PLATE VIII. 



AMMOCONIDiE. 



Figs. lA-lC. Ammolynthus prototypus, u. sp. (p. 27). 



Fig. 1A. A complete specimen, exhibiting the pores (£>) in the thin wall of 

 the urn-shaped body. The greatest part of the wall is composed 

 of various Radiolarian shells cemented together by a scanty 

 maltha. The simple gastral cavity opens above by a 

 cylindrical osculum (o), ...... 



Fig. IB. Transverse section through the basal portion of the body (semi- 

 diagrammatic), r, Radiolarian shells ; m, maltha of the meso- 

 derm ; e, eggs ; v, germinal vesicle ; n, remnants of the flagello- 

 epithelium ; p, pores, ...... 



Fig. lC. A small piece of the body-wall, seen from the inside. In the clear 

 maltha (m) between the Radiolarian shells are visible single eggs 

 (e) and amoeboidal wandering cells (a); some pieces of the ento- 

 dermal flagellated epithelium («) are visible ; p, pores, 



Diam. 



50 



200 



150 



Fig. 2. Ammolynthus haliphysema, n. sp. (p. 28). 

 Fig. 2. o, osculum; p, pores; x, xenophya (Globigerina ooze), 



Fig. 3. Ammosolenia rhizammina, n. sp. (p. 29). 

 Fig. 3. A small corm, composed of eight persons, 



Fig. 4. Ammoconia auloplegma, n. sp. (p. 31). 



Fig. 4. Transverse section through a cylindrical branch of the reticular sponge 

 (semi-diagrammatic) ; n, flagello-epithelium ; m, maltha ; x, 

 xenophya (Foraminifera shells) ; p, pores, . . . x 



50 



Figs. 5A, 5B. Ammoconia sagenella, n. sp. (p. 31). 



Fig. 5A. The reticular body of the sponge, composed of anastomosing cylin- 

 drical tubes, . . . . . . . x 4 



Fig. 5B. A small portion of the porous wall of a cylindrical tube, seen from 



the inside, x, xenophya ; p, dermal pores, . . x 200 



