166 Descriptions of Preparations. 



For the histolog-y of the Spongiadae, see Kolliker, leones Histio- 

 logicae, 1864, i.^ p. 46, and Dr. Bowerbank, I.e., passim. 



For the various views which have been taken as to the position of 

 the Sj)ongiadae in the animal king-dora, see Kolliker^ I. c, 

 p. 73, ibique c'ltata ; Van Beneden, Polypes, 1866, p. 198; 

 Claparede et Lachman, Etudes sur les Infusiores, i., p. 421, 

 1858-1859; Haeckel, Generelle Morphologic, 1866, ii., p. 

 xxix. ; Natiirliche Schopfungsgeschichte, i868_, p. 396. 



For the different views which may be taken as to the ' indivual^ 

 organism in the Spongiadae, see O. Schmidt, Handbuch der 

 Vergleichenden Anatomie, 1 865, p. 25 ; Lieberkiihn, Archiv. 

 fiir Anatomic und Physiologic, 1863, p. 728; Claus, Grund- 

 ziige der Zoologie, 1868, p. 52. 



