. The Cambridge natural history. Zoology. Fig. 50.—Calcareous spicules of the Tunicata, enlarged. A, From Cystodytes; B, from Leptodinum; C, from Culeolus ; D, from Rhabdocynthia. are four rows of stigmata. Colonies of Leptoclinum, forming thin white, grey, or yellow crusts under stones at low water, are amongst the commonest of British Compound Ascidians. Fam. 4. Diplosomatidae.—Test reduced in amount (Fig. 51), rarely containing spicules. Yas deferens not spirally coiled. In Fig. 51.—Section of a colony of Diplosoma (enlarged) to show the small amount of test present, hr, Branchial ap
. The Cambridge natural history. Zoology. Fig. 50.—Calcareous spicules of the Tunicata, enlarged. A, From Cystodytes; B, from Leptodinum; C, from Culeolus ; D, from Rhabdocynthia. are four rows of stigmata. Colonies of Leptoclinum, forming thin white, grey, or yellow crusts under stones at low water, are amongst the commonest of British Compound Ascidians. Fam. 4. Diplosomatidae.—Test reduced in amount (Fig. 51), rarely containing spicules. Yas deferens not spirally coiled. In Fig. 51.—Section of a colony of Diplosoma (enlarged) to show the small amount of test present, hr, Branchial aperture ; , common cloaca ; t, test. Diplosoma, Macdonald, and other allied genera (Fig. 51), the larva is gemmiparous (Fig. 42, F). Some species are common British forms, especially on Zostera-h&As, and amongst seaweeds. Fam. 5. Polyclinidae.—Ascidiozooids divided into three regions—thorax, abdomen, and post-abdomen (Fig. 46, C). Testes numerous; vas deferens not spirally coiled. The chief genera are—Pharyngodictyon, Herdman, with stigmata absent or modified, containing one species. Ph. miraUle (Fig. 44, C), 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
