The female produces progeny at five-year intervals, never more than two at a time.

They are monogamous, like certain of our own _Ranidae_.

Pending my monograph upon what little I had time to learn of their interesting habits and customs, the curious will find instruction and entertainment in Brandes and Schvenichen's _Brutpfleige der Schwanzlosen Bat rachier_, p.

395; and Lilian V.Sampson's _Unusual Modes of Breeding among Anura_, Amer.Nat.xxxiv., 1900 .-- W.

T.G.
[2] The _Yekta_ of the Crimson Sea, are as extraordinary developments of hydroid forms as the giant _Medusae_, of which, of course, they are not too remote cousins.