REPOET ON THE NUDIBRANCHIATA. 
47 
the lateral teeth * 25 mm., of the outermost ones ‘16 mm. The colour of the teeth within 
the radula sheath of a bright yellow, those anterior being darker in hue. The median 
plates (fig. 18, a) of the usual shape, as also the clumsy first lateral plate (fig. 18, b,b ) ; 
the rest of the teeth are somewhat low and curved towards the point (PL XII. figs. 2-5), 
most ones are more slender in form (fig. 6). 
The salivary glands are whitish in colour, and measure from 10-14 mm. in length by 
1*5-2*25 mm. in breadth. The efferent ducts are rather long. — The stomach and 
oesophagus were as usual, measuring together 13 or 14 mm. in length by 5-7 mm. in 
breadth ; the inner surface was thrown into a series of longitudinal folds ; the aperture of 
the main bile duct was large. The intestine leaves the large visceral mass at about the 
middle point; its length is about 16 or 17 mm., its diameter 3 or 3*5 mm., the inner 
surface covered with strong longitudinal folds. In both specimens the buccal cavity, 
oesophagus, and stomach were filled with a hard brown mass, consisting of the funnel- 
shaped remains of an Alcyonarian (up to a height of 5*5 mm.); 1 the intestine was mainly 
filled with the elongated spicules of the same animal. The liver (visceral mass) was 
17—1 8*5 mm. in length, by 7'5-10 mm. in breadth; the anterior end obliquely truncated, 
the posterior end rounded ; its colour was a dirty brown, darker inside than outside ; its 
cavity rather narrow. 
The 'pericardium and the heart were as usual. The renal syrinx (fig. 7, a) 1*1-1 *2 mm. 
in length, yellowish-white in colour, with a series of strong longitudinal folds in the 
inside ; the duct was greyish-brown in colour, the inner surface provided with arbores- 
cent overgrowths (fig. 7, b). 
The hermaphrodite gland forms a single mass, whitish in colour, and composed of a 
great number of lobes ; it clothes the upper and posterior portion of the large visceral 
mass ; the gonoblasts are developed in the lobes. — The anterior genital mass is elongated 
and somewhat compressed, with a length of 9-10 mm., a height of 5-6 mm., and a 
breadth of 3-4 mm. ; the efferent ducts, moreover, project for 2*5 mm. The ampulla 
of the hermaphrodite duct forms the hinder portion of the genital mass ; its colour 
is an opaque yellowish-white, its shape elongated, somewhat curved at either end, its 
length 2*2 cm., its greatest diameter 2*5 mm. The ductus ejaculatorius (PI. XI. fig. 19, aa) 
is coiled up on the inside of the penis ; when unrolled it measures nearly 2 cm. in 
length. The penis is pear-shaped and about 2 mm. long ; the glans is conical in form 
and elongated, one half of it freely projecting (fig. 19, d) ; the seminal duct runs up to the 
extremity of the organ. The spermatheca (PI. XII. fig. 8, a) is oval, 2*5 mm. long, and in 
both specimens was completely empty ; it opens by a duct (fig. 8,6), which, at its distal end, 
was dilated into an ampulla (fig. 8, c). The mucous gland was of a chalk white colour; 
the cdbuminiparous gland yellowish, with fine windings. 
1 Beitrage z. Kenntn. d. japan. Nudibr. II., Verlumdl. d. k 1c. zool.-bot. Gesellsch. Wien., Bd. xxxi. 1881, pp. 248, 249. 
