126 



VARIOUS FORMS OF SPAWN 



chinensis hatches her eggs by keeping them between her foot 

 and the stone she adheres to. They are laid in from 6 to 10 

 capsules, connected by a pedicle and arranged like the petals 



Fig. 40. — Egg-capsules of, A, Wassa 

 reticulata L. x |; B, Buccinum 

 undatum L. x | ; C, Neptunea 

 antiqua L. x 5. 



Fig. 41. — Spawn of a species of 

 Natica (from a specimen in the 

 British Museum) x h 



of a rose, with 10 to 12 eggs in each capsule. Those Littorina 

 which are not ovoviviparous deposit their spawn on sea-weeds, 

 rocks, and stones. The eggs are enveloped in a glairy mass 

 which is just firm enough to retain its shape in the water; each 



Fig. 42. — lanthina fragilis Lam. PL, float ; 0, ova ; Pr, proboscis ; Br, branchiae ; 

 P, foot. (Quoy and Gaimard.) 



eg^ has its own globule of jelly and is separated from the others 

 by a very thin transparent membrane.^ 



Chiton marginatus^ when kept in captivity, has been noticed ^ 



1 Jeffreys, Brit. Conch, iii. p. 355. 



^ W. Clark, Mag. Nat. Hist. xvi. p. 400. 



