580 



ALEXANDER MEEK 



7 mm., collar 5 mm., and the trunk, which was cut off at 

 the end of the genital region, about 50 mm. At the posterior 

 end the beginning of the region of the liver caeca was 

 fortunately included. The specimen, as Text-fig. 1 shows, 

 was bent at right angles in the post-branchial region. 



The colour after preservation in spirits is brown, due as 

 will be seen to dark pigment-cells lodged internally to the 



Text-figs, 1, 2, and 3, 



gill . 

 region 



collar 



probos 



CIS 



mouth 



ventral 

 pigment spots 



ventral 

 margin 



i gen. wing 



■proboscis 



Fig. 1, — View from left side of anterior end. 



Fig. 2. — Ventral view of the anterior end of the trunk to display folds 



of oesophageal region which is limited on either side by the ventral 



genital groove. 

 Fig. 3. — Dorsal view of proboscis showing proboscis pore. 



longitudinal muscles of the body-wall. The proboscis is 

 almost white and the gonads yellow. The brown colour 

 marks the collar, on the trunk it differentiates the ventral 

 body-wall from the genital wings. The yellow-coloured 

 gonads stand out prominently on the wings, and the brown 

 colour which intervenes between them and the body-wall 



