329 [VerriU. 



Muricea robusta Verrill, 1. c. p. 36. 



Panama, common. F. H. Bradley. Found also at Acapulco. The 

 color when dry, varies from white to brown. 



Muricea appressa Verrill, 1. c. p. 37. 



Panama, very common. F. H. Bradley. The color when dry, is 

 either dark brown or grayish yellow. 



Echinogorgia arbuscula sp. nov. 



Coralliim with a broad, spreading, encrusting base, extendino- be- 

 yond the horny secretion, and covered with verrucas. From this 

 arise from one to twelve stalks, Avhich branch closely in an irregu- 

 larly dlchotomous manner, forming close, dense clumps, often with 

 crooked branches, which occasionally coalesce. Branches .12 to .15 

 of an inch in diameter, blunt at tips, with prominent, closely crowded, 

 somewhat oblong, verrucae, .03 or .04 in diameter, and about the 

 same in height. Surface coarsely granulate with red spicula. Axis 

 rather stout, black and rigid, somewhat compressed. Heio-ht of 

 largest specimens six inches. Color bright red. Young specimens 

 have a basal expanse resembling Sympodium, the first stalks are 

 clavate, and often three inches high before branchinor. 



Panama, not rare. F. H. Bradley. 



Sympodium Paciflca sp. nov. 



Corallum spreading over the surface of dead shells, forming bands 

 •3 of an inch Avide, and rather thin, with scattered verrucie, which 

 are large and quite prominent (about .1 inch in diameter). The 

 color is deep red, inclining to orange. 



Panama, common. F. H. Bradley. 



Zoanthus (Mammilifera) Danse LeConte, Proc. Phil. Academy of 

 Nat. Sciences, Vol. v. p. 320, 1851. 



Panama, J. L. LeConte. 



Porites Panamensis sp. nov. 



Corallum glomerate, encrusting rocks, or forming nearly globular 

 masses, with an irregular, lobed exterior. Texture rather loose and 

 porous. Cells of moderate depth, with thin walls covered with fine 

 spinose processes. Septa twelve, distinct, composed of united tral)ec- 

 uloe, the surface covered with small, spine-like points, and appearing 

 slightly thickened. Open spaces between, broader than the septa, 

 which mostly unite at their inner edges, and surround a small open 



