602 Verrill, Notes on Radiata. 



Montipora Blainville (emended). 

 Mont /par a nud Pontes (jMrs) Blainv., Diet, des sci. naturelle, t. Lx, 1830; Manuel 



d'actinol., p. 388, 1834. 

 Montipora Quoy and G-aimard, Voy. Astrolabe, Zo5ph., p. 247, 1833. 

 Manopora Dana, Zooph., p. 489, 1846. 



Alveopora Edw. and Hahna, Polyp, foss. des terr. pal., p. 146, 1851, {non Blainville). 

 Montipora Edw. and H., Corall., iii, p. 2G7, 1860. 



Corallum various in form, glomerate-massive, encrusting, foliaceous, 

 lobate, or branching. Corallites small, scattered over the surface, 

 either immersed, or with irregular, someAvhat raised, lacerate, or spin- 

 ulose borders. Coenenchyma abundant, porous or spongy, usually 

 echinulate at the surface, and often rising into papilliform processes, 

 ridges, or crests between the cells ; usually very different on the two 

 surfaces. Cells small, widely separated, deep, without cohimella or 

 pali. Septa little developed, either six or twelve, often trabicular, the 

 secondary, when present, smaller than the primary ones. Polyps with 

 twelve short tentacles. 



Montipora fragosa Veniii, sp. nov. 



Corallum sub-ramose or lobate, forming irregular conglomerate 

 masses, which become elevated, and at the summit divide into small 

 unequal, somewhat acute, very papillose branches, or into large, ex- 

 panded, flat-topped lobes, which are scarcely papillose above. The 

 papilhc on the branches and outer sides of the lobes are very slender 

 and elongated, unequal, roughly spinulose, and directed obliquely up- 

 ward. The cells are distinctly scattered among the papillffi, small 

 (about '02 inch), very inconspicuous, with six distinct septa. Towai'd 

 the summits of the lobes the papillae are appressed to the surface and 

 become indistinct. On the broad summits of the nearly flat lobes 

 there are no papillae and the surface is nearly even, having a very 

 open, porous, or spongy structure, with few indistinct, immersed cells. 

 On the smaller lobes and depressed parts of the larger ones the surface 

 rises into small rounded lobules, or large rounded varruca?, with an 

 openly spinulose, lacerate surface. Color of the unbleached coral 

 brownish yellow, in some parts i^inkish. Height 3*4 inches; breadth 

 at top 4 ; diameter of branches '25 to '75; of larger lobes 1-75 ; length 

 of free branches "50 to •80; length of longest papillae '10; diameter 

 •01 to "02 of an inch. 



" California,"— Maj. Wm. Rich. Probably from the Gulf of Cali- 

 fornia. 



