ORDER II. — HYDROIDEA. 
145 
Isis (?) elongata (Esper). — Red, lax ramose, branches terete ; calcareous 
joints of the axis much elongate, striate ; internodes very short. 
Near Naples, Mediterranean. — Philippi. 
Genus MELIT^A.— Lamouroux. 
Isino3, consisting of an alternation of calcareous and suberose 
joints. 
1. MELiTiEA ocHRACEA. — Large, much branched, generally arboriform 
nearly in a plane ; branches and branchlets suberect, not coalescing. 
East Indies. Feejee Islands, of crimson and orange colors. — Exp. Exp. 
2. Melita:a retifera, — Flabelliform, much branched in a plane ; branches 
suberect and flexuous, branchlets often subreticulately coalescing, thickly 
verrucose. 
East Indies. — Peron Lesueur. 
3. MELiTiEA coccmEA. — Small, branching in a plane; branches slender 
(1 line thick), tortuous, divaricate, often reticulately coalescing; internodes 
obsolete, verrucaB rather remotely scattered. 
Indian Ocean. New Holland. — Exp. Exp. 
4. MelitjEa tenella (Dana). — Fruticulose, 3 inches high ; deep scarlet; 
much branched, branches and branchlets very slender, in no part a line thick, 
flexuous ; joints 3 to 8 lines long; cortex verrucose, verrucae small (i of a 
line broad), not at all ascending ; polyps bright yellow ; calcareous axis nearly 
smooth. 
Sandwich Islands. 
Order II.— HYDEOIDEA. 
Zoophytes having a simple tubular visceral cavity; ovules 
growing externally from the sides. 
Family I.— HYDRIDiE. 
Buds deciduous when mature; ovules single^ lateral; tenta- 
cles tubular. 
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