414 Cc. O. WHITMAN. 
Naples. The anus is in the 102nd annulus, nearly dividing this into two 
parts. xX 2. 
Fic. 51.—Aulostoma gulo, auct., from Sebeto River, Naples. In this 
specimen (alcoholic) the papille were very distinct, the full number appearing 
even on the 2nd annulus. x 4. 
Fig. 52.—Aulostoma gulo obtained in Leipsic. The anus is large, 
completely cutting the two small rings of the 26th somite. x 4. 
Fie. 58.—Leptostoma acranulatum, from Tokio. The 2nd annulus 
of the 28rd somite is thicker than the preceding annulus or the following, 
thus appearing to represent the two annuli fused together ; in this particular it 
agrees with Macrobdella of America. The 105th annulus is a mere rudi. 
ment, and is somewhat doubtfully regarded as belonging to the body. x 4. 
Fic. 54.—Leptostoma pigrum, from Japan, showing only five abbre- 
viated somites. The last ring (10th) of the 5th somite represents two rings 
consolidated. The first pair of nephridial pores is in the hind edge of the 
15th ring, instead of the 13th as in the Huropean Leeches. The arrange- 
ment of the stripes and spots, and the relation of the segmental papille to 
the stripes, are also shown. xX 4. 
Fig. 55.—The hind end of the same Leech, showing one full somite and 
three abridged somites behind the 17th pair of nephridial pores. The 106th 
annulus is completely cut by the anus. No marginal papille were visible, 
x 4. 
Fic. 56.—Hirudinaria’ javanica—(Hirudo javanica, Wahlberg), 
showing very large segmental papille with a definite inclination, which is 
repeated on every papillate ring. Their arrangement on the acetabulum shows 
that the eight or more somites, of which it is composed, are each represented 
by the papillate ring alone, all the non-papillate rings having been suppressed. 
The figure shows one of the ventral papille (mg'). The 102nd annulus 
forms a sort of neutral ground between the body and the acetabulum, and 
consists of two halves separated by the anus. The acetabulum is immense, 
reaching forward to the level of the last pair of nephridial pores (17th p.). x 4. 
Fie. 57.—Macrobdella sestertia, obtained from Charles River, Water- 
town, Mass., shows the dorsal surface of the first twelve somites, and the 
position occupied by the organs of the ventral surface (nephridial pores, 
genital pores, and copulatory glands) (ge.). x 4. 
Fic. 58.—Hleven rings seen from the ventral side, to show the position of 
the papille and the pores. The lateral papille (/.) are in line with the 
nephridial pores (p.). “xX 4. 
Fic. 59.—The posterior end of M. sestertia, showing an abbreviation 
similar to that seen in Fig. 53 (Leptostoma acranulatum). x 4. 
