FATLANATION OF THF, I'LATFS. XXV 



Fig. 20. Two of the blind extrciuities fn-m raw surface uf leg, where 



they present a clavate aifpearance. 

 Fig. 2 I. View of the extremity, showing the dark spot supposed to he 



a germinal spot. 



l'L.VTK XII. 



Fig. !). Small longitudinal portion of shell from the large claw of 

 Cancer patjunis, showing the thickness of the annulus or 

 ring in it at the point of sepaitition. 

 Fig. 12. Lou^'itudinal .section of one of the legs uf Cancer pa'/unai, 

 .showing the natural position and rehitions of the reproductive 

 organ. 

 a a. Femur. 

 b b. Iveproductive organ. 



c. Natural appearance of line of separation 



d. Coxa. 



Fig. 13. Eidarged foramen as it is seen on raw surface after the separa- 

 tion. This has been hardened in boiling water, which gives 

 it a much more defined appearance, and also enlai-ges it more 

 than it naturally should be. 



Fig. 14 Is a small portion of the femoral artery, about half-an-inch in 

 extent beyond the line of separation, which is covered as re- 

 presented l)y the pecidjir vessels. 

 a. Distal extremity of blood-vessel. 



UN THE ANATOMY AND DEVELOPMENT OF THE CYSTIC 

 ENTOZOA.— Plates VI. X. XI. XII. 



Plate X. page 476. 



Fig. 1. Magnified view of one of the young of Acejthalcicystis armatui^ 

 still attached to the germinal membrane of a secondary 

 parent. It is taken from the group shown in Fig. 2, and is 

 still in an early stixge of develoi>ment, the circlet of teeth 

 still beiiig minute and not fully developed. The absorbing 

 series of cells may be seen internally. 

 Fig. 2. Small portion of the germinal membrane of a secondary parent 



of Aciph'docystis armatiis highly magnified. 

 Fig. 3. Small p(.trtion of germinal memljrane of Acephalocystis annatus 

 in a state of degeneration ; nothing is seen in the membrane, 

 which is fpiite homogeneous, except the small cells figured a: 

 b. Is the commencement of one of the cretaceous Tiitv mass.s 

 described in the text. 

 Fig. 4. Several of the stages of development of Cysticercus. 

 (/. First stage represents s])ines ; hardly if at all seen. 

 b. Their first decided apin-arance. 

 1-. Third stage. 



