. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. Fig. 34. Enchytrcetis metlakatlensis. elongated ovoid, with the apices sharply pointed. Nephridia with a small anteseptal consisting of nephrostome; the duct is strong, with a lumen much wider than that of the main body of the nephrid- ium ; the duct in the main body tightly and apparently irregularly folded. Color gray. Locality.— Metla- katla, Alaska, June 4, 1899. Found under sea-weeds, by Prof. W. E. Ritter. Characteristics.— The contracted sper- mathecsB are charac- teristic of this species. Another point of dis- tinctio
. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. Fig. 34. Enchytrcetis metlakatlensis. elongated ovoid, with the apices sharply pointed. Nephridia with a small anteseptal consisting of nephrostome; the duct is strong, with a lumen much wider than that of the main body of the nephrid- ium ; the duct in the main body tightly and apparently irregularly folded. Color gray. Locality.— Metla- katla, Alaska, June 4, 1899. Found under sea-weeds, by Prof. W. E. Ritter. Characteristics.— The contracted sper- mathecsB are charac- teristic of this species. Another point of dis- tinction between this species and Eizchytrccus alaskce is seen in the two penial papillas, which are of equal size and further apart than in the present species. Brain.— The structure of the brain offers some points of interest. The fibers, which in other genera form a solid convex band, are in this, as well as in E. alas- ^\\-sM, >^^, broken up into two groups, one forming a glob- ular projection extending further back toward the pos- terior margin (fig. 34, b'). It is not improbable that this peculiarity is of generic importance. Intestine. — There Is a thin coating of broad chlor- agogen cells in somites VI Fig. 35. EnchytrcBus metlakatlensis. ^O IX ; in the Other somites no such cells can be seen. Sperinathecce (fig. 36).—The pore connecting with the intestine is not at the apex of the pouch, but situated on one side, as shown in fig. 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 Harriman Alaska Expedition (1899); Washington Academy of Sciences (Washington, D. C. ); Harriman, Edward Henry, 1848-1909; Merriam, C. Hart (Clinton Hart), 1855-1942. New York, Doubleday, Page & company
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