1853.] RIBEIRO AND SHARPE BUSSACO. 147 



c. Magnified portion of another and older specimen, in which 

 the projecting ends of the transverse tubes entirely conceal the 

 polyp-cells. 



d. Magnified view of a transverse section. 



Synocladia Lusitanica, n. s. Pl. VII. fig. 9. 

 S. ramosa, ramis bifurcatis, coalescentibusque irregulariter reticulata : cel- 

 lulis quadri-serialibus, quarum bases ordinum duorum superficiera 

 ramoram externam occupant. 



Coral consisting of branches of nearly uniform thickness, which 

 divide and reunite irregularly, forming a very loose network, with 

 long, narrow, unequal meshes : the branches are covered on one side 

 with the openings of the cells, which are usually arranged in four 

 rows, and on the other side they display the closed portions of two 

 of the rows of cells placed alternately. The general form of the , 

 coral has not been seen. 



Breadth of the branches about Jg-th of an inch. 



This elegant zoophyte and the species next to be described differ 

 from the typical species of Mr. King's genus Synocladia in having 

 the forms of two rows of the cells distinctly shown on the reverse of 

 the branches, and also in having the transverse nearly equal to the 

 main branches ; but until they are better known they may most fitly 

 be classed in that genus, which is distinguished from its nearest ally, 

 Fenestella, by having cells on the cross branches. 



Found in the upper division of the Lower Silurian formation at the 

 Porto de Santa Anna, in the Serra de Bussaco. 



Plate VII. fig. 9. a. Portion of the coral of the natural size. 



b. Outer side of a branch magnified. 



c. Impression of the inner side of a branch magnified. 



Synocladia hypnoides, n, s. Pl. VII. fig. 10. 



S. ramosa, ramis bifurcatis coalescentibusque laxe reticulata : cellulis bise- 

 rialibus, linea depressa utrinque divisis. 



Coral consisting of an irregular network of branches which divide 

 and reunite without sxij order, and which are all formed of two rows 

 of cells : on one side of the branches are seen the openings of the 

 cells separated by a deep, longitudinal depression along the branch ; 

 on the other side the outline of each cell is marked by a depressed 

 line, also continued down the middle of the branch. 



The general form of the coral has not been seen. 



Breadth of the branches about g^jth of an inch. 



This species is distinguished at once from the preceding by being 

 furnished with only two rows of cells, and also by a more irregular 

 growth ; its general habit coupled with the depressed line down each 

 side of the branches give it a strong resemblance to a moss. 



Found in the upper division of the Lower Silurian formation at the 

 Porto de Santa Anna, in the Serra de Bussaco. 



Plate VII. fig. 10. a. Portion of the coral of the natural size. 



b. Outer side of a branch magnified. 



c. Impression of the inner side of a branch magnified. 



