236 SCIENTIFIC RESULTS OF THE 
ated. In the skin a rather large quantity of spicula. The broad 
centres of the warts of the back chalk-white in transverse section, on 
account of the mass of strong spicula which ascend in bundles through 
the axes of the warts, their peripheral parts being free from spicula. 
The spicula, for the most part, staff-shaped or cruciate, reaching a 
diameter of about 0.08 mm.; small and large rounded ones were 
also very common ; the spicula mostly very strongly calcified. In the 
interstitial tissue calcified cells were seen scantily. 
The mouth-tube was 1.5 mm. long; the bulbus pharyngeus about 
1.5 mm. long, the sheath of the radula projecting about 075 mm., 
bent upwards ; the sucking-crop nearly as large as the proper bulbus, 
short-stalked. The lip-disk with the cuticula rather thick, especially 
at the inferior median line, here sometimes prominent and reminding 
one of the two blades in the Acanthodorides. The tongue (in the six 
individuals examined) with seven to nine rows of teeth; further back- 
wards twenty-nine, thirty-one, or thirty-four (in three individuals) 
developed, and three younger rows; the total number of rows was 
thus forty-two to forty-six. The median plates (fig. 8a) and the large 
lateral (fig. Gaa, 7, 8b) ones quite as in the Ad. Pac jica, also the ex- 
ternal ones (fig. 66, 8c), but the number of those never surpassed ten 
or iwelve ;! frequently all gone from the tongue, and only existing in 
the two to four posterior rows; the height of the large lateral plates 
rising to about 0.09 mm. 
The salivary glands, as usual, white. The oesophagus somewhat 
wider in its first part; the stomach as usual; the liver of usual form, 
its substance of yellow color; on the first quarter of the right side an 
impression for the anterior genital mass. The vesica fellea rather 
smaller, on the right side of and a little behind the pyloric part of the 
intestine, with its upper end appearing on the surface of the liver ; 
the duct nearly as long as the bag, opening in the stomach. 
The sanguineous gland of subquadratic form, the largest diameter 
about 2.3 mm., very much flattened, whitish. The tube on the floor 
of the renal chamber rather strong. 
The hermaphroditic gland clothing the liver with a thin, whitish- 
gray layer. The anterior genital mass small, nearly undeveloped, 
much compressed, of about 1.75 mm. in length, the height a little less. 
The ampulla of the hermaphroditie gland thin, otherwise as usual, 
1 According to Friele and Hansen (I. c. p. 8) the number of external 
plates istwelve ; the figure of these authors (Tab. II, fig. 1) is rather bad. 
G. O. Sars has eleven to twelve external plates in his figure. 
