. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . on prominent tubes marked with triangularspots of white and purple; diameter one inch. Found on the piles ofwharves and on shelly bottoms in shallow water; also on the under sideof stones when they are much flattened. C. carnea. Test low and flat, with a thin margin; adherent by a verybroad base ; orifices small, square, slightly prominent; red or in deep water on stones and shells on the northern New Englandcoast. GENUS Boltenia Body more or less globular, o
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . on prominent tubes marked with triangularspots of white and purple; diameter one inch. Found on the piles ofwharves and on shelly bottoms in shallow water; also on the under sideof stones when they are much flattened. C. carnea. Test low and flat, with a thin margin; adherent by a verybroad base ; orifices small, square, slightly prominent; red or in deep water on stones and shells on the northern New Englandcoast. GENUS Boltenia Body more or less globular, on a long stem; fixed; orifices onthe side. B. clavata. Body long, wrinkled, leathery, on a long stalk, resem-bling the flower of ladyVslipper (Cypripedium); two cross-shaped ori-fices wide apart on the side; yellowish in color; attached to stones indeep water, but sometimes washed ashore in storms. The stalks areoften covered with polyzoans and hydroids. (Plate LXXXV.) GENUS Ascidia Test gelatinous or cartilaginous; attached; it grows in bunchesunder stones at low-water mark. Sometimes it is variously col- &. 1LATK XV. A- [DIANS 1. A-riilia rallip-a. ( > III Ilia Jilai-i Hi a L, ,siTi. I!, ( i landula. li! in i-a. :.. Cyntliia 7. Cyntliia . 4, Tin-s; •. rnlar^cil. >. Boltenia clavats, !t, (ynlliia i-diinala. TUNICATES AND ASCIDIANS 477 ored, but otherwise it is repulsive in aspect. The apertures arewide apart; one orifice is eight-lobed, the other six-lobed. A. (inijthorn. Form usually globular, but more or less irregular ; sub-stance something like rubber. Found of all sizes adheringin clusters tostones, shells., and piles, and usually covered with marine growths. Thecolor is grayish-brown. A. ciillosa. Body depressed, usually oval, but varying in shape;thick, fleshy, translucent; surface uneven; apertures dark purple andprominent. Found at low tide adhering to stones and shells. (PlateLXXXV.) COMPOUND ASCIDIANS Ascidiaus of thi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
