62 H. B. FANTHAM. 
by a fold or “ typhlosole” from that part of the intestine 
serving for the passage of the gut-contents, as described by 
Perrin (6) and Mitra (28) respectively. No useful purpose 
would be served by my merely reiterating their correct de- 
scriptions. However, I found that sometimes in the case of 
Anodon, when the style was seemingly absent, it was really 
far back near the posterior end of the cecal compartment— 
this was the case in mussels that had not been feeding 
recently. This may be explained by the anterior part of the 
style having been used, or by the style during periods of 
starvation being pushed back into this hinder region of the 
cxcal compartment. The whole alimentary canal is lined by - 
cilia, the movements of which might aid in the process. The 
yellow, colloidal, cuticular lining of the anterior part of the 
czcum in such starving mussels was not found to contain 
Spirochetes. I always found the crystalline style to be clear 
and hyaline, though under the microscope its outer, denser 
layer was striated longitudinally, while its inner zone was 
more fluid. 
Crystalline styles were found in fresh water mussels opened 
at all times, whether after feeding or not, as maintained by 
Latter (27). 
Unfortunately I had not enough material to conduct a 
detailed chemical examination for the metals and acid-radicals 
likely to occur in the style, but by means of flame-tests it 
was found that calcium was present, imparting a yellowish- 
red coloration to the flame, and also potassium, giving a lilac 
or delicate violet flame-coloration. 
In the case of infected oysters the crystalline style often 
was not present, but the gut contents of the cecal region 
invariably dried or “ separated out” in tree-like patterns. 
This was also the case in styles from mussels placed on a 
elide and dissolved in a little water, for this solution also 
“separated out” on drying in similar patterns. 
The Spirocheetes described in this paper live, hen, in a 
globulin-containing medium in which is an amylolytic fer- 
ment. 
