644 EDWARD T. BEOWNE. 



References. 



On Microhydra. 



1885. Potts, E. — "Microliydra ryderi," Science Bulletin, p,v. (a supple- 

 ment in 'Science,' vol. v, No. 123). 



1897. Potts, E. — "A North American Preshwater Jelly Pish (Microliydra 

 ryderi)," 'American Naturalist,' vol. xxxi, pp. 1032-1035. 



On Lininocodiuni. 



1890. FoAVLER, G. H. — "Notes on the Hydroid Phase of Limnocodiuni 



sowerbii," 'Quart. Journ. Micr. Sci.,' vol. xxx, pp. 507-513, 



pi. xxxii. (This paper contains the bibliography of L i m n o c o d i u m 



up to 1885.) 

 1893. Lankester, E. R. — " Reappearance of the Freshwater Medusa 



(Limnocodiuni sowerbii)," 'Nature,' vol. xlix, p. 127. 



(Records the occurrence of Limnocodiuni at SheflSeld, and 



gives an excellent summary of its life-history.) 

 1901. Vaney, C, and Conte, A. — " Sur le Limnocodiuni sowerbii," 



'Zool. Anzeiger,' Bd. xxiv, pp. 533-534; two figures in text. 



(Records the occurrence of the Medusa at Lyons.) 

 1905. Boecker, E. — " Ueber das Vorkommen von Lininocodiuni ini 



Miinchner botanischen Garten," ' Biol. Centralbl,' Bd. xxv, pp. 605- 



606. 



On Reproduction in Hydroids by Fission. 



187 I. Allman, G. J. — " On a Mode of Reproduction by Spontaneous Fission in 

 the Hydroida," ' Quart. Journ. Micr. Sci.,' vol. xi, pp. 18-21, pi. ii. 



1871. Allman, G. J. 'Monograph of the Gymnoblastic Hydroids,' p. 151, 



6g. 61. 



1872. HiNCKS, T. — " Contributions to the History of the Hydroida," 'Ann. 



Mag. Nat. Hist.,' Series 4, vol. ix, p. 390. 

 1901. BiLLARU, A. — "De hi Scissiparite Chez les Ilydroides," ' Complcs- 

 rendus. Acad. Sci. Paris,' tom, 133, pp. 411-413. 



EXPLA.NATION OF PLATE 37. 



Illustrating Mr. E. T. Browne^s paper " On the Freshwater 

 Medusa liberated by Microliydra ryderi, Potts, and 

 a Comparison with L i m n o c o d i u m . " 



Fjg. 1. — Lateral view of the medusa of Microhyd I'a ryderi. x 150. 

 Fig. 2 — A tentacle of the medusa of Microliydra. Outer side, x 500. 



