2 Mr. J. E. Duerden on 
gical Station I have been enabled to compare the Jamaican 
species with the type, B. strumosa. Histological examination 
shows the first to agree very closely with the previously 
investigated A. coste, and the two latter species confirm the 
original suggestion that the genus should be placed under the 
family Aliciide. A description of the three species studied is 
given below. 
With a few unimportant alterations the family was defined 
as follows in the paper referred to :— 
Family Aliciide. 
Hexactiniz with a large, flat, contractile base. ‘Tentacles 
simple, subulate, and entacmeous. Column with simple or 
compound hollow outgrowths or vesicles over more or less of 
its surface, arranged mostly in vertical rows. No cinclides. 
Sphincter muscle endodermal and diffuse, variable in amount 
of development. Perfect mesenteries few or numerous. No 
acontia. 
Besides the genera Alicia and Cystiactis, originally con- 
stituting the family, it is shown in a recently published paper 
by Prof. A. C. Haddon and myself (1896) that the genus 
Thaumactis, erected by Dr. G. H. Fowler (1889), is certainly 
a member of the family Aliciide, and now the previously 
doubtful genus Bunodeopsis is definitely included. The 
family thus consists of the genera Alicia, Cystiactis, Buno- 
deopsis, and Thaumactis. 
Genus AuictA, J. Y. Johnson. 
Actinia (pars), Dana, 1846. 
Alicia, J. Y. Johnson, 1861. 
Cladactis, Panceri, 1868. 
Cladactis, Vervill, 1869. 
Cladactis, Andres, 1883. 
Alicia, Haddon and Shackleton, 1893. 
Alicia, Duerden, 1895. 
Alicia, Haddon and Duerden, 1896. 
Tissues very delicate. Tentacles elongate, more or less 
retractile. Column long, beset nearly throughout with 
pedunculated or sessile, compound or simple vesicles; sphincter 
muscle feebly developed. Six pairs of perfect mesenteries, 
two pairs of which are directives. 
The definition has been slightly modified, for purposes of 
comparison with the genus Bunodeopsis, from that given in 
1895. 
