60 A FURTHER KNOWLEDGE OF THE CYSTIC CESTODES, 



The inner region of the matrix contains scattered nuclei, the 

 cell bodies of which were not distinct. Ill-defined spaces occur 

 here and there in the matrix, but the definite lacuuse figured by 

 Griesbach* for Solenophorus do not exist in this form. 



Calcareous corpuscles occur throughout the whole thickness of 

 the body tissue, but are specially aggregated in a zone situated 

 some distance below the subcuticula. 



In Cysticerci which have been stained by an acid fluid, such as 

 Ehrlich's acid haematoxylin, and afterwards treated with acid 

 alcohol, these bodies are dissolved and for the most {)art disappear. 

 Their position is, however, indicated by circular spaces (Fig. 5, 

 r. c. c.) surrounded by a wall and clearly marked oflf from the 

 surrounding matrix. 



Prof. Haswell,t in reference to the calcareous corpuscles in the 

 parasitic flat-w^orm from the frog, says : — "From their appearance 

 when acted on by dilute acid, it would appear that the two parts 

 of the corpuscle are of diflferent composition, the inner part 

 becoming, before it is entirely dissolved, converted into a cluster 

 of granules, while the outer part never becomes granular, but 

 only gradually becomes less and less distinct till a fine outline 

 alone remains." In sections treated with acid i-eagents, the 

 cluster of granules representing the inner part of the corpuscle 

 can in many cases be distinguished lying in a cavity which is 

 bounded by a wall representing the wall of the cell in which the 

 corpuscle is formed. At one point on the wall the original cell 

 nucleus can be i-ecognised. 



Immediately external to the zone containing the calcareous 

 corpuscles, in sections from Cysticerci which have been stained 

 with a neutral fluid such as cochineal, numerous round spaces can 

 be seen, containing a number of rounded or oval granules (Fig. 6, 

 c. n. c), similar in optical characters and staining properties to 



* Loc. cit. Taf. xxi. figs. 1 and 2, 

 + P.L.S.N.S.W. Vol. V. (2), p. 664. 



