384 C. O. WHITMAN. 
Stomach plainly divided metamerically, but the chambers 
much smaller than in Hirudo. The posterior chamber pro- 
longed in two narrow lateral diverticula. 
Intestine (stomach, Gratiolet) divided anteriorly into four 
chambers, the first of which is quite as wide as the chambers 
of the stomach. 
Nephridia, seventeen pairs. First pair of pores in the hind 
edge of the 15th annulus ; the seventeenth pair on the hind edge 
of the 95th annulus. Four pairs in front of the male orifice. 
Segmental Papille.—Six dorsal and six ventral rows, as 
in H. nipponia. The papillate annuli, omitting the eye- 
bearing annuli, occur in the following order: 11th, 16th, 21st, 
26th, 31st, 36th, 41st, 46th, 51st, 56th, 61st, 66th, 71st, 
76th, 81st, 86th, 91st, 96th, 1O1st, 1O03rd, 105th (figs. 54, 55, 
Pi XX), 
The six dorsal rows are in pairs, one median pair and two 
lateral (fig. 27 d, Pl. XVIII); the ventral rows are arranged 
as shown in fig. 27 v. 
Colour.—The dorsal side is brownish olive, with fine dark 
brown stripes, along each of which are placed, at regular 
intervals, oval or quadrangular yellow spots. The median 
stripe is usually darker than the lateral stripes, and in this the 
spots are sometimes wanting or much reduced in size (fig. 
27 d). The inner lateral stripe runs midway between the 
median stripe and the margin, and the outer lateral stripe 
midway between the inner lateral stripe and the margin. In 
some cases (figs. 22, 24 d, 27 d) a shadowy stripe is seen on 
each side of the median stripe, equidistant from this and the 
inner lateral stripe; and this, in rare instances, may also be 
marked by yellow spots (fig. 24d). The margins are usually 
bright orange yellow, bordered on the inner side with a narrow 
line of dull brown, or with mere flecks of this colour. The 
marginal yellow is continued round the acetabulum and the 
head. 
The yellow spots of the median stripe become confluent 
anteriorly, forming thus an elongated patch which reaches to 
