Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 236 Dzvellers of the Sea and Shore hatch, a striking revelation greets us in the appearance of tlie embryo. It has become ciistinctly trilobate in character. As in the trilobite, a highly arched ridge runs lengthwise over the middle region of the body, the sutures between the segments of the hind body are somewhat bent, and the outer edge, or lateral plate, of each segment Is strongly convex. ^'^^â¢â '-â :â â .'â â â â â¢â .â ' â â â 'â â â. â ⢠⢠A-''â -â â ;-;-<':^i; ./<?-;, ,.A??f;â¢^s^;:::â v\:.;.:.^ â¢â » TRILO
Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 236 Dzvellers of the Sea and Shore hatch, a striking revelation greets us in the appearance of tlie embryo. It has become ciistinctly trilobate in character. As in the trilobite, a highly arched ridge runs lengthwise over the middle region of the body, the sutures between the segments of the hind body are somewhat bent, and the outer edge, or lateral plate, of each segment Is strongly convex. ^'^^â¢â '-â :â â .'â â â â â¢â .â ' â â â 'â â â. â ⢠⢠A-''â -â â ;-;-<':^i; ./<?-;, ,.A??f;â¢^s^;:::â v\:.;.:.^ â¢â » TRILOBITELIKE LARVA OF THE HORSESHOE CRAB. Finally the membrane ruptures and liberates the larva. The larva differs from the embryo in that the abdomen is broader and flatter, and that the sutures between the lateral plates have disappeared, leaving segmented only a keellike middle ridge. It is now a little more than a tenth of an inch in length and a trifle less in breadth. Immediately it shows great activity by vigorously striking out into the water and swimming away. For about three weeks it lives a more or less nomadic life, wandering widely in this period, when at the end it molts and settles to the floor for good. Witii
Size: 1851px × 1081px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
