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Cambrirlge, Mass., 1871. 



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34. Semper, C. — " Genera.tionswechsel bei Steinkorallen." Zeit. 



f. wiss. Zool. xxii., 1872. 

 36. Studer, T. — " Uebersicht der Steinkorallen aus der Faniilie 

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 auf der Reise S.M.S. ' CTazelle ' urn die Erde gesamuielt 

 wurden." Monatsb. k. preuss. Akad. Wiss. Berlin, 1877, 

 p. 625. 



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EXPLANATION OF THE PLATES. 

 Plate LXXXV. 



Fig. 1 a. Heterocyathus (e<j^Hicnstalu.s M.-Edw. & Hainie. Type I. 

 1 b. „' „ Type JL 



If. „ ;, Type IL approxiiiiatiiifi: type III. 



1 rf. ,, „ Txpe III. with four cynles of spptH. 

 If. „ „ Type III. with incomplete fiftli 



cych' of septa. 

 If. „ „ Type III. with fiye complete cycles 



of septa. 



2 a. Funffia cT/cloUtes. Upper surface of broken ami repaired specimen. 



2 h. Diaserls distorta Micheliu. Upper surface of specimen with two segments. 

 3rt. ,, „ Under sui'face of the same specimen. 



3 6. Funffia n/cInlUes. Under surface of 2 a. 



4 a. HalanophtjlUa diffusa, sp. n. Lateral view of the corallum. 



4 6. „ „ Diagram of the septal arrangement. 



Plate LXXXVI. 



Fig. on. Balanophyllia imperialis Kent. Lateral view of the corallum. 



oh. „ „ Diagram of the septal arrangement. 



be. „ „ A single sj'stem of septa. 



6. Dendrophyllia robusta Bourne. Lateral view of a colony. 



- 'J' I DcndrojphyUia coccinea M.-Edw. & Hainie. Diagram of the septal arrange- 



L ' r ment in three different individuals. 



7 C.J 



7 d. „ „ The calice ol an individual in the process of 



dividing, viewed from above. 



