Plate 29. 



Tetrorchis erythrogaster, gen. nov., sp. nov. 

 Fig. 1. Side view of the type specimen : the color of the manubrium is taken from a sketch 



from life made on board the " Albatross." X 4. 

 Fig. 2. Side view of margin of bell, with large radial tentacle opposite the fertile radial 



canal ; (go) gonad; (en.r) endodermic root of radial tentacle ; (c.c) circular canal ; 



(v) velum. X 16. 

 Fig. 3. Base of one of the small tentacles, with rounded endodermic root (en.r). x 100. 



Aglantha digitale, var. intermedia, var. nov. 

 Fig. 4. Side view of mature specimen, 14 mm. in diameter, showing the form of the 



gonads and bell, and the muscular condition of the subumbrella. 

 Fig. 5. Oral view of the same specimen, showing the stumps of eighty-eight tentacles. 

 Fig. 6. Peduncle, showing the course of the radial canals, and manubrium with the mouth 



widely open, showing the absence of separate lips. X 10. 

 Fig. 7. Peduncle and manubrium, with mouth closed. The ridges thus formed suggest 



the presence of four long lips. X 10. 

 Fig. 8. Manubrium with lip region everted, showing the endodermic pigmentation of the 



lining of the gastric cavity. From a sketch from life, x 10. 

 Fig. 9. The youngest specimen taken, 2.5 mm. high. There is as yet no peduncle, and 



no trace of gonads. 

 Fig. 10. A somewhat older specimen, 5 mm. high, in which the peduncle is developed. 



Minute globular swellings on the radial canals near the apex of the bell cavity 



represent the earliest visible stage in the development of the sexual organs. 



