File:Quarterly journal of microscopical science (1859) (14761826806).jpg

Identifier: quarterlyjournal71859lond (find matches)
Title: Quarterly journal of microscopical science
Year: 1859 (1850s)
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Publisher: London, J. and A. Churchill (etc.)
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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I have not yet received (De-cember 1 st) his great Prize volume—only a few copies havingat present crossed the Channel. Although I have elsewhere expressed my adhesion to theviews of Siebold and others as to the dermo-skeletal cha-racter of the calcareous bodies^ I suppose we must—if Clapa-rede^s observations are correct—henceforth regard these flask-shaped capsules, with their contained sclerous particles, asexcretory organs, notwithstanding that they do not appear tohave any connexion with the water-vascular system. Note on a Structure observed in Surirella.—In the course of arecent examination of some slides of Californiau gviano, thematerial of which was communicated to me by Mr. J. T.Norman, I observed an example of a species of Surirella,exhibiting an appearance of considerable interest. Thefrustule (which presents the side vicAv) is injured, a consider-able portion of the valve nearest to the eye being removed;the result is the exposure of a structure which, so far as I
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Length -OOiO. Breadth -0019. Canaliculi 4 in -001. Areola 15 in■001. Striae of median line 25 in 001. know, has not hitherto been noticed. This structure is astrong, areolated septum or valve of a yellowish colour,stretching across the entire frustule, distinct from, and * See Translation, in another part of the present number of thisJournal. MEMORANDA. 117 separating tlie two external valves. The areolae are by nomeans very minute^ being only about 15 in 001, and theyare regularly hexagonal. The portion of the valve whichremains entire exhibits part of a narrow transversely striatedmedian line; and^ arising from it^ canaliculi^ as in S. lataand fastuosa, very conspicuous at the base^ but suddenlybecoming inflated and faint. These characters are strictlyconfined to the valve; for on accurately focussing the interiororgan^ nothing whatever is perceptible but the beautiful anduniform areolation. On slightly changing the focus^ themedian line and canaliculi of the valve beneath are the

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