RECENT RESEAECHES ON THE EADIOLARIA. 



185 



MACDOXALDjDr. J. D. Ann. & Mag. Nat. Hist. 4tb ser. vol. viii. 

 p. 224, 1871. 



(A short paper, containing a notice of Acanthometra and 

 DictyocJia, with a woodcut of Astromma Yelvertoni, and obser- 

 vations on modes of growth.) 



L. CiENKOWSKi. Archiv f. mikrosk. Anat. vol. vii. p. 371, 

 pi. xxix., 1871. 



(A valuable paper, wherein is first accurately described the for- 

 mation of zoospores, with observations on the reproduction of 

 CollospTKPra and Collozomn, and notes upon yellow cells. This 

 paper has been translated in the ' Quarterly Journal of Microsco- 

 pical Science, (n. s.) vol. xi. p. 396, pi. xviii.) 



W. DoxiTz. Arch. f. Anat. und Phys. p. 71, plate ii., 1871. 



(Observations on E-adiolaria, in which he treats of Thalassicolla, 

 Collozoum, and ^plicerozoum, describing a new species {8. Sanderi) 

 of the last-named genus. He appears, though, to have confounded 

 the earlier with the later stages of Collozoum, and fallen into 

 other errors of interpretation : see Hertwig, Zur Hist. d. Had. 

 pp. 9, 10.) 



Heetwig and Lessee. Archiv f. mikrosk. Anat. vol. x. Suppl. 

 p. 147, 1874. 



(In this treatise the question of the relationship of the Eadio- 

 laria to the Heliozoa is considered ; and they are said to have no 

 near relationship.) 



FocKE, Gr. W. Zeitschrift fiir wissen. Zoologie, 1868, vol. xviii. 

 p. 345. Translated in ' Quarterly Journal of Microscopical 

 Science,' vol. ix. 1869, pp. 67-75. 



(The author considers some Heliozoa discovered by him as true 

 freshwater Eadioiaria ; but they do not present true Eadiolarian 

 characters.) 



W. Aechee. Quarterly Journal Microsc. Science, (New Ser.) 

 vol. ix. p. 250, 1869. 



(Freshwater Heliozoa described, with a reference to Focke's 

 paper, asserting the existence of pulsating vacuoles.) 



Geeef. Archiv fiir mikrosk. Anat. vol. v. p. 464, and vol. xi. 

 p. 1, pis. i. & ii. 



(In the former paper the author describes Heliozoa, and is 

 inclined to regard the inner body of Clathrulina as representing 

 the Binnenblase of the Eadioiaria. In the latter place he recon- 

 siders the homology asserted by some {e. g. A. Schneider) to exist 



LINN. JOUEN. — ZOOLOGY, VOL. XIV. 13 



