are carried horizontally, conceal- ing the body. External morphology The live animals varied from 2 to 11 mm in length (Fig. IE). They are small, somewhat stout with a broad anteriorly rounded foot. The rhinophores are smooth, stout and longer than the oral tentacles. A pair of eye spots is visible at the base of the rhinophores. The cerata are distributed in distinct transverse rows, 4 on each side of the anterior digestive group and 7 pairs of posterior rows (Fig. 13A). The cerata are fairly large and thick and droop on the ground as the animal crawls. When disturbed, the cerata bristle. The gonopores are below the second right ceratal row and the acleioproctic anus lies in front of the fifth ceratal row (Fig. 13A). The body is translucent white with white internal organs visible through the body wall (Fig. IE). The rhinophores and tentacles are also translucent white. The cerata contain a branch of the orange to orange-brown digestive gland and each bears a band of dense opaque white epidermal pigment at the distal end. Juvenile specimens show the same coloration pattern as 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
