NO. 10 



CRUSTACEAN METAMORPHOSES — SNODGRASS 



37 



of the animal (D, E) is somewhat deformed and the thoracic legs are 

 reduced. 



The greatest modification among the Ascothoracica occurs in the 



G 



Fig. 13. — Cirripedia: Ascothoracica. (A from Norman, 1913; B from Okada, 

 1938; C, D, E from Heegaard, 195 1 ; F, G from Knipowitsch, 1890.) 



A, Sy^iagoga mira Norman, adult. B, Synagoga melacrintcola Okada. C, 

 Ascothorax bulbosa Heegaard, shell of female with small male on top, internal 

 parasite of ophiuroid. D, same, female. E, same, male. F, Dendrogastcr asteri- 

 cola Knipowitsch, cypris larva. G, same, adult enclosed in branched mantle, 

 internal parasite of starfish. 



Dendrogasteridae, which are internal parasites of echinoderms. Den- 

 drogaster astericola, described by Knipowitsch (1890), is enclosed in 

 a voluminous mantle (fig. 13 G) with large lateral lobes, which are 

 penetrated by diverticula of the stomach. The cypris larva (F), 



