Medusae of the world . 128. Fig. 124.—Obelia rommissuralis, after A. Agassiz, in North American Acalephae. Fig. !2f.—Obelia diehotoma, after Hincks, in British Hydroid Zoophytes. Fig. 126.—Obelia articulata (=0. diehotoma), after A. Agassiz, in North American Acalcphx. Fig. 127.—Obelia dichotoma, after Hincks, in British Hydroid Zoophytes. Fig. 128.—Obelia piriformis, after A. Agassiz, in North American Acalephs. internodes of the branches. Each polypite has 24 to 30 long, slender tentacles. The mouthis at the extremity of a prominent proboscis. The hydrotheca is about times as long aswide
Medusae of the world . 128. Fig. 124.—Obelia rommissuralis, after A. Agassiz, in North American Acalephae. Fig. !2f.—Obelia diehotoma, after Hincks, in British Hydroid Zoophytes. Fig. 126.—Obelia articulata (=0. diehotoma), after A. Agassiz, in North American Acalcphx. Fig. 127.—Obelia dichotoma, after Hincks, in British Hydroid Zoophytes. Fig. 128.—Obelia piriformis, after A. Agassiz, in North American Acalephs. internodes of the branches. Each polypite has 24 to 30 long, slender tentacles. The mouthis at the extremity of a prominent proboscis. The hydrotheca is about times as long aswide, and its upper edge is smooth and circular. The reproductive calycles are situated atthe bases of the pedicels of the polypites and also at the origins of the side branches from themain stem. They are borne upon short, cylindrical stalks composed of 5 or 6 rings. Thecalycle is slender and conical, tapering gradually from the proximal to the distal end where it 246 MEDUSAE OF THE WORLD. terminates in a short
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookyear1910, obeliadichotoma
