EXPLANATION OP PLATES VI, VII, VIII, IX, X, XI, XII— continued. 



the fresh condition, the red granules _^ which give the gland its brick-red 

 colour being here represented with their natural tint. f. Free border of 

 the epithelium, x. Deep border. Magnified 2500 diameters. 



Pig. 7. — A somewhat thick section of the capsuligenous tissue of Liraulus, 

 with the protoplasm omitted in order to show the form and connection of the 

 capsules. Magnified 300 diameters. 



Fig. 8. — A similar view of the skeletal element (membranous capsules or 

 trabeculse) of the lacunar tissue of Limulus. 



Pigs. 9 and 10. — Large-celled connective tissue of scorpion (And roct onus 

 funestus). b. Skeletal trabeculse. Magnified 430 diameters. 



PLATE XII. 



All the figures are drawn to the same scale, viz. they represent the object 

 magnified 500 diameters. The colours are arbitrary. 



Pig. 1. — Portion of the coxal gland of Mygale sp. If. Protoplasm of 

 the gland-epithelium cells. In. Nuclei of the gland-epithelium cells, cr. 

 Striated cortical layer of the gland- epithelium cells, col. Colloid substance 

 of the inter-cffical tissue or framework, en. Nuclei of the same tissue stained 

 by borax-carmine, the surrounding protoplasm unstained. K. Lumen of the 

 glandular cseca. 



Pig. 2. — Tangential section of a caecum of the coxal gland of a scorpion 

 (Buthus cyaneus), showing the striated cortical layer surrounding the 

 gland-epithelium cells. Letters as in Fig. 1. 



Fig. 3. — Portion of the entosternite of Mygale, in which there are fissures 

 containing masses of colloid substance {col). The matrix (c) of the ento- 

 sternite is coloured grey, the nuclei {en) of the cells are red, and the sur- 

 rounding protoplasm is unstained. 



Pig. 4. — Portion of the coxal gland of Limulus. a. Nuclei of the inter- 

 caecal connective tissue, b. Fibres of the same. e. Lacunae of the same. 

 Other letters as in Fig. 1. 



Fig. 5. — Portion of the coxal gland of a scorpion (Buthus cyaneus of 

 Ceylon). Kc. Coagulum in the lumen of one of the glandular ca?ca. 0. Space 

 or channel of the inter-cseeal connective tissue (corresponding to e in Fig. 4). 

 m. Nuclei of the intercsecal connective tissue (corresponding to a in Fig. 4). 

 cr. Cortical striated substance of the glandular epithelium. In. Nuclei of 

 the gland-cells. Ip. Protoplasm of the gland-cells. 



