86 University of California Publications. | ZOOLOGY 
band, and extending back to a little behind the sixth band. Ven- 
tral limb beginning slightly behind the fourth ‘band. About 
seventy long stigmata on each side in the dorsal limb in the 
largest individuals, and about fifty in the ventral limb, but the 
number apparently varying with size and age. Esophageal 
mouth much nearer the ventral than the dorsal side of the poste- 
rior pharyngeal wall, rather large, broad elliptical, its anterior 
edge on a level with the fifth muscle band. Stomach large, irreg- 
ularly globose, in the fifth intermuscular space, its posterior end 
on a level with the sixth muscle band. Intestine compressed 
dorso-ventrally, in the form of a broad spiral of a little more 
than one turn, the axis of the spiral directed dorso-ventrad. Anus 
in the posterior half of the sixth intermuscular space. Stomach 
and the pylorie enlargement of the intestine brick red in many 
specimens, but apparently not in all. Ovary latero-ventral, 
immediately in front of seventh muscle band. Testis long, irregu- 
larly cylindrical, situated on the left side; posterior end near 
the ovary, anterior end on left side, usually in fully developed 
state slightly behind the second muscle band, but the termina- 
tion variable in position. Anterior end frequently, though not 
always, with pronounced hook. 
(b) Oozooid.—(See Figs. 27, 28, and 29 of D. ehrenbergii and 
miller, this generation, which have the essential features of the 
present species.) Body of the usual doliolum form; muscle bands 
nine, first and ninth relatively very narrow, seventh band alone 
interrupted and extending into dorsal process. Lobes of branchial 
orifice prominent, usually ten in number, occasionally eleven 
or twelve; atrial lobes very low or wholly wanting. Stigmata 
eight? (surely not more), in four pairs. Endostyle, peri- 
pharyngeal band and hypophysis as in gonozooid and phorozooid. 
Ganglion situated in fourth intermuscular space; otocyst large, 
on left side in third intermuscular space at anterior edge of third 
muscle band. 
Proliferous stolon on ventral side in fifth intermuscular 
space; dorsal process varying from short conical in small zooids 
to long and slender in large ones. Intestinal tract similar to 
that of gonozooid, excepting that the intestine proper is, as com- 
pared with the other parts of the tract, much shorter and forms 
