. A manual of zoology. Zoology. Fig. 201. Fio. 202. Fio. 201.—Tlirce stages in development of Riitilla roiifonnis (after \\'ilson). A, cleavage of egg; B, jilanula; C, de\elopnient of a'sopliagus; cc, ectoderm; cti. ento- derm; /;/, nieso^L^lcTa; 0, a-soplia^^iis. l'" 202.—.Vmerican sea-aiieniones. .1, KtkvardsiclUi sipiiut-iiloiiJcs (after Slini]i- son). B, BiciJiiiiii parasiliiiiiii (after \'crrill). i', Biiinnhs slclla iafler XerrilO. .\; {Ah-youiuiii'''), axial skeleton is lacking, the llesh contains numerous calcareous particles (sitcrodcniiilfi). The sea pens,
. A manual of zoology. Zoology. Fig. 201. Fio. 202. Fio. 201.—Tlirce stages in development of Riitilla roiifonnis (after \\'ilson). A, cleavage of egg; B, jilanula; C, de\elopnient of a'sopliagus; cc, ectoderm; cti. ento- derm; /;/, nieso^L^lcTa; 0, a-soplia^^iis. l'" 202.—.Vmerican sea-aiieniones. .1, KtkvardsiclUi sipiiut-iiloiiJcs (after Slini]i- son). B, BiciJiiiiii parasiliiiiiii (after \'crrill). i', Biiinnhs slclla iafler XerrilO. .\; {Ah-youiuiii'''), axial skeleton is lacking, the llesh contains numerous calcareous particles (sitcrodcniiilfi). The sea pens, ;, have the basal part buried in the mud, the rest, expanded like a disc or feather, l)ears the ]iolyps. An axial skeleton usually occurs in the stalk. PiinnUidii* Rciiill(i'''\ riic (sea fans, sea whips) liaxe an axis of more firm- ness, which may be calcareous, and the colonv niav branch and the branches anastomose. Here belongs, besides nianv tropic;il gener;i whose names end in 'i^orgia,' the jn-ecious coral (Cori)lliiiiit nihrmii, hg. 11)7), the iishing for which at Naples amounts yearlv to li;df a million dolhirs. 'i'luut', orgaii-|iipc corals. The were long regarded as llexacoralla because of their skeletons with six sclerosepta. The paleozoic Syrini^ofiinui belongs near Tubipora, while the 1*"a\' resemble the .Mcyoniidx. Order III. (Zoantharia). The simple tubular ten(;icles are highly characteristic of the llexacoralla, as is the arrangement of the p;Lired septa in sixes as described abo\'e. ^'et there are exceptions to this rule. On the one hand is AVicij/i/i/u* with sixteen or. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
