284 



2. IsiDELLA ? CORALLOIDES. 



Isis coralloides, Lamx. 

 South Sea. 



3. Mopsea. 

 Mopsea, Lamx. 



Coral branched, fan-shaped, branches pinnate. Axis jointed, 

 stony joint short, branches from the horny articulation. Bark hard, 

 with imbedded spicula ; polypiferous cells produced, wart-like, sub- 

 verticillate, ascending, rather incurved. 



1. Mopsea encrinula. 



Isis encrinula, Lamk. 



Mopsea verticillata, Lamx. Pol. Flex. t. 18. f. 2. 



M. encrinula, Ehrenb. 



Australia. 



Fam. 3. MELlTiEADjE. 



Coral branched, branches furcate, often anastomosing. Axis 

 spongy, permeated with flexuous cylindrical canals, continued or in- 

 terrupted with harder swollen calcareous joints. Bark granular, 

 almost entirely composed of transparent calcareous spicula. Polypi- 

 ferous cells in series on the edge of the stem and branches. 



1. SOLANDERIA. 



Solanderia, Duchassaing. 



" Axis continued, resembling the non-calcified joints of Melitea." 

 Bark thin, rather cottony. 



1.' Solanderia gracilis. 



Solanderia gracilis, Duchass. Rev. Zool. 1846, 218. 

 Guadaloupe. 



2. Mopsella. 



Axis articulated, segments elongated, stony, with short swollen 

 hard and porous joints. Base of the axis expanded, not lobed. 

 Bark permanent, granular with scattered spicula, cells prominent, 

 swollen. 



1. M. DICHOTOMA. B.M. 



Isis dichotoma, Pallas ; Esper, t. 5, t. 11. with bark (Petiver, Ga- 

 zoph. t. 3. f. 10) ; Hermann, Naturf. xv. 135. t. 5. f. 1. 

 Mopsea dichotoma, Lamx. 466 (not Seba, t. 106. f. 4). 



3. MelitjEA. 



Coral branched, furcate, often anastomosing. Axis composed of 

 narrow, solid, striated, calcareous segments and swollen spongy 

 grooved joints ; base of the axis expanded, not lobed. Polypes in 



