The characteristics of the genus Cranosina are discussed and a new spe
cies, C. spiralis, which apparently has free-living, lunulitiform colo
nies with a spiral budding pattern, is introduced. The role of the bas
al coelom in some free-living species is briefly discussed. The name C
opidozoum declinatum nom. n. is introduced for C. transversum, Hayward
& Cook, not Silen.