PLATE II. 



lantlielJa flaheUiformis, Pallas. 



Fig. 1 . Pt)rtiou of the outer surface, . . . . , x 6 



Fig. 2. Portion of the .skeleton of the leaf-like extension ; natural size. 



Fig. 3. Portion of the skeleton of the stem ; natural size. 



Fig. 4. Portion of a section showing the arrangement of the canal system, . x 200 



Fig. 5. Portion of a section with two flagellated chambers, showing histologi- 

 cal elements of the connective tissue, — Am, amoeboid cells ; 

 St, stellate and fusiform cells, . . . . . x 600 



Fig. 6. Portion of the outer surface (from above) showing the subdermal 



aggregations of fusiform cells and conjectural gland-cells, . x 600 



Fig. 7. Portion of a longitudinal section through the horny walls of a 



skeletal fibre, ....... x 700 



