A. E. Yerrill — Anthozoa and Ilydrozoa of the Bermudas. 567 



ff. — Column cylindrical or subclavate, with a rather stout base. 



^.—Tentacles about 50 (t. Les.) ; 56-63 (t. McMur.). Column short, nearly 

 cylindrical ; diameter in contraction, 3-4"™ ; height, 2-3.5""" (t. McMur.). 

 Disk yellowish, a green circle at base of tentacles ; tentacles light brown ; 

 mouth rosaceous (t. Les.). Test soft and smooth, but with a cuticle (t. 

 McMur.). Hermaphrodite. Z. nymphcea (Les.). 



gg. — Polyps larger ; column more elongated, cylindrical or only slightly clavate. 



h. — Tentacles small and very numerous. Diameter of column, in contraction, 

 5-6""" . disk, in expansion, 8-9'""* ; height of column, 10-12"'"' (t. fig. by D. 

 and M.). Coenenchyma thick, fleshy. Clusters rather open. 



Z. Anduzii (D. and M.). 



ft/i.— Tentacles about 60. Perfect mesenteries 26-28. Column wall thin, with a 

 cuticle below, carrying foreign matter. Diameter of column, in contrac- 

 tion, about 6""" ; of fully expanded disk, 8-10""' ; height of column, 4-30™", 

 average about 13'"". Clusters rather close. Coenenchyma thin, tough, 

 lamellar. Colors variable ; column, pale below, olive-blue above ; tentacles 

 usually dark brown, sometimes green or olive; disk usually bright green 

 with paler radial lines, sometimes pale green or yellow, sometimes a dark 

 triangular spot in line with each angle of mouth ; peristome pink, bright 

 green, or yellow. Becomes dark green in alcohol (t. Duerd.). Hemaphrodite. 

 Sphincter muscle distinct from that of Z. nymphcea (t. Duerd.). 



Z. pulchellus Duerden. 



{M. distans and M. pulchellus (both of D. and M., Supl., 1864), St. Thomas, 

 were originally too imperfectly described, and as intimated by their authors, 

 may be only varieties of Z. nymjohcea.) 



A A. — Tentacles long and slender, recurved, about 60, their length 8"", as 

 figured. Polyps large, clavate, pedunculate, 40-42"" high ; diameter of 

 column distally, in contraction, 8"" ; of expanded disk, without tenta- 

 cles, 10"". Tentacles blue. Z. nobilis D. and M. 



(This may be an Epizoanthus, which it resembles in the length and slender- 

 ness of its tentacles. Its anatomy is unknown.) 



