130 CALIFORNIA ACADEMY OF SCIENCES. 
duets of which finally united into one. In Benhamia I could see no such union, and 
the single ducts could be followed with great facility to the outlets. Fig. 17 repre- 
sents some of these cells with three narrow ducts and secreted matter. 
(Hsophagus, following pharyngeal division, is very long. The upper part, im- 
mediately below the pharyngeal gland, is very thin-walled, consisting of only one 
strand each of transverse and longitudinal muscles, and lined by a very narrow epi- 
thelium (fig. 19). Posteriorly the walls of the cesophagus thicken considerably. The 
two distinet gizzards are in viii and ix, as usually connected by a very thin wall of 
the same general nature as cesophagus (fig. 7). The muscles of the gizzards are 
columnar but not bipinnately arranged, the ribbons running parallel with the short 
diameter of the body (figs. 7 and 21). 
The tubular intestine extends through somites x to xiv, being of irregular out- 
line. Sacculated intestine commences in xy, and is furnished with a typhlosole in 
somites xviii to xxiii, or thereabout. 
Epithelial cells of the alimentary canal surround glands of various forms. In 
the epithelial lining of the gizzard we find club-like glands (fig. 21 g/.) consisting 
each of one (seldom of more) large cell with round nucleus, a narrow duct reaching 
between the epithelial cells, and ending witha large chamber, in very much the same 
way as the pharyngeal and septal glands. 
In the narrow thin walled part between the two gizzards I find a few clusters 
of glands (?) similar to those I have described in Argilophilus. At the bottom of the 
cluster we find a glandular cell, upon which are butting the peculiar lunate cells, 
which again surround a lumen, which is much wider than in the corresponding organ 
in Argilophilus (fig. 22 g/, and c.) The lining of the sacculated intestine and the 
typhlosole are composed of three distinct kinds of cells, two of which are glandular 
(figs. 24 and 25.) The common epithelial cells offer nothing of particular interest. 
The glandular cells are of two distinet kinds (fig. 25). One kind is the one most 
common in oligocheeta (fig. 25 g/.) and its enclosed granules are much smaller. The 
other kind is probably identical with the T-shaped cells described by Benham in 
Eminiodrilus, though the T-shaped form is not quite so prominent. The granulation 
is coarse and highly refractive and the distal part of the cell stains intensely, especially 
with methyl green. The other or first mentioned glands remain at the same time un- 
affected by this stain. These dark staining cells are much less numerous than the 
other kind, and are scattered about in a rather regular way. Fig. 24 4 represents 
one of the lobes of the typhlosole, showing the absence of glands at the apex as well 
as the general distribution of the dark staining cells. 
Calciferous diverticula. I found in the two specimens dissected and sectioned 
ouly two pairs of calciferous glands in somites xv and xvi, but [ am unable to say if 
this will be found constant, as all other species of Benhamia possess three pairs 
of calciferous pockets, which Beddard claims are characteristic of this genus. 
Michaelsen’s observation that the two diverticula are of different nature is confirmed 
here, as in the posterior pair no lime crystals were found, either in this or in the other 
species described below. Also the histological structure of the posterior and anterior 
