A. 11 Yerr'dl — Berrnudian and West Induoi Reef Corals. 12*7 



hrietly described by Pourtales as iiudtdamella, which seems quite 

 distinct from the species to which he doubtfully referred it. 



Bermuda and the Florida Reefs. Occurs also in tlie West Indies, 

 at the Bahamas, etc. It occurred on the Serpuline Atolls, near 

 Hungry Bay, and in Great Sound, Bermuda. 



Mussa (Symphyllia) hispida V., sp. nov. 



AstrcBa dipsacea Dana, Zoopli., p. 225, pi. xi, figs. 4-4f7, 1846 (>ioji Lam.) 

 Acanthasfrcea dipsacea Verrill, in Duna, Coral Islands, ed. 1, p. 380 ; ed. 3, p. 

 421, -1890, nonE. & H. 



Plate XXI. Figures 2, 2a, 2b, 2c. 



Dana's type of this species is preserved in the Museum of Yale 

 University in good condition. No. 4287. 



It is an astreiform, hemispherical mass, about 100™™ in diameter. 

 The calicles are mostly simple and clearly circumscribed ; some are 

 circular, but many are elliptical or irregular ; some are elongated 

 and have 2, 3, or 4 centers in a series, as in T. multiflora. 



The walls between the calicles are double and separated by an 

 openly vesicular exothecal structure, the proper wall being thin and 

 solid. The septa are thin, sharply granulated laterally, deeply lacin- 

 iate, especially near the columella, and have long, rough, lacerate 

 and hispid teeth, largest toward the top. The columella is large, 

 loosely and coarsely trabecular, with rough spines on the surface. 

 In a section the coral appears very cellular ; the endothecal dissepi- 

 ments are compound, long, and much inclined ; septa are perforate 

 and trabecular. 



Diameter of calicles, 8 to 18"™ ; the elongated calicles with two 

 or three centers may be 25 to 30™" long ; 10 to 12™™ wide ; depth 

 7-10"'™ ; distance between them, 2 to 4™™. West Indies (t. Dana). 

 Rare in collections. 



This species resembles AcantJtastrcea, in which I formerly placed 

 it, but it has the structure of a Mussa. The double wall and 

 vesicular exotheca are not found in Acanthastra?a, nor the elongated 

 calicles with several centers, dividing by fission. 



The locality of Dana's type was uncertain, but was supposed to be 

 West Indian. A similar sj^ecies is found at Pernambuco, Brazil, 

 See below; List of Brazilian Corals, and pi. xxi, f. 3. 



Mussa (Symphyllia) rigida (Dana) Ver. 



Astra'a {Fissicella) rigida Dana, Zooph., yy. 237, pi. xii, figs. 8a-8(7, 1846. 

 PrionastrcBa P rigida Edw. and Haime, Hist. Corall., ii, p. 523, 1857. 

 Isophyllia rigida Verrill, Bull. Mus. Comp. Zool., i, p. 50, 1864 ; Coral Islands, 

 ed. 3, p. 422 {non Pourtales). 



