l2 PROP. p. MARTIN DUKCAN's REYISION OF THE 



exsert ; the tertiaries have costse larger than they are. The epi- 

 theca is dense near the base and pellicular near the calice, and 

 festooned. 



Locality. Japanese seas. 



There is no coral closely resembling a SmilotrocJius, OncTio- 

 troclms, or Desmophyllum which has pali. But the genus 8cM- 

 zocyatjius, Pourtales, so interesting from its budding within the 

 calice and producing the death of the parent, comes within this 

 Alliance. 



Genus Schizoctathtis, PourtaUs, Beep- Sea Corals, Zool. 

 Besults of the Sasslar Exped. 1874, p. 36. 



Corallum simple, without epitheca or costse; no columella; 

 pali in front of the last cycle of septa, united in front of the 

 penultimate ; propagating by internal gemmation. 



Locality. — Recent. Caribbean sea : Atlantic, Josephine Bank, 

 100-760 fms. 



This remarkable genus has but one species, Schizocyathusfissilis, 

 in which the growth of the bud splits the parent. 



The shape of the solitary species is long, conical, almost cylin- 

 drical, and the wall is marked outside by lines corresponding to 

 the primary septa and by rows of dots corresponding to the 

 interseptal chambers. 



Lindstrom has described a specimen of ScMzocyathii,s fissilis, 

 Pourt., which he states has an epitheca. He states " that the 

 wall proper between the septa consists entirely of the same sort 

 of thin epitheca which surrounds the whole outside of the coral, 

 or, in other words, there exists no wall as a separate formation 

 distinct from the epitheca." It appears that there is a wall 

 which every Turbinolian must have, and that it resembles epi- 

 theca, there being, however, no true epitheca. There is more or 

 less stereoplasm in the interseptal loculi. The same author 

 states that the growth is not a gemmation but an interrupted 

 and then continued growth of the same individual*. 



The genus MicrotrocJius, T. Woods, was founded upon one 

 specimen of a very young coral. It can hardly remain in the 

 classification, and bad better drop until further evidence comes 

 to hand regarding its mature form. 



* "Contributions to the Actinology of the Atlantic Ocean," 1877, p. 18, 

 K. Svenska Vetenskaps-Akad. Handl. xiv. No. 6. 



