486 



them are represented in the middle of the branchlet, as well as on 

 the side, where I have never observed them in Melitcea ochracea. 



f Branchlets divaricated, reticulating, inosculating* 



2. Melitella retifera. B.M. 



Melitcea retifera ) Lamk. 



Isis coccinea, Esper, Pflantz. t. 10. 



Isis aurantia, Esper, t. 9 ? Cells too prominent and conical ; 

 branches diverging. 



Var. ? Melitcea textiformis, Lam. Pol. Flex. 465. t. 19. f. 1 ; Esper, 

 t. 71. f. 5. 



3. Melitella coccinea, Lamk. B.M. 



Isis coccinea, Ellis, Zooph. t. 12. f. 5. 

 M. Rissoi, Lamk. 



4. Melitella ? tenella. 

 Melitcea tenella, Dana, Zooph. 683. 



4. Mopsella. 



Coral tree-like, forked ; branches diverging. Cells on the sides 

 and one surface of the branches ; other surface smooth. Axis cal- 

 careous, solid, longitudinally grooved. 



1. Mopsella dichotoma. B.M. 



Mopsea dichotoma, Lamx. 



Isis dichotoma, Esper, Pflantz. p. 5. t. 11. f. 4, 5. 

 Joint short, thick, striated. 



2. Mopsella gracilis. B.M. 

 Coral very slender, thread-like ; joint elongate, slender, pale red ; 



articulations only slightly swollen ; branches divaricating, the first 

 rather rounded at their base. 

 Hab. — -? 



*** Cells not prominent , scattered equally on all sides of the 

 branches ; branches cylindrical, of a nearly uniform thickness. 

 Axis solid. 



5. Clathraria. 



Coral tree-like, erect ; branches few, inosculating, tortuous ; 

 branchlets, some free, blunt ; bark thin, granular. Cells numerous. 

 Axis solid ; joints elongate, white, longitudinal, striated ; internode 

 red, spongy. 



1. Clathraria rubrinodis. B.M. 

 Hab. ? 



