PLATE XIX 



Fig. 1. Rathkeafor?nosissim a (Browne). Lateral view of the manubrium; 



specimen with medusa-buds, showing the relation of the 



oral arms to the mouth. 

 Fig. 2. Staiirocladia vallentini (Browne). A tentacle of a specimen 



collected in 1901. 



Figs. 3-5. Phialella falklandica Browne. 

 Fig. 3. Tentacle and basal bulb, outer (abaxial) view. 

 Fig. 4. Terminal portion of a tentacle, expanded. 

 Fig. 5. Optical section of basal bulb. 



Figs. 6-7. V allentinia falklandica Browne. 

 Fig. 6. Upper part of young specimen, lateral view. 

 Fig. 7. Young specimen, aboral view. 



Figs. 8-1 1. Tiaricodon coeruleus Browne. 

 Fig. 8. Longitudinal section of basal bulb, ex, exumbrella; oc, ocellus; 



rad.c. radial canal; v, velum. 

 Fig. 9. Transverse section of basal bulb at the level of the ocellus. 

 Fig. 10. Transverse section of basal bulb, the thickened part beyond 



the ocellus. 

 Fig. II. Transverse section of tentacle, median portion, showing 



clusters of nematocysts. 



Fig. 12. Willia mutabilis Browne. Six portions of a tentacle, from the 

 basal to the distal part, showing the clusters of nematocysts. 

 ab, abaxial side ; ad, adaxial side. 



