EXPLANATION OF PLATE XLVL (co>iti:nicJ). 

 Fig. 

 40-43. AciNETA MYSTACINA, Ehr., vol. ii. p. 834.— 40 and 41, Long and short pcdicled 

 varieties, the former with, at a, a germinal bud x 150 ; 42, lorica with 

 contained animalcule seen from above ; 43, a germinal bud with contained 

 ciliated embryo further enlarged. . 



44. ACINETA NOTONECTiE, C. & L., vol. ii. p. 833, X 150 (Clap. & Lach.). 



45-47. AciNETA PATULA, C. & L., vol. ii. p. 835.-45 and 46, Animalcules with tentacles 

 extended and contracted, x 100; 47, example with elongate lorica giving 

 birth to a ciliated embryo (Clap. & Lach.). 



48-51. Hemiophrya GEMMIpara, Hertwig sp., vol. ii. p. 823. — 48, Distal extremity of 

 pedicle bearing animalcule with extended tentacles of two orders, suctorial 

 and prehensile, x 150; 49, prehensile rib tentacles more highly magnified, 

 showing spirally disposed granular external sheath ; 50, example with six 

 terminal buds, into each of which is produced a prolongation of the 

 branching endoplast, the tentacles not represented ; 51, an hypotrichously 

 ciliated embryo, x 400 (Hertwig). 



52. Solenophrya crassa, C. & L., vol ii. p. 82S, x 150 (Clap. & Lach.). 



53-56. PoDOPHRYA MOLLIS, S. K., voL ii. p. 821. — 53 and 54, Adult animalcules, x 150; 

 55 and 56, successive phases of transverse fission of the same zooid, first mani- 

 fested by the extension and fixture of two ordinary suctorial tentacles to a 

 more remote point, these two ultimately fusing together and joining the 

 pedicle of the newly produced animalcule. 



57. ACINETA MYSTACINA, vol. ii. p. 834.— Ciliated embryo, x 300 (Stein). 



58, 59. PODOPHRYA Steinii, C. & L.,vol. ii. p. 815.— 58, Adult zooid, X i5o(Stein) ; 59, 

 ciliated embr>'o, x 300 (Stein). 



