97 
The embryonal hooks are frequently evident, commonh^ four upon the 
tail and two upon the most posterior part of the body proper (tig. 105). 
Since the tail was sometimes found branched and at other times (in 
Anisolabis) the cysticercoids were united by their tails into groups of 
3 or 1, and since occasionalh^ in Acis spiiiosa a smaller cysticercoid 
would be found attached l>y the tip of the tail to the thickest part of 
the tail of a c 3 \sticercoid of ordinary size, it seemed probable to Gi assi 
that in certain cases the c}"sticercoid of TL diminuta is capable of 
proliferation. 
Fig. 105. — View of cercocystis of H. diminuta, showing muscle fibres: catfcZ.,, caudal appendage; pr. 
cav., primary cavity; see. cav., secondary cavity. Enlarged. (After Grass! & Rovelli, 1892a, pi. 4, fig. 4. ) 
Fig. 106. — Longitudinal section through the body of a cercocystis of H. diminuta: ex. can., excretory 
canal; pr. cav., primary cavity; sec. car., secondary cavity. Enlarged. (After Grass! & Rovelli, 
1892a, pi. 4, fig. 6.) 
Fig. 107. — Longitudinal section through the body of a cercocystis of H. diminuta: ac., sucker; 
pr. cav., primary cavity; sec. cav., secondary cavity. Enlarged. (After Grass! & Rovelli, 1892a, pi. 4, 
fig. 5.) 
Cysticercoids, single or proliferated, were often found dead, having 
undergone a degeneration l)v which they became brown, and the 
details of structure indistinct. In some cases, in Acis spinosa^ the 
adventitious capsule was present and very thick: live cvsticercoids were 
found encapsulated in Anisolabis. 
In a footnote (Grassi & Kovelli, 1892a, p. 33) it is stated that more 
recently a stage in the development of the cysticercoid was found 
which showed that in IL diminuta the formation of the rostellum and 
suckers precedes the invagination as in IlymenoJejns nana. 
19203— Xo. 18—04 7 
105. 
107. 
