278 HISTORY OF BRITISH ZOOPHYTES. 
Genus IV. PUSTULIPORA, Blainviile. 
Gen. Char. Polypidom calcareous, erect ; the divisions cylin- 
drical ; polype-cells semi-immersed, arranged on all sides, tubu- 
lar, with more or less prominent apertures.—Dr. Johnston. 
1. PustuLrpora PRroposcrpEsa, Lf. Forbes. 
Hab. Zetland Seas, Prof. E. Forbes. 
“Cells nearly immersed, with everted free tubular extre- 
mities, alternate, four completing a whorl.” 
2. PusTULIPORA DEFLEXA, R. Q. Couch. 
Hab. On shells from deep water, Polperro, Mr. Couch ; 
Plymouth, Mr. Bellamy. 
From a quarter to half an inch in height. Calcareous, 
white, cylindrical. Dr. Johnston says, “Iam tempted to 
ask whether this may not be a state.of Tudulipora serpens.” 
We have not seen it. 
“ There are deep thoughts of tranquil joy 
For those who ¢hus their minds employ, 
And trace the wise design that lurks 
In holy Nature’s meanest works.” 
Genus V. ALECTO, Lamouroux. 
Gen. Char. Polypidom calcareous, creeping, adnate, irregularly 
branched, formed of horizontal tubular cells, produced in a linear 
