250 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
as possible to the pages where the descriptions occur, or 
as small groups of cuts (as in ‘‘Gosse’’) in the text. 
There would be a figure of the whole animal in each 
important genus; or small family, and the figures of the 
species would represent the diagnostic points only, e.g. 
in the zoophytes there would be a figure in the genus 
Plumularia of an entire colony, or shoot, while the 
species pinnata, setacea, catharina, &c., would be repre- 
sented each by a small figure showing the pinne, calycles, 
or nematophores as the case required. 
I shall now give a few examples, taken from different 
groups, of the method in which the genera and species 
might be treated, in order that specialists may have the 
opportunity of judging and criticizing. 
I. From Ccelenterata :—Genus ANTENNULARIA, Lamk. 
Stems simple or branched; pinne verticillate ; 
nematophores along the stem; gonothece ax- 
illary, unilateral. 
A. antennina, L., stems clustered, usually simple; 
hydrothece separated by 2 joints. 6 to 9 in. high. 
Gen. distr. deep w. 
A. ramosa, Lamk., stems single, usually branched ; 
hydrothece separated by 1 joint only. 6 to 9 in. 
high. Gen. distr. deep w. 
II. From Crustacea :—Family Mapz. 
Hyas, Leach. Carapace tuberculous, no spines; bran- 
ches of rostrum not divaricated; second joint of 
antenna dilated; no teeth beneath last jt. of 
walking legs. 
H. araneus, i., carapace not contracted behind post- 
orbital process. 38in. Common, shallow. 
H. coarctatus, Leach, carapace contracted behind 
postorbital process. lin. Gen. distyr., shallow. 
Pisa, Leach. Carapace may be tuberculous, with strong 
