4.42 E. A. ANDREWS. 
as 96, on the left side of the animal. The dividing line be- 
tween 95 a and 95d, bifurcates to send one limb anterior to 
the enlarged region, the other posterior to it ; the former limb 
stops abruptly at the union of lateral and dorsal surfaces, and 
SO appears as a mere notch in the left edge of 95 @ as seen in 
fig. 7; the posterior limb continues as the line between 956 
and 96, fig. 7. An additional complication appears in fig. 8, 
where a small furrow, X, is seen posterior to the lateral out- 
growth; it extends only a short distance upon the ventral and 
lateral faces of the enlarged region. 
The lateral process may thus be regarded as springing from 
the enlarged left side of the spiral as it starts from 95 to run 
over to the right, the enlarged area dropping down to the left 
enough to be visible upon the ventral surface. 
The existence of this spiral makes less obvious the similarity 
of this case to the first, A; but for the spiral the lateral pro- 
cess would arise from the left side of 95 4 much as does the 
process from the right side of the ring 75 in the specimen A. 
Posterior to the ending of the spiral in the ring 97 there are six 
normal rings and a normal anal piece and anal opening (fig. 8). 
Turning near to the left termimal we observe that it has 
eight rings, the first somewhat subdivided by a short groove, 
and an anal piece that is not perforated by any anal opening. 
The colour bands and rete are evident externally. The 
absence of anal opening is found upon examination to be 
accompanied by the entire absence of any digestive tract. 
The entodermal parts of this lateral outgrowth of eight 
somites were entirely wanting. 
In a cross-section of the middle part of the process we find 
the body-wall made up of the normal epidermis, longitudinal 
and circular muscles and peritoneal lining of the body-cavity. 
The histology of these is, however, much as in a young imma- 
ture animal or as in a regenerated posterior part. There are 
dorsal and ventral setz, a ventral nerve-cord, and large nephridia 
of the type found in this species. The saccular terminal parts 
of these nephridia are, however, very much distended, so that 
the pair of nephridial sacs take up most of the space usually 
