Natural history . ort, andthe stone canal {st. c.) opens into a closed vesicle {ax.). Fig. C.—A somewhat lateral longitudinal section through an older specimen than that represented inFig. .5. Magnification 75 diameters. The axial sinus is seen to communicate with the ca;lom bya canal (mad.). Fig. 7.—A median longitudinal section tln-ough a specimen about the same age as that represented inFig. G. Magnification 75 diameters. puL, a diverticulum of the thin-walled rectum, which is in allprobability the rudiment of the pulmonary trees. Fig. 8, a., b., and c.—Three transverse sections through one
Natural history . ort, andthe stone canal {st. c.) opens into a closed vesicle {ax.). Fig. C.—A somewhat lateral longitudinal section through an older specimen than that represented inFig. .5. Magnification 75 diameters. The axial sinus is seen to communicate with the ca;lom bya canal (mad.). Fig. 7.—A median longitudinal section tln-ough a specimen about the same age as that represented inFig. G. Magnification 75 diameters. puL, a diverticulum of the thin-walled rectum, which is in allprobability the rudiment of the pulmonary trees. Fig. 8, a., b., and c.—Three transverse sections through one of the younger specimens. Magnification75 diameters. 8a. is through the tentacles ; Sb. through the middle region of the body, and8c. through the posterior end ; y. ? curiously deeply-staining packets of cells resembling rudimentarygonads. The restriction of the tube-feet to the three ventral interradii is seen, as also the fact thatthe most terminal tube-feet belong to the mid-ventral radius. Orid rt£ 33
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, booksubjectzo
