62 H. J, Clark.—Tubularia Not Parthenogenous. 
objective, yet it was not until 1 applied a } inch objective, of 
the same optician, that I gained a clear and unmistakable view 
comprehensible, I must prelude the description by an account of 
some other discoveries which I have made in regard to the mus- 
of contraction in these animals; and some indeed have given 
themselves up to the idea of a contraction of the individual cells _ 
of the walls, imagining themselves to be warranted in this belief 
by the Supposed example of the so-called unicellular Infusoria. 
noted thus in my journal, “March 14, 1862. Between’ the 
and tentacles, there is a layer of longitudinal fibrillated muscu- 
lar bands.— e cells of the core of the tentacles are arrang 
° 
is a layer of circular and a layer of longitudinal — 
9? * . ae ath 
bilis’ Ag.). The muscular system, of Tiaropsis, Bou sinyums 
1 Sars: y ’ psis, Seek 
STS, BOP eee kg 
Sige 
