LARVAL FORMS 



523 



ttnia, etc.), 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 Phoxicliilidium larvae were first noticed, by Gegenbaur in 

 Eudendrium^ again by AUman in Goryiie eximia? George 

 Hodge made detailed and important observations,* and showed, 



Fig. 281. 



-Larva of Phoxichilidiifm .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 Plioliotlirus 

 symmetricus (West Indies, 450 f.), contained in small capsules. 

 These capsules were badly preserved, but there seemed little 



' A slightly different account is given of the Australian P. plunmlariae by 

 V. Lendenfeld (Zeitschr. wiss. Zool. xxxviii., 1883, pp. 323-329). 



- Ziir Lehre vom GenerationsioccJtsel mid Fortpflanzung liei Mcdusen uiid 

 Polypen, 1854. 



^ Jiep. Brit. Ass. 1859 ; cf. " Gymnoblastic Hydvoids," liaij Soc. pi. vi. fig. 6. 



' Trans. Tyneside Field Club, v. (1862-3), 1864, pp. 124-136, pis. vi., vii. ; Ann. 

 Miiff. Nat. Eist. (3), ix., 1862, p. 33. 



'- See also Hallez, Arch. Zool. Exp. (4), v., 1905, p. 3 ; Lonian, Tijdsclir. Ned. 

 Dierk. Ver. (2), x., 1906, p. 271, etc. 



6 "On Hydroid and other Corals," 1881, p. 78. 



