. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 24 EISEN Nephridla (fig. 3, ^). —A larger and especially a broader nepliro- stome than any other species examined by me. Nephridia of the somites anterior to clitellum much larger than those in the posterior somites. But the ducts leading to the pores of these anterior nephridia are much shorter than the ducts of the posterior nephridia. In the latter the duct is twice or three times as long as in the anterior ones. MESENCHYTR^US HARRIMANI sp. nov. pi. I, figs. 1-6; pi. II, figs. 1-7; and text-figs. 4-6. Dcjinition. — Length
. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. 24 EISEN Nephridla (fig. 3, ^). —A larger and especially a broader nepliro- stome than any other species examined by me. Nephridia of the somites anterior to clitellum much larger than those in the posterior somites. But the ducts leading to the pores of these anterior nephridia are much shorter than the ducts of the posterior nephridia. In the latter the duct is twice or three times as long as in the anterior ones. MESENCHYTR^US HARRIMANI sp. nov. pi. I, figs. 1-6; pi. II, figs. 1-7; and text-figs. 4-6. Dcjinition. — Length 60 mm. or more; width mm. or over. Somites about 100, deeply set. The few anterior somites strongly pigmented on dorsal side; the somites following less and less pig- mented, the jDosterior ones not at all. Setag strongly cur\xd; laterals, 3, 3, 2, 3, 3' 3' 3i 3' 3' 2 (XI), o (XII), 3, 4, 3^ 3^4»3^ 35 ventrals, 5, 5, 5, 6, 5, 6, 6, 6, 6, 5 (XI), o (XII), 6, 7, 6, 6, 7, 7, 6, etc. Cli- tellum XI, XII, and \ XIII. Sexual papilliE not project- ing. Septal glands in IV to VI. Brain square, an- teriorly strongly emargi- nated, posteriorly almost straight and slightly emar- ginated. Spermathecae un- usually elongated, with two strong diverticles near the base; the apical ampulla several times longer than the basal pai*t, extending to somite X or XI. Sperm- duct about three times as long as the atrium and bulb, and about three times as long as the funnel. Funnel long, narrow, and .igh three somites; about six Bulb large, globular. Atrium. Fig. Mesenchytraus /tarrimatit. cylindrical, extending forward thro times as wide as the 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;
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