ODA 



tin up] the lowi i themselves seemed to send off nerves, but 



it least . from the indentation 



•in the hindmost part of the lower side of the commissure 



Tin- pleural ganglia were almost but half the size of the 



ival conl ib ; thej sent off four thicker and a pair of quite thin 



anglia (fig. 2cc that were connected, as it win.-. by a stalk with the 



than the pleural; they sent off four strong nerves, one from the lower side. 



immon commissure (i ug), as usual double (fig. 2d). The cerebro-buccal connective is 



mmissure; the 1hk-c.i1 ganglia (fig. 2eei were of an ovally roundish shape 



with a dian nd sent off five nerves; the rather strong buccal commissure (fig. 21) was 



The nerve cells (of the pleural ganglia) were of a diameter of at least o - 30 mm ; the nerves 



re in their proximal part often a little reddish. In the skin was seen a rather rich network ol 



.ml small ganglia, sending off branches to the small papillae of the skin 1 ). 



In spite ol .1 careful examination I did no mure in this individual than in the earlier examined 



mil I in Ending eyes and otocysts, which nevertheless surely are not wanting 2 ). The strongly 



hinophores showed along the lore and hinder surface a strong median (transverselj folded) 



rlia. id and upwards tapering, from which arise lamellae without spicules; the point 



he club is tunned bj a little final papilla. Through a special cavity two strong nerves ascended, 



mg and anastomosing muscular strings stretched through these organs. The -mall, 



• if the skin were slightly depressed, with a projecting edge, and in the middle was often 



- ontracted papula (pi. I, Kg. 3). X" spicules or calcified elements were found in 



tlie skin at all. 



The mouth-tube of this individual was quite short, the bulbus pharyngeus being projected, 



that tlie bluish labial disk was lying in the outer mouth; the labial disk was short-oval, longer 



in the direction from above downwards, its diameter was 1 _>""", in the middle was seen the narrow, 



icular aperture of the inner mouth (pi. I, Kg. 2). The exceedingly powerful bulbus pharyn- 



pl. I, Bg.4; pi. II, fig. ib) was of a whitish colour; only in the region of the pharynx the 



underlying colour shone through with a bluish tint; the bulb was vj : " long by a breadth of y?'" and 



a height idula sheath projecting in a semiglobular form posteriorly mi the lower surface 



had at it- base a diameter of 13""". The rather Strong Mm. bulbo-tubales (Protrusores 



bulbil were as ha- shown before |. The bulbus pharyngeus (fig. p is by a rather sharp crest 



margin of the mandibles), only interrupted on the lower surface, divided into a smaller and nar- 



rmer part, and a rather larger hinder part; on the sides behind the mentioned crest the latter 



•rlv passing evenly into the common prominences produced by the tongue- 



the pharynx The upper side of the bulbus pharyngeus (fig. n is strongly 



2. pi XIV 



P/euroloma, obtained .11 .1 depth of 2090 faths, in a Fit sax from a depth ol 

 and iu other mollusks; the preseno in animals from tl 



ighl , not be incomprehensible. < >n the other hand .1 rather large number 

 1 number oi abyssal Crustacea without eyes have been found. Com].. Semper, 

 ■ ■ 



