PLATE XIX. 



Figs. 1—1 were drawn by me from life in Ceylon, in December 1881. 



Discolabe quadrigata, n. sp. (p. 263). 



Fig. 1. The complete corm, living and floating quietly on the surface of the 

 sea. p, Pneumatophore ; n, nectophores ; q, palpons ; r, palpacles ; 

 s, siphons ; t, tentacles ; g, gonodendra, .... 



Fig. 2. Lateral view of a nectophore, from the right side, tip, Pedicle ; ex, 

 right radial canal ; cc, ring-canal, ..... 



Fig. 3. Dorsal view of a nectophore. cl, Left canal ; ex, right canal ; 

 no, ostium of the nectosac, ..... 



Fig. 4. Basal view of a nectophore, from the outside, np, Pedicle on the 

 ventral side ; cc, ring-canal, ..... 



Figs. 5-8. Different larval stages [Physomda). Compare pp. 261, 262. 



Fig. 5. A young medusiform larva, with, incipient tentacle (t). b, Umbrella (or 



bract) ; p, pneumatophore (pneumadenia of the umbrella) ; s, siphon ; 



so, mouth. 

 Fig. 6. A somewhat older larva, with sessile cnidonodes on the tentacle (t). 



Characters as in fig. 5. x, Cnidonode on the distal end of the pedicular 



canal ; 6c, bracteal canal ; q, palpons. 

 Fig. 7. An older larva, with pediculate tentilla on the tentacle (t). Characters as 



in figs. 5 and 6. 

 Fig. 8. Physonula with two opposite primary nectophores (11), similar to Dici/mba 



(PI. XVIII. fig. 1). The pedicle {am) of the single siphon (s) represents 



the trunk of the incipient polygastric conn. Characters as in figs. 5-7. 



Diam. 



