CCELENTERATA. 



ence of Palaocoryne to the order Corynida not wholly free from 

 doubt. 



The genus Corynoidcs was proposed by the author for some 

 singular fossils from the Lower Silurian 

 . Rocks of Scotland. Each consists of 



C/^V a cylindrical corneous tube (fig. 23), 

 I J tapering towards the base, where it is 

 /' / furnished with two small spines, and 



expanding above into a species of 

 toothed cup. Corynoides consists of a 

 single polypite, and in this respect may 

 M be compared with some living Cory- 



11 nida. It would seem, however, not to 



have been attached to any foreign 

 body as all living Corynids are 

 and its true affinities are thus rendered 

 uncertain. 



II. THECAPHORA (or Sertularida and Campanularidd). 

 Animal compound, rooted and plant-like, consisting of numerous 



Fig. 23. Corynoides cali- 

 cularis, enlarged. (Origi- 

 nal.) 



Fig. 24. a Sertularta (Difihasia) pimtata, natural size: 4 Fragment of the same en- 

 larged, carrying a male capsule (o), and showing the hydrothecse (AJ ; f> Fragment of 

 Campanularin neglecta (after Hincks), showing the polypites contained in their hydro- 

 thecae (h), and also the point at which the coenosarc communicates with the stomach of 

 the polypite (o). 



polypites united by common flesh or coenosarc. The avnosarc is 

 more or less branched, and secretes a strong chitinous investment or 

 The polypites are also protected -within " hydro- 



