Haddon and Shackleton — A Revision of the British Actinice. 629 



In the following list we have enumerated immediately after the generic 

 description all the species which can be definitely referred to any species, adding 

 in brackets [ ] the initials of the zoologists who have investigated those forms, 

 and on whose authority the generic allocations are made. The initials are as 

 follows: — A., Andres; E., Erdmann ; E. & H., Erdmann and Hertwig, for those 

 species described in the Supplement to Hertwig's " Challenger" Report, 1888, the 

 anatomical work on the Zoan these being done by Erdmann ; H., Hertwig (1882) ; 

 H. & S., Haddon and Shackleton ; M., M^Murrich. Although other zoologists 

 have made anatomical investigations on some forms, yet in no other case is 

 there sufficient information given to enable one to determine the generic position 

 of a particular species. 



In a few instances we have added those species which we think may safely be 

 regarded as probably belonging to a particular genus, e. g. Palythoa and those 

 species of Epizoanthus which form carcinsecia, owing to their having a similar 

 habit of growth to species whose genus is known. Beyond this we have not 

 dared to go, as enough confusion has been made in the group without our 

 gratuitously adding to it. 



Family. ZOANTHIDJE. 



Sub-family. Bb ach yc n em i n^. 



ZOANTHUS, Lamarck, 1801. 



Brachycnemic Zoanthe£e, with a double mesoglceal sphincter muscle. The 

 body-wall is unincrusted ; the ectoderm is usually discontinuous ; well-developed 

 ectodermal canal system in the mesogloea. Monoecious or dioecious. Polyps 

 connected by thin coenenchyme. 



EECOGNIZBD SPECIES. 



Z. sociatus (Ellis), 1767. — Dominica, Barbadoes, Guadeloupe, Bahamas, [M.]. 



Z. flos-mari^ms, Duch. & Mich., 1860. — St. Thomas, Bermudas, [M.]. 



Z. dancB ( ? ), of Hertw., 1888. — Bermudas (? if the same as .^. danai^ Le Conte, 



1851, Panama), [E. & H.]. 

 Z. eonfertus, of Hertw., 1888. — Cape of Grood Hope (?if the same as M. conferta, 



Verrill, 1868, San Salvador, Acapulco), [E. & H.]. 

 Z. coppingeri, Hadd. & Shackl., 1891. — Torres Straits, [H. & S,]. 

 Z.jiiJcesii, Hadd. & Shackl., 1891.— Torres Straits, [H. & S.]. 

 Z. macgillivrayi, Hadd. & Shackl., 1891. — Torres Straits, [H. & S.]. 

 Z. sp. (?), Hertw., 1882.— Bermudas, [H.]. 



