LARVAL FORMS 523 



tin in, 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. 1 

 The Phoxichilidium larvae were first noticed by Gegenbaur in 

 Eudendrium? again by Allman in Coryne eximia? George 

 Hodge made detailed and important observations, 4 and showed, 



FlG. 281. Larva of Phoxichilidium 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. 5 



Moseley has the following interesting note in his Challenger 

 Eeport : 6 " The most interesting parasite observed was a form 

 found in the gastric cavities of the gastrozoids of Pliolothrus 

 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. plum/ulttriae l>y 

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



- Zur Lehre vom Gencrationswechsel und Fortpflanzunrj lei Medium und 

 Polypen, 1854. 



3 Rep. Brit. Ass. 1859; cf. " Gymnoblastic Hydroids," Ray Soc. pi. vi. fig. 6. 



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

 Ma<f. Nat. Hist. (3), ix., 1862, p. 33. 



5 See also Hallez, Arch. Zool. Exp. (4), v., 1905, p. 3 ; Loniaii, Tijdschr. Ned. 

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



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



