312 PEOPESSOR E. BAY LANKESTER. 



which one is strougly magnified below (woodcut^ fig. 1, b). Mouth 

 with six suckerSj two teeth, and radula; the latter, as far as I 

 could make it out without injury to the animal, is drawn 

 below to the right hand side (woodcut, fig. 1, c). The mouth 

 leads into an oesophagus ; this into a muscular stomach, in the 

 muscular wall of which is a unicellular gland a la nematode. 

 Sharply defined intestine which I could not follow out to the 

 anus on the process to the right (woodcut, fig. 1,/). Ganglion 

 superius sends out the nerves to the eyes ; between it and the 

 ganglion iuferius are the two otolithic vesicles. On the right 

 side the generative gland is seen with reddish oil specks, and 

 in the corner black pigment; to the left is a cellular body, 

 probably an excretory organ. Subsequently it seemed to me 

 as though there were a calamus in the hindermost portion of 

 the animal ; this must, however, have been a mistake. Heart 

 not seen." 



It is obvious from the above notes that Suhm had not com- 

 pleted his examination of this interesting organism. The three 

 specimens, of M'hich only two are in such a state as to be useful 

 for examination, have been carefully studied by me, and from 

 these and the information afforded by Suhm, I have constructed 

 a second figure (woodcut, fig. 2), which is placed by the side of 

 Suhm's original drawing. Suhm^s drawing being made from 

 fresh specimens affords evidence of various interesting details, 

 and I have thought it right therefore to reproduce it intact. 

 The preserved specimens studied by me are also much older than 

 that drawn by Suhm, which is apparently the one which has 

 completely decomposed. This specimen is half the length of the 

 other two, and whilst it, as shown in Suhm's drawing, possessed 

 suckers both on the long arms and near the mouth, no suckers 

 at all are present in the larger examples. They may possibly 

 have been rubbed off by rough usage of the specimens, but I 

 incline to believe that they are naturally absent in the 

 later stage, though present in the youngest stage as 

 drawn by Suhm. Probably owing to its firm contraction in the 

 living condition, the mantle-flap escaped altogether the observa- 

 tion of Suhm^ and this led him to the notion that the animal 



