^'mtx'] PROCEKDINGS OF TJIK NATIONAL MUSEUM. 21 



Plate xix. 



Fig. 1. Edwardma intermedin. Nat. sizo. 



^. Transvi^rso . suction through introvortod scapiis of J<]. intermedia. Zeiss A 2. 

 S. Transverso soction throiij^h incssciitcry of A', intermedia. Zeiss A 2. 



4. TrauHverse scftiou of coluuiu wall of 7;,'. intermedia, passiug through a tuher- 



rle. Zci.ss D 2. 

 f>. Oractis diomedea', viewed from tlio side. Nat. size. 

 ij. Oractis diomedea', viewed from above. Nat. size. 

 7. Transverse section of tentacle of (). diomedea; near its base. Zeiss A 2. 



5. Transverse section of cohinni of 0. diomedea. The roman numerals indicate 



the probable cnibryolo<;ical succession of the mesenteries. (An error has 

 b(;eu made in the re])roduction of this figure. The mesentery numbered 

 V should be I, ;ind the inipeifict mesentery intervening between this and 

 III should be V.) 



Pl,ATK XX. 



Fig. 9. Transverse section of a perftct mcHentery of (>. diomedea'. Zeiss a 2. 



10. Transverse section cutting eidumu wall, disc and l»ase of the tentacles of (>. 



diomedea;. Zeiss A 2. 



11. Longitudinal section through margin and iijtper j»ar( (d' the column wall of O. 



diomedea'. Zeiss a 2. 



12. Halctirias pilains. N.-it. size. 



/.?. Transverse section thron;;ii mesentery <jf //. /nliditH. Zeiss A 2. 



Pr.ATIO XXf. 



Fiff. 14. Transverse section through the uppei' j»art of the column of H.2)ilatuH. a 2. 

 15. Transverse section through e<!toderm of the column wall of //. jjilatun. 



Zeiss D 2. 

 IG. Peachia Koreni. Nat. size. 



17. Transverse section through a mesenterial filament of Actinia infecunda. 



Zeiss D 2. 



18. Anemonia varidbiliH. Nat. size. 



19. Transverse section through the column of./. varialnliH. x and y denote ;ireas 



where the regular sequeiK^e of perfect and imperfe<;t mesenteries is iuter- 

 fereil with, x about 10. 



20. Condylactin cruentata. Nat. size. 



21. Transverse sectirin of jirimary mesentery of CondylactiH cruentata. Zeiss a 2. 



22. Myonanthua ambUjunh. Nat. size. 



Pl.ATK XXII. 



Fig. 23. Transverse section of sphincter muscle of >V. ambiguua. 



24. Transverse section of sphincter muscle of lioloeera oceidua. Zeiss a 2. 



25. Portion of transversi* s<iction of primary mesentery of li. oeeidua. Zeiss A 2. 



26. Portion of transverHf; section of a tentacle of H. occidua. Zeiss a 2. 



27. Basal portion of longitudinal section through a teutacleof yy. occidua. Zeiss 



A 2 unscrewed. 



28. Portion of transverse section of a tentacle of Ji. lyannosa. Zeiss A 2. 



29. Transverse section through a perfect mesentery of li. pannona. Zeiss A 2. 



Plate xxiii. 



Fig. 30. Transverse section of the sphincter muscle of li. pannosa. Zeiss A 2. 



31. Transverse scftion of the spliinitcr uiu.scle of li. brerieornis. Zeiss a 2. 



32. Outer portion of transverse section of mesentery of /». brerieornis. Zeiss A 2. 



