134 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
Mean percentage of sulphur found in British coals, in the 
Admiralty inquiry under Sir H. de la Beche and Dr. Lyon 
Playfair : — 
Number of Samples. 
Kind of Coal. 
Per cenb. of Sulphur. 
37 
'Welsh 
1-42 
8 
Scotch 
1-45 
17 
Newcastle 
0-94 
8 
Derbyshire 
1 01 
28 
Lancashire 
1-42 
II. First Sketch of a Marine Invertebrate Fauna of 
the Gulf of Paria and its Neighbourhood. By 
R. J. Lechmere Guppy, F.L.S., C.M.Z.S., etc. 
Part I.— MOLLUSKA. 
The following list is only proposed as an instalment of the 
subject. It will be liable to large expansion, and doubtless 
to some revision. I have waited for years to be able to 
furnish a more complete and perfect list ; but I perceive 
that unless a beginning is made no progress can be ex- 
pected, and I prefer therefore to publish the information I 
now possess, which can be added to from time to time as 
opportunity may offer. 
All the species enumerated have been collected by myself 
either in the Gulf of Paria or on the coasts adjoining. 
Although consisting, for the most part, of names only, yet 
this list represents a very large amount of work, not only 
in collecting but in the study and identification of the shells, 
and in assigning to them their proper names, amid the heap 
ol synonymns and inaccurate determinations with which 
unfortunately the science of malacology is burdened. My 
guide as to nomenclature has been chiefly Krebs’ catalogue 
