. The Cambridge natural history. Zoology. B. -end-. FlG. 36.—Diagrammatic transverse sections of branchial sacs of Cynthiidae. A, Cynthia ; B, Styela ; C, Styelopsis; D, Pelonaia. 1-7, First to seventh branchial fold ; , dorsal lamina ; end, endostyle ; mh, meshes. neural gland dorsal to ganglion; gonads attached to body-wall. This family is divided into three sections:— Sub-Fam. 1. Styelinae.—Not more than four folds (Fig. 36, B) on each side of branchial sac; tentacles simple (Fig. 37, A). The more important genera are—Styela, Macleay, and Polycarpa, Heller (Fig. 3 9), with s
. The Cambridge natural history. Zoology. B. -end-. FlG. 36.—Diagrammatic transverse sections of branchial sacs of Cynthiidae. A, Cynthia ; B, Styela ; C, Styelopsis; D, Pelonaia. 1-7, First to seventh branchial fold ; , dorsal lamina ; end, endostyle ; mh, meshes. neural gland dorsal to ganglion; gonads attached to body-wall. This family is divided into three sections:— Sub-Fam. 1. Styelinae.—Not more than four folds (Fig. 36, B) on each side of branchial sac; tentacles simple (Fig. 37, A). The more important genera are—Styela, Macleay, and Polycarpa, Heller (Fig. 3 9), with stigmata normal; and Bathyoncus, Herd- man, with stigmata absent or modified. There are a very large number of species of both Styela and Polycarpa from all parts of the world, including our own seas. A very abundant British littoral form has been placed in an allied genus under the name Styelo'psis grossidaria (Fig. 39, A). It is known in some places round our coasts as " the red-currant ; This^ species has only one well-marked fold in the branchial sac (Fig. 36, C). Another exceptional British Styelid is Pelonaia corrugata, Forb. and Goods. (Fig. 39, I), with no branchial folds (Fig. 36, D).. 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
