. Bulletin - United States National Museum. Science. vol, 2, pt. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 73 ventral division runs backward and a little ventralward, to the posterior edge of the third body muscle (fig. 49). In the lower lip there is a verv short uncon- , _. J i^I+ nected band (I. 1) at the edge of the lip (fig. 51), not before described, and a second, broad, sphincter (Z. 2) not split as in the embryo Streifl7 figures (fig. 50), and continuous with*the dorsal retractor. There is a third sphincter, not so broad as the last, continuous dorsally with the first sphinct
. Bulletin - United States National Museum. Science. vol, 2, pt. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 73 ventral division runs backward and a little ventralward, to the posterior edge of the third body muscle (fig. 49). In the lower lip there is a verv short uncon- , _. J i^I+ nected band (I. 1) at the edge of the lip (fig. 51), not before described, and a second, broad, sphincter (Z. 2) not split as in the embryo Streifl7 figures (fig. 50), and continuous with*the dorsal retractor. There is a third sphincter, not so broad as the last, continuous dorsally with the first sphincter of the upper lip. Thedorsalretractor shows broad fibers on its edges, as does the main trunk of the ventral retractor. The two elongated posterior divisions of the retractor, on the other hand, do not show their mar- ginal fibers broader than their central ones. The fourth sphincter of the lower lip is broad. Posteriorly it is continuous with the ven-. —Apsteikia punctata, embryo, oral muscula- ture, VIEWED FROM THE RIGHT SIDE. FROM STREIFF (1908), MY 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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