,l.\ 



• tin n i . i •_; u 1 1 \ in well as the whole back, fine spicules; the margin 



with quite small tubercles, which is also the case with the 



The strong club of the rhinophoria appeared to contain 



es, tri pinnate; almost in the middle of tin the but little 



nind. Th the not verj broad mantle-edge showed oblique 



. from without The genital papilla had two openings. The 



ml on each side of it was found the short, truncate tentacle. The foot was anteri- 



ith a marginal furrow, the foot-brim narrow; the tail rather short, rounded at the end 



nervou > m (fig. 171 showed the cerebral and pleural ganglia to be 



ned, almost of the same size, roundish; the pleural ones situated (fig. 17 Kin outside the 



The pedal ganglia (fig. 17 cc) were lying behind the former pair, also of a roundish 



rebral ones, and connected by a rather short commissure The bulb- 



rimal olfactorj ganglia were almost sessile (fig. 17); the roundish buccal ganglia were 



connected with each othei bj a not quite short commissure. 



Tin- black 1 j. 171 were quite short-stalked. The otocysts (fig. 17, t8) were lying on 



the uppermost edge of the pedal ganglia, measured in diameter o-io' nm , and contained a rather great 

 numbei of round and oval, firm otoconia of a diameter of 0-007 — 0-013"" (Fig. t8). The leaves of the 

 club of the rhinophore, as well as its axis and the stalk contained numerous spicules exactly of 

 the same kind as those found everywhere in the skin, especially in large numbers in the back with 

 and in the lower side of the mantle-brim. These spicules arc long, staff-shaped, cylindrical, 

 ere and there also a little rugged, straight <>r slightly bent, strongly calcified, clear as glass, and 

 : up to o-03' nm ; they are, as is usual with this kind of spicules upon the whole, easily 

 u, and were often found broken into many piei 

 The short and powerful bulbus pharyngeus together with the thick, strongly projecting 

 radula-sheath measured in length ->'""'; the labial disk was covered with a simple, colourless cuticle. 

 le was broad and flat, and appeared to contain 25 rows of teeth, of which the foremost 

 ry incomplete, and the tooth-plates to a great extent broken; farther back in the radula-sheath 

 med to lie found, of which the hindmost were not yet completely developed; thus the 

 number of the rows seemed to be 51. The odontogenous cells of the radula-pulp were arranged 

 in 1' rming the long tooth-plates. The number of tooth-plates in the series was con- 



it could not he made out. The tooth-plates were completely colourless; the outermost were 

 _\ while the largest were at least - 35 mm . The tooth-plates were of the peculiar, before 

 -. long, flattened, and thin, at the point a little broader (measuring 0-013"""), formed 

 n, in the point and in part of one edge provided with quite fine and pointed denticles 

 the outerm h-plates were less long and denticulated lor a longer way (fig. 



whitish salivarj glands v. small mass on each side of the lore end of 



short; the stomach oblong, of about the same length as the bulbus 



• lii.il mass was a little oblong, rather large. The glans penis (fig. 2\) 



