426 



MOLLUSCOIDEA 



not, however, the only manner of reproduction. From time to time, without any 

 interruption" in the lateral budding, fertilised eggs ascend from the ovary towards- 

 the tentacle-disc, and develop into larvae which in no way resemble Loxosoma 



A FIXED MOSS- ANIMAL (Loxosoma) WITH LATERAL BUDS ( x200). a, Stock ; b, Swarm-larva ( x 100). 



They have flat, almost shield-shaped bodies, surrounded by a ciliated margin. 

 After breaking Out through the disc of the mother, at the stage represented in the 

 illustration, they pass through various changes before reaching the adult form. 



