304 Dr. F. Briiggemann on Stony Corals. 



Sc. lacertty except an inferior size and a less developed colu- 

 mella, characters indicating merely a younger age of the 

 specimens. The authors state that the principal septa are 

 very distinct from each other (?) and from the smaller ones. 

 This peculiarity is indeed expressed in fig. 15 on pi. x. ; but 

 it is not represented in fig. 11 on pi. ix.*). In Sc. lacera 

 the principal septa are sometimes more, sometimes less, dis- 

 tinct from those of the following orders. The development 

 of the sixth cycle is also variable in this species, as already 

 mentioned by the accurate observer Pallas : — " Lamella ma- 

 jores centre contigu^e ; at his inter] ectffi plerumque quinaj 

 (raro plures), longitudine et altitudine sensim minores." 



3. Scolymia duhia. B.M. 



Fvnfftts marinus t^r., Seba, Thes. iii. p. 199. no. 2, pi. cviii. fig, 2. 

 LithaphyUia dubia, Duch. k Mich. Mem. Accad. Tor. (2) xix. p. 344, 

 pi. ix. fig. 15 5 Pourtales, Cat. Mus. Comp. Zool. Cambr. iv. p. 70. 



Hob, St. Thomas ; Gulf-stream, Looe Key {PourtaUs). 



4. Scolymia vitiensis. B.M. 



Coral short cylindrical, somewhat enlarged towards the 

 calicle. Xo distinct epitheca. Costaj not Avell pronounced, 

 scarcely prominent, armed with strong pointed spines which 

 are directed outwards. Calicle rounded, slightly oblong and 

 iiTegular, very shallow, the free edges of the septa being only 

 slightly inclined. Septal systems indistinct. Septa most 

 delicately and densely granulate on their surfaces, belonging 

 to five complete cycles ; those of the first three orders sub- 

 equal, thick, their three inner edges with a small number 

 (about five) of large teeth, the innermost and outermost of 

 which are pointed, whereas the one or two intermediate are 

 obtusely rounded at the top. Septa of fourth cycle much 

 thinner, with more numerous, subequal, obtuse teeth, those 

 of the fifth very narrow and short, partly rudimentary, 

 their edges irregularly denticulate. Columella very dense, 

 with subimbricate surface, the trabecule being enlarged to 

 horizontal somewhat crimpled lamellulEe. Endothecal dis- 

 sepiments much developed ; exotheca wanting. 



Hah, Feejee Islands [F. M. Eayner). 



The single specimen measures nearly 3 centims. in height, 

 and 4 centims. in its largest diameter ; it is broken at the base, 



* This figure is evideatly meant to represent part of the calicle of 

 fig. 12, although it is quoted by the authors as showing some magnified 

 calicles of Solenastrea 7nica7is. 



