No.1.] BUDDING IN GOODSIRIA AND PEROPHORA. 153 
of test and rather close together. Size of zooids, length 3 to 5 
mm., width 2 to 3 mm. 
Test. Rather dense, opaque, cells small and not numerous, 
no bladder cells, slightly fibrillated. Vessels numerous, much 
branched and anastamosing, terminating, particularly in mar- 
gins of colony, in many large pear-shaped ampullae; mostly 
occupying a deeper position in test than the zooids. 
Musculature. Not highly developed, fibres not arranged in 
distinct bands. 
Lranchtal Apparatus. Position of branchial and atrial orifices 
vary with the character of the colony; when the colony is thin 
and encrusting they are both placed more dorsally, 2.2. opposite 
the endostyle; when the colony is fleshy and massive, the 
orifices are more anterior and nearer together. No distinct 
siphons; orifices not lobed, at least not discoverably so in 
preserved specimens; in some specimens orifices obscurely 
quadrilateral. 
Branchial tentacles simple, usually twenty long and strong 
ones, and about same number of smaller ones alternating with 
them. Atrial tentacles present, about twenty in number, 
much smaller than the branchial. Branchial sac without folds; 
internal longitudinal vessels rather prominent, 5 on each side, 
the two dorsal ones on each side nearer together than the 
others. Small intermediate transverse vessels frequently pres- 
ent. About 12 series of stigmata; 5 or 6 stigmata between 
each two longitudinal vessels excepting between the two on 
each side which are closer together, where there are only two 
or three. Dorsal lamina a plane membrane tending to roll up. 
Endocarps. Present in the form of large globular structures 
attached to the parietal wall of the peribranchial sac, from 
which they project prominently into the peribranchial space. 
Digestive Tract. Situated on left side of branchial sac, 
distinctly divided into oesophagus, stomach, and intestine. 
Oesophagus nearly as broad as intestine, and approaching the 
stomach in length. Stomach somewhat pear-shaped, about 
8 deep folds extending lengthwise of the organ, parallel with 
one another, not converging toward the point of entrance of 
the oesophagus. Course of intestine, first ventralward from 
