32 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE L 

 Licnophora macfarlandi, sp. nov. 



Fig. I. Section of respiratory tree of Holothuria californica with both in- 

 fusoria attached to the lining epithelium, a, Licnophora macfar- 

 landi; b, Boveria subcylindrica. Fixed with Hermann's fluid, 

 stained with Heidenhain's iron-haematoxylin. Leitz, ocular 3, 

 objective 7, camera lucida. 



Fig. 2. Dorsal view of living Licnophora attached to glass slide, a, attach- 

 ment disc; d, neck; c, oral disc; in}-, outer ciliary membrane; v, 

 velum underneath ciliary membranes; d, end of smaller neck 

 fibre; e, vibrating neck membrane; />, pharynx; f, food mass; g, 

 oral cilia. L. oc. 3, ob. 7, cam. 



Fig. 3. Ventral view of Licnophora attached to cover-glass. Lettering 

 same as in fig. 2. h^ ventral neck groove; mj, m^, m^, m^, ciliary 

 membranes; i, transverse basal band of oral ciliary band; o, mouth- 

 opening. L. oc. 3, ob. 7, cam. 



