366 Mr. A. Hancock on new Species 
to be larger than M. simplex, and with more extended tubes ; 
the test, too, is described as solid and thick, which is not the 
ease with our species. 
Molgula inconspicua, Alder & Hancock. 
Body globular, rather firm, covered with sand and shell, 
unattached, Apertures approximated. Test tough, clothed 
Norman in 1865. 
This rather obscure species is remarkable on account of the 
nearly linear arrangement of the branchial meshes, which, 
however, preserve sufficient curvature to bear out the character 
of the genus to which it belongs. It is nearly allied to JM. 
simplex, from which it differs in the character of the branchial 
meshes already noticed, as well as in the less bushy tentacular 
filaments and the more voluminous intestine. : 
Molgula complanata, Alder & Hancock. ; 
Body much depressed, rather longer than broad, adhering 
by its whole length, covered with sand and small fragments 
of shell. Apertures at a little distance apart; the branchial 
one towards the margin, the anal about the centre of the disk. 
Test rather thin, covered with long simple fibrils, to which 
the sand is attached; under surface very thin and smooth, 
with only a few grains of sand. Mantle transparent, slightl 
attached to the test, and with strong radiating muscles roun 
the apertures. Tentacular filaments simply pinnaté. Branchial 
sae with six folds on the right side and seven on the left; the 
meshes a good deal convoluted. Intestinal canal forming a 
single long loop, Liver pale green, folded or laminated. Re- 
productive organs composing an oblong ovate mass on each 
side; that on the right side placed immediately above the intes- 
tinal loop; the oviducts turned to the posterior side. Len 
3} tenths of an inch. : 
