. The Cambridge natural history. Zoology. 74 ASCIDIANS little or no food-yolk, and the tailed larvae (Figs. 26, 42, A) are of the typical form and structure descrihed in Chapter II. Fam. 3. Cynthiidae.—Solitary fixed Ascidians (Fig. 39), sometimes occurring in aggregations, but never forming colonies; usually with leathery or fibrous, opaque test, which is sometimes encrusted with sand; branchial and atrial apertures usually both four-lobed. Branchial sac longitudinally folded (Fig. 36, A); tentacles simple or compound (Fig. 37); stigmata straight. B. -end-. Please note that these imag
. The Cambridge natural history. Zoology. 74 ASCIDIANS little or no food-yolk, and the tailed larvae (Figs. 26, 42, A) are of the typical form and structure descrihed in Chapter II. Fam. 3. Cynthiidae.—Solitary fixed Ascidians (Fig. 39), sometimes occurring in aggregations, but never forming colonies; usually with leathery or fibrous, opaque test, which is sometimes encrusted with sand; branchial and atrial apertures usually both four-lobed. Branchial sac longitudinally folded (Fig. 36, A); tentacles simple or compound (Fig. 37); stigmata straight. B. -end-. 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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