. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. ;EID^ 95 confined to somite XII. Funnels large, longer than wide, in XI. No sperm-sacs and no ovisacs. No prostates, but small and numerous penial glands confined by the peritoneum and the penial bulb. No ventral glands. Ovaries in XII and testes in XI. Nephridia with a short anteseptal, a rectangular central lobe, and a long duct. Lym- phocytes round, flat, about one-third the width of the short diameter of the nephridium. Locality. — Port Clarence, Alaska, July 23-26, 1878. Dr. Anton Stuxberg, Vega Expediti
. Enchytræidæ of the west coast of North America. Enchytraeidae; Annelida. ;EID^ 95 confined to somite XII. Funnels large, longer than wide, in XI. No sperm-sacs and no ovisacs. No prostates, but small and numerous penial glands confined by the peritoneum and the penial bulb. No ventral glands. Ovaries in XII and testes in XI. Nephridia with a short anteseptal, a rectangular central lobe, and a long duct. Lym- phocytes round, flat, about one-third the width of the short diameter of the nephridium. Locality. — Port Clarence, Alaska, July 23-26, 1878. Dr. Anton Stuxberg, Vega Expedition. Characteristics. — This species is readily distinguished from the type species, B. ehlersi., by its large intestinal diverticles, its brain, which is emarginated both posteriorly and anteriorly, and by its setas, which are so short that they cannot be studied on undissected speci- mens. Their number is also characteristic, there being only two in each bundle. DETAILED DESCRIPTION. Size. — It is remarkable that the relative length and width should vary to such extent that with the same length some specimens are but half as wide as others. I suspected at first that I had before me two distinct species, but I am unable to distin- guish any characteristics that would ac- company the difference in size. There are in all eight specimens in the collection, two of which are thick, the others thin. One of the thick specimens was sectioned longitudinally, while of the thin ones one was sectioned transversely and one was dissected. Somites.—The body is of an even thick- ness and the somites though distinct are hardly set off from each other, the inter- segmental grooves being exceedingly shal- low. This gives the body a snjooth, even, and glossy appearance. It is to be remarked that the thin speci- mens possess the largest number of somites. Setce.— The setae are not distinctly sigmoid but almost straight. They are also very short (p1. xii, fig. 30;). They begin with somit
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