54 GUIDE TO THE FOSSIL INVEETEBEATE ANIMALS. 



Gallery X. limestone of Newton Bushel, Smithia Pengellyi in the pink 

 ^4c^& 5^^^ iind grey reefs of Barton, and the massive Cyatliwpliyllum 



helianthoides in the red rocks of Torquay and Plymouth. 



In the corner of Case 6 are specimens of Galceola sandalina, 

 Wall-ease better shown in the Eifel series; this is allied to Bhizo- 

 4c. ])]iylhLm, and, from its triangular shape and large lid, 



closely resembles some brachiopods (Fig. 2?>). 



Fig. 23. — A Devonian Operculate Coral, Calceola sandalina. a, the inside, 

 and b, the outside of the operculum ; c and d, corresponding views of 

 the calyx ; e, a specimen with the operculum closed over the calyx. 

 Slightly less than natural size. (See Wall-case 4c.) 



5. 



Table-eases The Carboniferous corals are the last of the Palaeozoic 

 Walfe^se ^^P^' ^^-^^ foreign collection includes specimens from Arctic 

 3 & 4. America, from Tournai and Vise in Belgium, and several 

 brought from the Ural Mountains by Sir Eoderick Murchison. 

 Table-ease Among the British Favositidae are the curious little Palaeacis 

 and a good series of Syringopora. Close by is Moiiilopora 

 crassa growing on crinoid stems, which become deformed in 

 the attempt to grow oyer it. Chaetetes, which follows, is 

 referred with doubt to the Alcyonaria. On the other side of 

 the Case come Amplexits and Zaphrentis, showing marked 

 bilateral symmetry in the arrangem^ent of their septa, such 

 as obtains in the mesenteries of the recent Zoanthidae, which 

 have no skeleton. In Amplexus the septa are reduced in 

 Between ^^^^ tabulae are strongly developed. There follow 



Wall-eases several genera of Madreporaria Aporosa : the cylindrical 

 3 & 4. Campophyllum, which may grow to a great length, as shown 

 Table-ease specimens from Weston-super-Mare; Lonsdcdeia and 

 Wall-ease Lithostrotion, whose prismatic tubes build up large colonial 

 4. masses, as those of the familiar Lithostrotion hasaltiforme 

 Wal^cases ^^^^ ^' from Fermanagh; Dihunophyllum, of 



3 & 4. stratigraphical importance, shown also on a fine slab from 



