CALIFORNIA BUDRILIDA. 15 
of the spermatheea and anterior to them. In the elitellar somites this yaseular layer 
is especially prominent. The muscles of the longitudinal muscular layer in this 
genus, as well as in Deltania, are arranged in groups or projecting lobes, between 
which pass projections of the vascular layer, as well as transverse muscles in certain 
places. These lobes vary in width, and on the ventral side below the ganglion are 
arranged fan-like (fig. 103, 7. p.), diverging from the median line. The longitudinal 
museles are never arranged around a central axis, as is the case in so many |um- 
bricides, though they show a faint trace of symmetrical arrangement. The zone of 
the transverse muscles is much thinner, five or six times narrower than the longi- 
tudinal zone (117). 
The hypodermis is thick, with large, glandular cells of a flask-like or spindle- 
like shape. In the clitellar somites these glands become irregular, club-like, and 
project as far inside the layer of clitellar glands as the hypodermis is thick, or more 
(fiz. 116). 
The clitellum is developed only dorsally. The glandular layer is much 
thicker laterally and dorsally, tapering towards the ventral side, and ceasing entirely 
at a line drawn outside of the male papilla and parallel with the ventral ganglion. 
The glandular layer of the clitellum is very thin, and as compared with that of 
Deltania, about 4 narrower. The cells of this layer are, however, very wide and 
long, there being generally eight or nine in the row. They are irregularly grouped 
in twos or threes, separated by narrow blood vessels, which, at rather regular inter- 
vals, are thicker. They are supplied with blood from sinuses situated between the 
transverse muscles, and which connect through these branches with a capillary net- 
work on the hypodermis (figs. 116 and 116). 
Transverse muscles (figs. 118 and 119). There are numerous sets of trans- 
verse muscular bands in the clitellar somites, quite similar to those described by 
3enham in Moniligaster indicus. They are more numerous and prominent in the 
somite of the oviduct than elsewhere, and form there three distinct muscular bands 
the ventral ends of which terminate at the inner couple of sete (fig. 119); the lateral 
> 
ends again terminate on the lateral side of the body wall. 
The posterior band is the smallest of the three and begins in the posterior and 
ventral part of the somite, in line with, but slightly posterior to the inner setie, stretch- 
ing from there diagonally aeross the somite, ending laterally at the seta 5 (fig. 
IS iy We 
The next band is much larger and begins in the anterior part of the somite 
also in line with the inner setie and stretches diagonally backwards ending posterior to 
but in line with seta 4 (fig. 119, m 2.) The third muscular band is of the same 
size and runs in the same general direction as the last, begins and ends in front of it, 
ending in front of the fourth seta (fig. 119, m3.) A fourth muscular band of a 
somewhat similar character connects the posterior part of the oviduct with the body- 
wall terminating in front of the muscular band just described as m 1, on the figure 
(fig. 119, m 4.) Similar muscles as the oyiducal one, are common in all earthworms, 
