TENTACLES OF BLENNIUS GATTOEtJGINE. 305 



EXPLANATION OF THE PLATES. 



Plate 22. 



Fio". L A transverse section of the main stem of a tentacle of Blennius yattoruyine ; low 

 power. Partly diagrammatic. 



a, One of the "Kolben." b, blood-vessels. C, corium. C.T., the deeper 

 connective tissue. Ep., epidermis. F., one of the radially-disposed bundles 

 of connective-tissue fibres, m., mucous cells (round form). N., nerve- 

 bundles. P., pigment. Pa., dermal papillae. 



Fig. 2. A small portion of the edge of a transverse section of the same. 



A " Kolbe." C, the outer layer of columnar epithelium. Co., corium. 

 L. " lens-like " body in perpendicular column of connective tissue. M., round 

 form of mucous cell. P., pigment-cell. ?«., nucleus of pigment-cell. «.', double 

 nucleus of Kolbe. Cam., oil imm. j^2 ", oc. x8. 



Fig. 3. Blennius ocellaris. Small portion of the skin of the tentacle in longitudinal 

 section. 



C, Stratified outer part of corium. Cu., cuticle. Ep., epidermis. T., group 

 of elongated cells, possibly a taste-bud. Cam., oil imm. -^^" , oc. x8. 



Plate 23. 



Fig. 4. Blennius gattoruyine. Portion of transverse section of the stem of a tentacle. 



T., A group of elongated cells (taste-bud ?). Other letters as in tig, 2. Cam., 

 oil-imm. -jV"v oc. x8. 

 Fig. 5. Blennius gattoruyine. Part of the edge of a transverse section of one of the 

 " twigs " of a tentacle, stained with gold chloride. 



C. Corium. C.T., connective-tissue and nerve-fibres, ^., end-cell. jBp., epi- 

 dermis, h., hair-like termination of end-cell, n., nerve-fibres. P., pigment. 



Cam., oil-imm. jy"") '^'^* ^^• 

 Fig. 6. Portion of a similar section, more highly magnified. 



Lettering as in fig. 5. E.', end-cells cut obliquely or to one side. 

 Fig. 7. Isolated elements of the epithelium of the tentacle of B. gattoruyine. 



(Macerated in weak alcohol, stained with picrocarmine, and examined in 

 glycerine.) 



E., End-cells. Ep., ordinary epiderm-cells. E.' , an end-cell with bifurcated 

 base, d., distal extremity of end-cell, n., proximal end, with minute nerve- 

 fibre, n'., nucleolus. Cam., obj. i", oc. x8. 

 Fi^. 8. B. gattoruyine. Part of a longitudinal section near the base of a tentacle prepared 

 with osmic acid. 



a, clear flask-shaped mucous cells, occurring only near the base, b, round 

 form of mucous cells, blackened with osmic acid. Other lettering as before. 

 Obj.i",oc. X5. 

 Fig. 9. B- gattoruyine. Portion of transverse section of a tentacle. 



A 'Kolbe," in median section. A', another, cut to one side. M., round 

 form of mucous cell, o., opening of the cavity of the " Kolbe." Other letters 

 as in previous figures. Cam., oil-imm. -j^", oc. X 5. 



LINN. JOUUN. ZOOLOGY, VOL. XXXII. ^2.^ 



