245 
only one such pair. The mesenteries were in the proximal part 
of the former specimen some sixty, probably 66; the exact number 
I cannot confirm as the smallest mesenteries were very weak and 
the endoderm not well preserved. The mesenteries of the first and 
second order are provided with pennons situated in the inner part 
of the mesenteries, while the longitudinal muscles in the outer part 
were very weak. The pennons are diffuse with rather few but rami- 
ficated lamellae. In the directives the folds are higher than in the 
other mesenteries and somewhat more concentrated. The mesenteries 
of the first, second and some of the third cycles are provided with 
filaments. The parietobasilar and basilar muscles are weak. The two 
examined specimens lacked reproductive organs. 
Fam. Sagartiidae. 
Stephenson has (1920) divided the old Sagartiidae in several 
new families and expects several more. True enough we can bring 
together the genera in several groups, more or less distinet from 
each other, but I prefer, at least at present, to keep the Family Sagar¬ 
tiidae for all genera provided with acontia and basilar muscles 
which are not included in the families Diadumenidae (restr.), Aip- 
tasiidae and Phelliidae. I have namely examined several new genera, 
provided with acontia, which cannot be referred neither to the families 
proposed nor to those supposed by Stephenson. More extensive 
examinations of the anatomy of the Sagartiidae may prove, whether it 
is necessary to divide this Family any further, but in such a case I 
should think it would have to be done partly on another basis than 
that proposed by Stephenson. I especially very mueh doubt that 
the presence or absence of cinelides is of any real value as a Family 
character, although it can be used in certain cases. 
Gen. Thoe Gosse. 
Di agn osi s. Sagartiidae with broad pedal disc. Column smooth, 
not divisible in regions, without verrucae (“suckers") but with cinelides. 
Sphineter rather well developed. Tentacles rather numerous, the inner 
longer than the outer. Longitudinal muscles of tentacles and radial 
muscles of oral disc ectodermal. More than 6 pairs of mesenteries 
