504 MR. H. N. RIDLEY ON THE 



POLYZOA. 



Ey E. KiRKPATRICK, 



Assistant in Zoological Department, British Museum. 



POLYZOA. 



The specimens chiefly encrust shells, and are generally much 

 worn away. 



1. Aetea recta, Sinchs. 



2. Stnnotum aviculare, Pieper. 



3. SCRUPOCELLARIA TRONDIS, U. sp. 



4. Cribrilitsa radiata, Moll. 



5. Smittipora antiqua, Busk. 



{Mollia antiqua, Smitt.) 



6. SxEaANOPORELLA Smittii, HliicJcs. 



7. Mastioophora Dutertrei, Audouin. 



8. SCHIZOPORELLA UKICORNIS, Jolniston. 



9. Lkpralia depbessa, Busk. 



(^EscTiarella rostrigera, Smitt.) 



10. LePBALIA CLEIDOSTOMA, Smitt. 



11. EHT^'cnoPORA bispinosa, Johist. — (Encrusting Oorgonia 

 axis.) 



12. Cellepora Eidleyi, n. sp. 



13. MiCROPORELLA viOLACEA, Jokiist. — Eucrustiug Gorgoiiia 

 axis ; (both purple and white varieties). 



14. Crisia Holdsworthii, Busk. 



15. Amaxhia brasiliensis, Busk. 



Family Celltjlariiu.i;. 

 Genus Scrupocbllaria. 



SCRTJPOCELLARIA PRONDIS, n. sp. 



Zooecia of medium size, alternate ; area oval, occupying nearly 

 half the front of cell ; spines 2-4 on the outer side, 2 on the 

 inner ; lowermost spine on outer side bending over the top of 



