Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 897
which are observablewhilst the ova are stillwithin the cloaca of theparent, presents some phe-nomena of much interestto the microscopist whichalone can be noticed here.After the ordinary repeatedsegmentation of the yolk,whereby a mulberry mass is produced, a sort of ringis seen encircling its… … Fig. 634.—Diagrammatic longitudinal section ofAscidiu show ing the heart, the blood-vessels,the branchial sac, the alimentary canal, &c.from the left side : br.si., branchial siphon;at.si., atrial siphon ; t., test; m,t mantle;br.s., branchial sac; p.br., peribronchialcavity; cl., cloaca ;…
Microscopy
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