1891-92.] A. B. Griffiths on the Blood of the Invertelmta. 127 
The Blood of Molluscs. 
The blood of the majority of the Lamellihranchiata is more of 
the nature of a hydrolymph than that of a hsemolymph, although 
there are several exceptionSc For instance, the blood of Pinna, 
Mytilus, and Anodonta is a true hsemolymph. 
The percentages of saline matter contained in the blood of 
certain Lamellibranchs have been ascertained to be as follows : — 
I. 
II. 
III. 
IV. 
Average. 
Mya, .... 
0-921 
0-963 
1-021 
0-987 
0-973 
Solen, .... 
0'987 
0-989 
1-000 
1-032 
1-902 
Pecten, 
1 -003 
0-998 
0-989 
1-006 
0-999 
Lima, 
0-986 
0-989 
0-992 
0-995 
0-990 
The ashes of the blood of these animals yielded the following 
results on analysis (averages of two analyses in each case) : — 
Mya. 
Solen. 
Pecten. 
Lima. 
Copper oxide, 
trace. 
trace. 
trace. 
Iron oxide (FegOg), . 
0-20 
trace. 
Lime (CaO), 
3-59 
3-46 
3-70 
3-58 
Magnesia (MgO), 
1-86 
1-79 
1-80 
1-85 
Potash (KgO), . 
4-89 
4-90 
4-87 
4-90 
Soda (Na 20 ), . 
44-20 
44-03 
44-11 
44-08 
Phosphorie acid (PgOg), . 
4-89 
4-80 
4-76 
4-83 
Sulphuric acid (SO 3 ), 
2-75 
2-73 
2-80 
2-77 
Chlorine, 
37-82 
38-09 
37-96 
37-99 
100-00 
100-00 
100-00 
100-00 
The next table represents the complete analysis of the blood of 
these Lamellibranchs : — 
Mya. 
Solen. 
Pecten. 
Lima. 
Water, .... 
98-356 
98-250 
98-270 
98-27 S 
Solids, .... 
1-644 
1-750 
1-730 
1-727 
r Fibrin, 
0-036 
0-040 
0-038 
0-035 
\ Albumin, . 
0-621 
0-721 
0-689 
0-700 
V Salts, 
0-987 
0-989 
1-003 
0-992 
