54 ON THE ANATOMY OF DISTICHOPORA. 
He also describes the fossil species noticed by Defrance in Mi ¢ 
lin’s Iconographie Zoophytologique, Description des Pol 
Sossi 
columella or style seems entirely to have escaped him. 
noticed that, and its constant absence from the secondary pores 
genus, he would hardly have supposed that the latter 
nascent calices, + 
Tespecially draw attention to the fact that a fossil spee 
found in the earlier formations,—a fact amongst many others 
daily’ confront us of extinct European Tertiary species ™ 
not necessary, as he had no new observations to offer. 
_.* M. Edwards had also referred to the in his portion 
an ee vol. ii, p. 505. Bee sino Tamourow 
a Bren, Zoophyt., p. 256; Schweigger, Beov 
Mate. Hist. Reisen, of 6, fig. 61; Handbuch, p. 431. 
a u t Except the copy in s Croonian Lecture. 
