XXI LARVAL FORMS 523 
tinia, ete.), feeding as the adults do: afterwards losing these 
elongated tendrils in a moult, they pass into the gastral cavity 
of the Hydroid; in our native species the larva issues from the 
Hydroid and begins its independent life at a stage when three 
pairs of ambulatory legs are present and the fourth is in bud. 
The Phoxichilidium larvae were first noticed by Gegenbaur in 
Eudendrium, again by Allman in Coryne eximia?’ George 
Hodge made detailed and important observations, and showed, 
Fic. 281.—Larva of Phoxichilidiwm sp., showing tendril-like appendages of the 
larval palps and ovigerous legs. (After Dohrn.) 
in opposition to Gegenbaur, that it was the larva which entered 
the Hydroid and not the egg that was laid therein.’ 
Moseley has the following interesting note in his Challenger 
Report:° “The most interesting parasite observed was a form 
found in the gastric cavities of the gastrozoids of Pliobothrus 
symmetricus (West Indies, 450 f.), contained in small capsules. 
These capsules were badly preserved, but there seemed little 
1 A slightly different account is given of the Australian P. plumulariae by 
vy. Lendenfeld (Zeitschr. wiss. Zool. xxxviii., 1883, pp. 323-329). 
2 Zur Lehre vom Generationswechsel und Fortpflanzung bet Medusen und 
Polypen, 1854. 
3 Rep. Brit. Ass. 1859; cf. ‘‘Gymnoblastic Hydroids,” Ray Soc. pl. vi. fig. 6. 
4 Trans. Tyneside Field Club, v. (1862-3), 1864, pp. 124-136, pls. vi., vil. ; Ann. 
Mag. Nat. Hist. (3), ix., 1862, p. 33. 
> See also Hallez, Arch. Zool. Exp. (4), v., 1905, p. 3; Loman, Tijdschr. Ned. 
Dierk. Ver. (2), x., 1906, p. 271, ete. 
8 *©On Hydroid and other Corals,” 1881, p. 78. 
