06 CEYLON PEARL OYSTER REPORT. 



Fig. 104. Phyllolothrium lactuca, van Ben. x 2. a., outline of proglottides about middle of body; 

 &., the same from posterior part of body. 



105. Head of Phylloboihrium lactuca. x 6. 



106. Tetrarhynchus cquidenlatus. x 4. 



107. Proboscis of the same, x 50. 



108. Tetrarhynchus herdmani. x 6. 



109. The head of the same, x 60. 



110. Tetrarhynchus macrocephahis. x 10. 



111. View of the concave side of a proboscis of the same. 



112. View of the convex side of a proboscis of the same. 



113. Tetrarhynchus platycephalus. x 10. 



114. Head of the same, x 45. 



115. Tetrarhynchus rubromaculatus (Diesino). x 40. a., a further enlarged view of the end of 

 a proboscis. 



116. Tetrarhynchus ruficollis (Eysenh.). x 6. 



117. Head of the same, x 1:2. a., further enlarged view of the end of a proboscis. 



118. Tetrarhynchus ttnimij "actor, x about 100, from alimentary canal of pearl oyster. 



