. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. ENCHYTR^ID^ SI Locality. — Hoods Peak, Sonoma Co., California, April, 1893, in soil near a creek. Collected by Miss Alice Eastwood. Of some twenty specimens only a few are Fig. 25. MesencJiytrcBus east-xoodi. In size this species resembles M. fontinalis. From this species M. eastwoodi is well distinguished by its atrial glands, its small lym- phocytes, and the arrangement of its setae, which gradually diminish in size toward the lateral interval. MESENCHYTR^US NANUS sp. nov. Text-fig. 26. Definition.— Length 8 mm., wi
. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. ENCHYTR^ID^ SI Locality. — Hoods Peak, Sonoma Co., California, April, 1893, in soil near a creek. Collected by Miss Alice Eastwood. Of some twenty specimens only a few are Fig. 25. MesencJiytrcBus east-xoodi. In size this species resembles M. fontinalis. From this species M. eastwoodi is well distinguished by its atrial glands, its small lym- phocytes, and the arrangement of its setae, which gradually diminish in size toward the lateral interval. MESENCHYTR^US NANUS sp. nov. Text-fig. 26. Definition.— Length 8 mm., width .6 mm. Somites 56, well de- fined. Setae : laterals, uniformly 2, 2, etc., i ; ventrals, 3, 4, 4, 5, 5, 5, 5, 4, 4, 4, o, 2, 3, 2, etc. Head-pore near apex. Sexual papillae distinct. Septal glands IV to VII. Brain almost square, posteriorly deeply emarginated. Dorsal vessel rises in XVI. Intes- tine covered with thick chloragogen cells. SpermathecEe large, con- fined to one somite, with a large central chamber representing two primitive, opposite, diverticles ; apex of spermathecal ampulla appears to be connected with the intestine by a pore. No sperm-ducts ; the sperm-funnels (fig. 26, d^ club-shaped, open directly in the penial pore without any intermediary ducts. There is no penial bulb, and no glands of any kind in connection with the efferent apparatus. Testes and ovaries normal. A single ovisac and two sperm-sacs extending backward through several somites. Nephridia with very long duct and many-lobed central part. Lymphocytes small, ovoid, not 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 &
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