EXPLANATION OF PLATE XL. 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 ; op, 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 minutus, 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 



op 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). 



