46 LAND PLANARIANS FROM LORD HOWE ISLAND. 



Genus Khynchodemus. (Leidy.) 



Rhynchodeiiius fasciatus,s]). n. (PL V., Figs. 9, 10.) 



Dorsal face marked by a median broad blackish-brown band tapering suddenly 

 anteriorly ; at either side of this are two dark bands separated by light lines the inner 

 of the two former being broader than the outer. The edges of the upper surface are 

 light coloured. The dark bands imite together some little distance in front of the 

 posterior end leaving a distinct light margin. Eyes two placed close to the anterior 

 end where the two outer dark bands unite together on each side. 



Ventral surface of dun colour with broad darker band in the median line and a 

 narrow dark line on either side. Dark bands not nearly so prominent as on the 

 dorsal surface. 



Pharyngeal opening 12 m.m. from the posterior end. Genital opening 9 m.m. 

 from the posterior end. Length when alive, 50 m.m. In spirits 29 m.m. 



Locality.— Lord Howe Island. (Coll. Mr. T. Whitelegge.) 



The bands as described above are probably much more distinctly marked in 

 spirit than in living specimens. Mr. Whitelegge notes the colour as blackish brown 

 on the dorsal surface with two light lines on the laterals, the ventral surface being dun 

 colour. There are seen very clearly in spirit specimens five dark bands as shown in 

 the figure (10) dorsally and three bands on the ventral surface though the latter are 

 faint when compared with the former. A characteristic feature is the way in which 

 the broad median land suddenly narrows at the anterior extremity whilst posteriorly 

 it is broad and merges into the lateral ones. 



Rhynchodemus later olineatus, sp. n. (PI. V., Figs. 11, 12, 13.) 



Body much flattened ; pointed at both extremities. Edges of body with 

 strongly marked dark bands tapering at both ends. Two dark lines along the body 

 leaving between them a median narrow line of ground colour. 



Ventral surface with two dark lines one on either side of the median line and 

 uniting anteriorly and posteriorly before reaching either extremity. Close to the 

 two lateral dark bands is a dark line on each side ; the two unite together anteriorly 

 but posteriorly merge into the lateral bands. The dark bands on the ventral surface 

 may be broad and as many as six be present. 



Pharyngeal opening 11 m.m. from post end. Genital opening 6 m.m. from the 

 posterior end. Length of animal when alive 38 m.m. Length in spirit 25 m.m. 



Locality. — Lord Howe Island. (Coll. Mr. T. Whitelegge.) 



