MUSEUM OF COMPAKATIVE ZOOLOGY. 119 



EXPLANATION OF THE PLATES. 



PLATE 1. 



Fig. 1. Deltocyathus italicus, showing passage from variety Agassizii to variety 

 calcar. 



Fig. 2. Deltocyathus italicus, variety a, Agassizii^ section magnified. 



Fig. 3. Costfe of the same, magnified. 



Fig. 4. Deltocyathus italicus, variety /3, section magnified. 



Fig. 5. '* *' '* 7> calcar, section magnified. 



Fig. 6. " ** ** 5, section magnified. 



Fig. 7. ** ** ** 5, costfe magnified. 



Fig. 8. " ** " 5, calicle magnified. 



Fig. 9. Paracyathics laxus, profile, nat. size. 



Fig. 10. " •♦ calicle. 



Fig. 11. " " section. 



Fig. 12. Caryojjhyllia coinmunis, variety costata, nat. size. 



Fig. 13. " ** *• " calicle, nat. size. 



Fig. 14. Desmophylluin Riisei, nat. size. 



Fig. 15. Stenocyathus vermiformis, portion decalcified, magnified. 



Fig. 16. " " •* two segments separated, to 



show interrupted connections at the centre. 



PLATE n. 



Stephanotrochus diadema, specimen with the poljrp contracted, in alcohol. 

 Stcphanocyathus variabilis, " " •* ** 



Dendrophyllia alternata, nat. size. 



" *' calicle magnified. 



Anthemiphyllia patera, section *' 



** '* septa " 



Paracyathus fios, profile, nat. size. 



" " calicle, " 



Asterosmilia prolifera, calicle, nat. size. 



profile, *' 

 Dasmosmilia variegata, profile, nat. size. 



" " calicle, 



Flabellum Moselcyi, profile, nat. size. 

 " " calicle, 



