NEW RHABDOCCELE COMMENSAL WITH MODIOLUS 383 
TABLE I 
The following notes will show further the somewhat uncertain distribution of 
this worm. 
DATE 
LOCALITY 
Vr TT V* TJ XT t> 
OF MUSSELS 
SIZE 
NO. OF PARASITES 
July 
12 
Ram Island 
50 
45-(i5 
July 
12 
Ram Island 
50 
13 
25-35 
8 
July 
15 
Ram Island 
225 
30-75 
229 
July 
16 
Ram Island 
40 
45-80 
9 large, 6 small 
July 
16 
Sheep-pen Cove 
77 
40-85 
0 
July 
20 
Noith Falmouth 
100 
35-60 
0 
July 
2;^ 
K at am a Bay 
30 
large 
0 
July 
30 
Head of Great Harbor 
86 
large 
0 
August 
4 
Robinson's Hole 
78 
55-98 
August 
5 
Ware ham 
84 
50-70 
10 
August 
7 
Ram Island 
63 
3>-68 
110 
August 10 
Ram Ishmd 
36 
55-75 
0 
August 10 
Ram Island 
24 
35-75 
75 
August 27 
Cuttyhunk 
4 
63-110 
5 
August 27 
Hadley Harbor 
79 
45-70 
0 
August 30 
Ram Island 
80 
32 -75 
204 
TABLE II 
The following tabular statement shows the results of the examination of a lot 
of 225 mussels divided according to size. 
NO. 
SIZE 
NO. OF PARASITES AND REMARKS 
25 
60-75 
45, nearly all large. 
25 
50-58 
7, large and small. 
25 
50-58 
42, large and small. 
25 
45-50 
16, large and small in about equal numbers. 
25 
40-45 
22, more small than large. 
25 
35-40 
28, mostly minute. 
25 
32-35 
30, mostly minute. 
25 
30-32 
17, all minute. 
25 
30 
22, 2 or 3 small, others minute. 
