94 A. E. Verr'dl—Berniudimi and West Indian Reef Corals. 



Orbicella annularis (Ellis and Sol.) Dana. Star Corals. 



Madreijora astroites Pallas, Elench. Zooph., p. 320, 1766 (not of Linne, ed. x, 



p. 796, which was a palaeozoic fossil, nor of ed. xii). 

 ?? Madrejiora acropora Linne, Syst. Nat., ed. xii, p. 1276, 1766. (Probably 



not this species, perhaps a Solenastrcea, but indeterminable.) 

 Madrepora annularis Ellis and Solander, Nat. Hist. Zooph., p. 169, pi. liii, 



fig. 1, 2, and Madrepora faveolata, p. 166, pi. liii, figs. 5, 6, 1786. 

 ?? Madrepora acropora Esper, Pflanzenth., Fortsetz., i, p. 21, pi. xxxviii, 1797, 



(non Linn^, Syst., ed., xii, p, 1276.) 

 Astrea annularis lumxiaxck, Hist. Nat. A.nim. s. Vert., ii, p. 259, 1816. 

 Astrea annularis Lamouroux, Exp. Meth. Genres de Polyp., p. 58, pi. liii, 



figs. 1, 2, and Astrea faveolata, p. 58, pi. liii, tigs. 5, 6, 1821. 

 Astrea {Orbicella) annularis Dana, Zoophytes U. S. Expl. Exp., p. 214, pi. x, 



fig. 6, and ? A. (O) stellulata, p. 215, pi. x, fig. 7, (variety,) 1846. 

 HeUastrcea annularis Milne-Edwards and Haime, Hist. Nat. Coral]., ii, p. 473; 



and ? HeUastrcea acropora, p. 477, 1857. 

 Heliastrea annularis ; + H. acropora ;-^H. iamarcAu' Duehassaing and Michel- 



otti, Mena. Corall. Antilles, p. 352, [76], 1861 (t. Vaughan from types, non H. 



Lamarckana E. and H.). 

 Orbicella annularis Verrill, Proc. Boston Soc. Nat. Hist., ix, ]3. 33, 1862, rate 



of growth. 

 Phylloccenia seulpta + P. limbata + Cyphastrcea costata {pars) + Astrcea Barba- 



densis Duncan, Quart. Journ. Geol. Soc. London, xix, pp. 432-444, pi. xv, 



figs. 6, 6a, 1863, all fossils, (t. "Vaughan from types). 

 Plesiastrcea ramea Duncan (fossil), op. cit., xx, p. 39, 1864 (t. Vaughan). 

 Orbicella annularis Yervill, Bull. Mus. Comp. Zool., i, p. 48, 1864; Pourtales, 



Flor. Reefs, Cor., Mem. Mus. Comp. Zool., vii, No. 1, pi. iv, figs. 1-10, 1880. 

 Orbicella annularis A. Agassiz, Bull. Mus. Comp. Zool., xx, No. 2, p. 61, pis. 



i, ii, 1890, rate of growth. Verrill, these Trans., x, p. 553, 1900. 

 Orbicella acroiwra {pars) Gregory, Quart. Jour. Geol. Soc. Lond., Ii, p. 272 



{non 'Linne,) ; + Oyphastr(ea costata, p. 274:; + Echinopora Franski, p. 274, 



pi. xi, figs. 2a, 2b, 1895, (teste Vaughan from types). 

 Orbicella acropora Vatighan, Bull. Mus. Comp. Zool., xxviii. No. 5, p. 275, 



1899; Samml. Geol. Reichs-Mus., ii, p. 22, 1901, (not of Gardiner, 1899). 



Plate XV. Figure 1. 



This common and well known species was admirably figured by 

 Professor L, Agassiz in the plates of Florida Reefs, published by 

 Pourtales, 1880. 



It shows considerable variations in the size of the calicles ; in the 

 extent to which they are crowded together ; in the prominence of 

 their borders above the intervening exotheca ; in the prominence of 

 the septa above the walls ; and in the extent to which the small 

 septa of the third cycle are developed. But yet these variations, so 

 far as I have seen, never go so far as to render difiicult the recogni- 

 tion of the species, unless the specimens are badly worn. 



