. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. ENCHYTR^ID^ 25 medium size, with about sixteen large gland-fascicles opening at the entrance of the atrium into the bulb. One set of penial glands inside the bulb. Sperm-sacs extending back some thirty somites. Nephridia with two principal lobes and with a small urinary bladder at the pore. From this bladder down- ward the duct is repeatedly twisted, and at least once branched. Color yellowish, with brownish flush on the dorsal side owing to pigment. Locality. — Tliis, the most gigantic of all the Enchytrajids, so far as now
. Alaska. Natural history -- Alaska; Scientific expeditions; Alaska. ENCHYTR^ID^ 25 medium size, with about sixteen large gland-fascicles opening at the entrance of the atrium into the bulb. One set of penial glands inside the bulb. Sperm-sacs extending back some thirty somites. Nephridia with two principal lobes and with a small urinary bladder at the pore. From this bladder down- ward the duct is repeatedly twisted, and at least once branched. Color yellowish, with brownish flush on the dorsal side owing to pigment. Locality. — Tliis, the most gigantic of all the Enchytrajids, so far as now known, seems to have an extensive distribution in Alaska, and may possibly reach even as far south as California. Years ago I found a gigantic Mesenchytrceus at Horse Corral Meadow in the Sierra Nevada of Fresno County, Cali- fornia. The specimen was unfortunately lost before I could describe it, but the sim- ilarity to M. Jiarri- inani is so great that it is not impos- sible that the two are identical. The elevation of Horse Corral Meadow is maybe about 7,000 feet, so that the al- titude would make up for the latitude. Of course it is impos- sible to know whether or not the specimen was identical with M. harrimani., but the outward appearance, so far as I can remem- ber, certainly was the same. The Alaska specimens were collected by members of the Harriman Expedition, principally as fol- lows : By Prof .W. E. Ritter, Kadiak, Alaska, August, 1S99; by Prof. Trevor Kincaid, Orca, Alaska, June, 1899; Metlakatla, June 4 ; Sitka, June ; Lowe Inlet, British Columbia, June ; Yakutat, Alaska. I possess also several adult specimens collected by Prof. W. Fig. 5. Mesenchytrceus 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 (Washingto
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