50 -LAND PLANAEIANS FROM LORD HOWE ISLAND. 



Description of Plates. 



Plate V. 



Fig. 1. — Cotyloplana whiteleggei, dorsal view, x 3. 



Fig. 2. — Cotyloplana whiteleggei, ventral view of the same, x 3. 



Fig. 3. — Cotyloplana whiteleggei, enlarged view of the dorsal surface of the 

 anterior extremity to show the semicircular end with the crenated antero-lateral 

 margins and the two eyes, x 7. 



Fig. 4. — Cotyloplana whiteleggei, enlarged view of the ventral surface of the 

 same specimen as figure 3, to show the sucker with its slit at right angles to the long 

 axis of the body and prominent margin, x 7. 



Fig. 5. — Cotyloplana punctata, dorsal view, x 2. 



Fig. 6. — Cotyloplana punctata, dorsal view of a larger specimen in which in 

 addition to the median light line which does not extend the whole length of the 

 body there is an indication of another light line at the side of the median one. x Ij. 



Fig. 7. — Cotyloplana punctata, ventral view of the same specimen as figure 6, 

 showing the sucker anteriorly, x 1 J. 



Fig 8. — Cotyloplana punctata, enlarged ventral view of the anterior extremity 

 of the specimen represented in figure 6 to show the sucker. In figures 6, 7, 8, the 

 lateral margins are seen to be strongly contracted so as to produce at the anterior end 

 a very concave surface ventrally and convex dorsally. 



Fig. 9. — Rhynchodemus fasciatns, ventral view, x 3. 



Fig. 10. — Rhynchodemus fasciatus, dorsal view of the same, x 3. 



Fig. 11. — Rhynchodemus laterolineatus, dorsal view, x 2. 



Fig. 12. — Rhynchodemus laterolineatus, ventral view of the same, x 2. 



Fig. 13. — Rhynchodemus laterolineatus, ventral view of another specimen, in 

 which the dark bands ventrally are strongly developed, x 3. 



