The Cambridge natural history . Fig. 318. —Young larva ofCistdla iieupolitana,sliowiug three seg-ments, two eye spots,and two bundles ofsetne. (After Kowa-levsky.). Fig. .319. —Full--rown larva of Cis-tdla neapoiUuna, witli unilirella-shaped bead, ciliated. (AfterKowalevskv.) to be moving with surprising rapidity, but judging from theanalogy of other forms, it seems doubtful if they swim a yard inan lioni. l-requeutly the larva stands on its head for some time, as ifinvestigating the nature of the rocks on which it may settle: itis extremely contractile, turning its head from time to time,anil
The Cambridge natural history . Fig. 318. —Young larva ofCistdla iieupolitana,sliowiug three seg-ments, two eye spots,and two bundles ofsetne. (After Kowa-levsky.). Fig. .319. —Full--rown larva of Cis-tdla neapoiUuna, witli unilirella-shaped bead, ciliated. (AfterKowalevskv.) to be moving with surprising rapidity, but judging from theanalogy of other forms, it seems doubtful if they swim a yard inan lioni. l-requeutly the larva stands on its head for some time, as ifinvestigating the nature of the rocks on which it may settle: itis extremely contractile, turning its head from time to time,anil seldom retaining the same outline for any length of time ; thesetae are protruded, and at times stick out in every direction;they are possibly defensive in function. When fully stretchedout the larva is about -^ nnn. long, but it frequently shortens itsVOL. Ill 2 I 482 RECENT BRACHIOPODA chap. body to two-thirds of this length. The larvae are of a pinkishred coloiu, with eye-spots of ruby red. Their colour rendersthem diflicult to discern when they are swinnning over the redcoralline rocks upon which they frequently settle. After swim-ming about for a few
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
