of the Authozoa Tabulala. 11 



different forms. Referable to Trematopora or Coenites, bu> 

 not to MonticuUpora as stated by De Koninck (An. Foss. 

 p, 142). 

 % NehuUpora.,WQoj{Axm.^sA. Hist. 1850, vi. p.283), =1/0/1- 



ticuUpora. 

 ^ Orhipora^ Eicliw. (Leth. Ross. i. p. 484). Comprises dis- 



coidal Monticuliporce or ChcBtetes. 

 C OrbituUtheSj Eichw. (Zool. Spec. i. p. 180). Identical witli 

 ^MonticuUpora. 

 ■^ Phcenopora, Hall (Pal. N. Y. vol. ii. p. 40). 



Pustulipora^ Keyserling (in Schrenk's ' Reise in der Norden 

 Russlands,' vol. ii. p. 101). According to Eichwald (Leth. 

 Ross. vol. i. p. 451), identical with his Myriolithes. 



Rhinopora^ Hall (Pal. N. Y. vol. ii. p. 48). Identical with 

 MonticuUpora. 



Stellipora, Hall (Pal. N. Y. vol. i. p. 79). Identical with 

 Constellaria. 



Stenopora., Lonsd. (in Strzelecki, Phys. Descr. N. S. Wales, 

 p. 262, and Geol. of Russia, vol. i. p. 631). At first called 

 TuhuUclidia. 



Stomatopo7'a^ Bronn (Leth. Geogn. i. p. 54). Comprises 

 young colonies of Syringopora^ along with the stolons of 

 Bryozoa of various formations. 



^ Tetradium^ Dana (Zooph. p. 701). Related to Chaitetes. 

 ^■'' y^ Trematopora.^ Hall (Pal. N. Y. vol. ii. p. 149). A branching 

 Monticuliporoid, with characters of the ^^ Fistulipora stage." 



Verticillipora, M'Coy (Carb. Foss. Ireland, p. 194). A 

 dubious Chwtetes. 



It now remains to pass under review the other genera of the 

 old order of the Tabulata. Since the researches of Dana 

 (' Corals and Coral Islands,' p. 76), Kent (Ann. Nat. Hist. 

 1870, vi. p. 384), and Verrill (Amer. Journ. Sc. & Arts, 1872, 

 p. 187), there can no longer be any doubt that Favosites and 

 the closely related Roemeria^ Emnionsia, Striatopora, Ko- 

 \ mnckia, Pachypora^ n. gen.*, and Nodidipora^ n. gen.f, belong 



* Pachypoba, nov. gen. 



Calyces annuliformes, ad summitates ramulorum, oblique seruilunati, 

 septis sparsis, spiniformibus. Strata densissima, tenuissime lamellata 

 calyces circumdant, iinde hi in superficie spatio aliquanto inter se di- 

 stantes, muri canaliculis perforati. Species unica P. lamellicornis n. (for- 

 sitaji=Mi/lepora I'amis var/is, jmnctis sparsis, Linn., Cor. Baltica, p. 27, 

 tig. xii.) ramos habet complanatos, quorum complures inter se coalescunt 

 et laminas latas forraant ; calyces annuliformes vel oblique lunati, hi prfe- 

 sertim septis muniti. Tabulae rarissimae vel obscurse. Occurrit ad Visby. 



t NoDULiPORA, nov. gen. 

 Polyparium turbinatum, totum e nodulis minimis coutextum, cetenim 



