. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. ASCIDIA MOREL ±( opaque white. The muscles are strongly developed and glisten amidst the spots of colour. The oral lamina (PL XIV, fig. 6) has the cleft in front short; it is widened a little at the mouth and terminates rather abruptly immediately below it. Above the mouth, on the left- side, there are three or four oblique plaits; there is no denticulation at the side. It is usually more or less coloured with brilliant carmine, particularly at the base and in the vicinity of the mouth; the sides are paler, the pale tint b
. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. ASCIDIA MOREL ±( opaque white. The muscles are strongly developed and glisten amidst the spots of colour. The oral lamina (PL XIV, fig. 6) has the cleft in front short; it is widened a little at the mouth and terminates rather abruptly immediately below it. Above the mouth, on the left- side, there are three or four oblique plaits; there is no denticulation at the side. It is usually more or less coloured with brilliant carmine, particularly at the base and in the vicinity of the mouth; the sides are paler, the pale tint being continued to the margin. The ten- tacular filaments are about forty in number; they are Position of oral Position of endostyle. FIG. 23.—Part of the branchial sac of Ascidia Morei, highly magnified. closely set, colourless, hyaline, and are dotted with opaque white. The branchial tubercle (PI. XIV, fig. 3) is well developed, angular at the sides, lozenge- shaped, and the convolutions are rather peculiar. The primary blood-vessels of the branchial sac are very regularly disposed and do not vary much in size. The secondary blood-channels are peculiar; they are exceedingly wide and irregular, the stomata being short, elliptical, and irregular in size. They rarely reach the whole width of the space between the primary vessels, and are not infrequently quite minute; the result is that the whole of the tissue has the appearance of a perforated membrane which is. 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 Alder, Joshua, 1792-1867; Hancock, Albany, 1806-1873; Hopkinson, John, 1844-1919; Norman, Alfred Merle, 1831-1918; Embleton, Dennis, 1810-1900. London, Printed for the Ray society
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Keywords: ., bookcentury1900, bookdecade1900, bookpubli, booksubjectseasquirts
