SIXTEN BOCK, TWO NEW COTYL. GEN. OF POLYCLADS. 21 



The dorsal side is furnished with six longitudinal bands, 

 made up of a brown pigment but of a lighter shade than 

 that of Chro77io plana. These bands are at the frontal end 

 joined into a broad pigmented area close to the frontal line, 

 which area is of a darker shade than the separate bands. 

 At the back end the bands run together and fuse. Plate 1, 

 fig. 2. 



Tentacles are lacking. 



Fig. 4. 



Amyella lineata n. g. n. sp. Above is shown the arrangement of the eyes 

 on the ventral side. The foremost of the cerebral eyes are drawn. Beneath 

 are the cerebral dusters seen from the dorsal side. All marginal eyes 

 cannot be traced on account of the thickness of the body and the pigment 



ov. ovary. 



There is a doubJe cluster of cerebral eyes. Each duster 

 is elongated and formed by 10 to 12 eyes (text fig. 4). There 

 are also marginal eyes on a restricted area just a t the front 

 of the animal. They occur in one or two rows, most of them 

 visible only from the ventral side (text fig. 4, above). These 

 marginal eyes form two not very distinct dusters, each made 

 up of 3—6 eyes. It may be mentioned that the marginal 

 eyes are only inconsiderably smaller than the cerebral eyes. 

 In the position of the eyes there is nothing remarkable, 

 agreeing fairly well with the arrangement generally met with 



