512 G. HERBERT FOWLER. 
budding medusoid and of the minute free-swimming forms 
described by Lankester in 1881 differ somewhat from the 
ordinary Leptomedusan type; notably, the position of the 
budding medusoid at the end of a hydroid polyp is, I believe, 
unique. The processes of development of a medusoid by sexual 
and by asexual methods do not appear to me to be sufficiently 
alike to justify conclusions founded on this basis. 
In conclusion, I have to express my thanks to Professor 
Lankester for his assistance, and to Mr. Sowerby, the Director 
of the Royal Botanic Society’s Gardens, for many courtesies. 
Note.—The observed appearances of Limnocodium, including the record 
of Professor Bourne (‘ Proc. Roy. Soc.,’ xxxviii), are as follows: 
1880. June 10th—July 31st. 1885. April 5th—(no record). 
1881. June 12th—June 25th. 1886. August 7th—(no record). 
1882. None. 1887. “ End of May ”—(no record). 
1883. April 28th—July 25th. 1888. May 10th—? August. 
1884. April 27th—(July ?). | 1889. None. 
LITERATURE OF LIMNOCODIUM SOWERBYI. 
1880. Attmay, G. J—‘‘On Limnocodium Victoria, a New Hydroid 
Medusa of Fresh Water,” ‘Journ. Linn. Soc.,’ xv, p. 131. 
» Atman, G. J.—‘‘ The Fresh-water Medusa,” ‘ Nature,’ xxii, pp. 178, 
218, 290. 
»  LANKESTER, HE. R.—“ Ona New Jelly-fish of the Order Trachomeduse, 
living in Fresh Water,” ‘ Nature,’ xxii, pp. 147, 177, 190, 241 
‘Zool. Anz.,’ ili, p. 321. | 
»,  LANKESTER, EH. R.—‘ Meduse and Hydroid Polyps living in Fresh 
Water,” ‘Quart. Journ. Micr. Sci.,’ xx, p. 483. 
, LANKESTER, HE. R.—“On Limnocodium (Craspedacustes) 
Sowerbii, a New Trachomedusa inhabiting Fresh Water,” 
‘Quart. Journ. Mier, Sci.,’ xx, p. 351. 
Romangs, G. J.— The Physiology of the Fresh-water Medusa,’’ 
‘Nature,’ xxii, p. 179. 
bP] 
1881. Lanxester, E. R.—* On the Intracellular Digestion and Endoderm 
of Limnocodium,” ‘ Quart, Journ, Micr, Sci.,’ xxi, p. 119, 
