STRUCTURE OF THREE NEW SPECIES OF EARTHWORMS. Ill 
Typhseus Gammii, n. sp. 
The largest specimen measured about 10 inches in length 
(it is considerably contracted), and between a quarter and half 
an inch in thickness at the head end. 
External Characters. 
As in T. orientalis there is no prostomium, the mouth is 
therefore precisely terminal in position. 
The setae are disposed in pairs; the dorsal and ventral pair 
of one side are nearer together than the two ventral pairs ; the 
interval which separates the latter is about one fourth to one 
fifth of the space which lies between the dorsal pairs of setae. 
The segmentation of the body is a little difficult to make 
out, owing to the fact that there are numerous furrows in 
addition to those which mark the limits of segments. The 
accompanying drawing (PI. XII, fig. 7 ) illustrates the anterior 
segments of the body viewed from the ventral aspect. 
The peristomial segment is occupied by numerous short, 
longitudinal creases, often of a zigzag form ; these cease to 
exist some little way in front of the posterior end of the seg- 
ment ; there is, however, a fairly well-marked furrow, dividing 
this segment into two unequal halves. I am inclined to think 
that the two halves really correspond to two segments ; the 
only objection to this is that there were no setae discoverable 
upon the supposed second segment, which — at any rate in all 
other Earthworms — is the first seta-bearing segment. The 
assumption, however, that this is really a segment brings other 
organs of the body into positions more in accord with what is 
found in other Lumbricidse. It will, therefore, be assumed 
that the area occupied by the longitudinal creases equals two 
segments. 
The next two segments increase gradually in length, the 
last being marked with a faint transverse furrow. The number 
of furrows upon each of the following segments and their 
arrangement can be understood by the figure (PI. XII, fig. 7). 
The segments of the clitellum possess no secondary furrows. 
