EXPLORATION OF ALASKA. 199 
increases in height ; then the teeth keep the same height and decrease 
again in the outer part of the rows (fig. 5); the four to six interior 
teeth are more erect, with shorter body and thinner hook (figs. 5, 6). 
The salivary glands long, thin, whitish.! The csophagus about 
6 mm. long, rather wide, with strong longitudinal folds.?, The stomach 
small, included in the liver; the biliary apertures as usual. 
The intestine issues through the liver behind the region of junc- 
tion of the first and second third of the liver; the first anteriorly pro- 
ceeding part lodged in a groove on the superior side of the liver, not 
passing beyond the anterior margin of that organ, about 2.5 mm. in 
length ; the rest of the intestine about 10.0 mm. in length; the diameter 
of the intestine 0.8-1.3 mm.; the longitudinal folds rather strong. 
The liver of yellowish color, more grayish on the surface; 9.0 mm. 
in length, by a breadth of 5 5 and a height of 4.0 mm.; the posterior 
end rounded ; more than the anterior half of the under side, especially 
its right part, is excavated (for the anterior genital mass) and behind 
this is a deep transverse groove. ‘The vesica fellea lying at the left 
side of the offshoot of the intestine, rather small, in height about 1.25 
mm., reaching nearly to the surface of the liver, nearly cylindrical. 
The heart as usual. The sanguineous glands whitish, rather 
flattened ; the anterior obliquely triangular with the point, as usual, 
adhering to the under side of the junction of the two cerebral ganglia ; 
in length 2.0 by a breadth of 1.5 mm.; the posterior transversely 
elongate-oval, with a breadth of 3.5 by a length of 1.5 mm. The 
renal syrinx melon-shaped, its largest diameter about 0.75 mm. ; its 
free duct nearly three times as long; a strong continuation of it pass- 
ing along the floor of the rather large renal chamber, to the region of 
the pylorus. 
The hermaphroditic gland spread in large groups of ramifications 
over nearly the whole liver and by its brighter yellowish color some- 
what contrasted with it; in its lobules were masses of zoisperms and 
rather small ojgene cells. The anterior genital mass* in length 5.0 by 
a breadth of 2.5 and a height of 4.0 mm.; the right side rather con- 
vex, meeting the more flattened left side at the sharp superior margin, 
1 They are in this way also mentioned by H. and E. (1. ¢., p. 215, Pl, XTi, 
fig. 2ec). 
* The dilatation on the cesophagus mentioned and figured by H. and E. 
(1. ¢., p. 215, Pl. XII, fig. 24) could not be seen in the specimen examined 
by me. 
3 Cf. the Pl. XIV, f. 9, of Hancock and Embleton. 
