EXPLANATION OF PLATE YA..— continued. 

 Fig. 



28, 29. Pyxicola affinis, S. K., vol. ii. p. 727. — Expanded and contracted zooids ; op, 

 operculum, x 250. 



30,31. Pyxicola socialis, Gruber sp., vol. ii. p. 728. — 30, Social group, x 90; 31, 

 isolated zooid, X 250; ^/, operculum (Gruber). 



32, Pachytrocha cothurnoides, S. K., vol. ii. p. 729. — Extended zooid with at 

 op fleshy operculum, x 500. 



33, 34. Platycola decumbens, Ehr. sp., vol. ii. p. 731. — Dorsal and lateral aspects, 

 the lorica at 33 containing two zooids, x 280. 



35. Platycola longicollis, S. K., vol. ii. p. 732, x 300 (De Fromentel). 



36-38. Lagenophrys VAGINICOLA, Stein, vol. ii. p. 733. — 36, Two zooids attached to a 

 branched hair of Canthocamptus mmutus, x 350 ; 37, example with at 

 g posteriorly separated germ ; 38, membranous valve of oral region. 



39. Pyxicola operculigera, S. K., vol. ii. p. 725. — Extended zooid with at op 



discoidal operculum, x 250. 



40. Pyxicola Carteri, S. K., vol. ii. p. 729, x 400. — op, Operculum. 



41. Pyxicola pyxidiformis, D'Udk. sp., vol. ii. p. 726. — Extended zooid with at 



0/ lid-like operculum, x 150 (D'Udekem). 



42. Platycola striata. From., vol. ii. p. 732, x 300 (De Fromentel). 



43. Platycola dilatata, From., vol. ii. p. 731, x 300 (De Fromentel). 



44-46. Lagenophrys ampulla. Stein, vol. ii. p. 733. — 44, Extended zooid with at gg 

 detached ciliated germs, x 300 ; 45 and 46, detached germs more highly 

 magnified, showing hypotrichous plan of ciliation (Stein). 



47. Lagenophrys nassa, Stein, vol. ii. p. 733.— Retracted zooid, x 300 (Stein). 



