Craspedacusta sowerbyi and Calpasoma dactyloptera — Matthews 
251 
rate of metamorphosis, I freed with dissecting 
needles a "medusa” like that indicated by A 
and brought it to the surface. It sank slowly 
without so much as a single twitch. Rather 
than medusae metamorphosing from small frus- 
tules (B, a ) these were, in reality, tentacular 
hydranths whose buds (B, a) developed ten- 
tacles and remained attached (C, b and D, c). 
Thus, stages in tentacular hydranth budding 
(Fig. 8 A, B, C, D ) are comparable to those 
figured by Bucher t (Fig. 14, row VI). It is 
some consolation now to learn that Buchert, too, 
first thought these "were larval forms out of 
which the medusa develop” (Buchert, I960: 
34). 
Thus, all of Buchert’s atentacular (type A) 
Fig. 8. Portion of E. canadensis. A, Medusa-like, tentacular hydranth; B, small, medusa-like hydranth with 
contracted tentacles and young bud ( a ); C, tentacular hydranth and bud ( h ) with four tentacles; and D, ten- 
tacular hydranth and bud (c) with eight tentacles. 
