. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. 50 BRITISH TUNIC ATA. thin and transparent, free or attached only at the tubes. Alimentary canal largely developed, forming two loops, both of which extend the entire width of the body ; the liver of a pale green colour. Eepi-o- Jnrfirr or<jn n of the right side fusiform, lying upon the rectum within the lower loop. Longest 'ter three-eighths of an inch. Hab.—? SCOTLAND.—Hebrides. First record.—Alder & Hancock. We have seen only a single individual of this well- marked species (figs. 38 and 39), and unfortuna
. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. 50 BRITISH TUNIC ATA. thin and transparent, free or attached only at the tubes. Alimentary canal largely developed, forming two loops, both of which extend the entire width of the body ; the liver of a pale green colour. Eepi-o- Jnrfirr or<jn n of the right side fusiform, lying upon the rectum within the lower loop. Longest 'ter three-eighths of an inch. Hab.—? SCOTLAND.—Hebrides. First record.—Alder & Hancock. We have seen only a single individual of this well- marked species (figs. 38 and 39), and unfortunately the internal parts were much injured, so that many of the. FIG. 38. FIG. 39. FIGS. 38 AND 39.—Test of Molgula valvata. 38, side view: 39, as seen from above. Three and a half times natural size. characters could not be determined. The external features, however, are sufficiently distinct, though they resemble to some extent those of M. oculata, to which the present species is undoubtedly closely allied. It is distinguished, nevertheless, from that species by the membranous valvular expansions within which the tubes are placed. In M. oculata the margins of the tubular area are not produced, while in M. valvata they form two distinct membranous folds of consider- able width which extend from near the ventral margin to about two-thirds across the body; these folds are approximated between the tubes and are separated a little in their immediate vicinity, so that here as well as in M. oculata the perforated tubes simulate a pair of. 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
