512 NICHOLAS ZOGRAFF. 



EXPLANATION OF PLATE XLI. 



Illustrating Dr. Nicholas Zograff's paper " On the Construc- 

 tion and Purpose of the so-called Labyrinthine Apparatus 

 of the Labyrinthic Fishes." 



Fig. 1. — The labyrinthine apparatus of Macropodus venustus (from 

 the side), f. 



Fig. 2. — The labyrinthine apparatus of Anabas scandens, var. macro- 

 cephalus (Java) (from side), f. 



Fig. 3. — The labyrinthine apparatus of Macropodus from behind. (Natural 

 size.) 



Fig. 4. — The labyrinthine apparatus of Anabas from behind. (Natural size.) 



Fig. 5. — One of the calyciform cells of the epithelium of the labyrinthine 

 apparatus (Macropodus). ^jp (Leitz, homogen immers. ^t). 



Fig. 6. — A cell of the connective tissue of the labyrinthine apparatus 

 (Macropodus). - 7 -p (Leitz, hom. imm. ^). 



Fig. 7. — Transverse section through the labyrinthine apparatus of Macropo- 

 dus. ar. br 4 . Arteria branchialis 4. ar. lb. Arteria apparati labyrinthiformis. 

 lb. Apparatus labyrinth. ar. lb., vn. lb. Arteria et vena appar. labyrinth. 

 cjt. adp. Conjunctiva adiposa. cjt. mrg. Conjunctiva marginalis. ar. br. 

 Arteria arcus branchialis. ep. Epithelium. - a -^-, Hartnack, f . 



Fig. 8. — Part of the transverse section through the labyrinth apparatus. 

 ep. Epithelium, ep. Capillares labyrinthi. cjt. mrg. Conjunctiva marginalis. 

 cjt. ad. Conjunctiva adiposa. pg. Pigmentum. ct. Cutis. v. a. Vasa 

 arteriosa. os. Os apparati. ifo, Hartnack, f . 



Fig. 9. — Part of a section through the apparatus, fixed with osmic acid. 

 ep. Epithelium, el. gl. Cellula? glutinosae. ct. Cutis, ep. Capillares. ad. 

 Conjunctiva adiposa. ^-|^, Leitz, \. 



Fig. 10. — Part of the surface of the labyrinthine apparatus, c. ad. Groups 

 of adipose tissue, a. Arterise. v. Venae. -$£-, Hartnack, § . 



Fig. 11. — Part of the rete mirabile of the apparatus. -$£-, Hartnack, £ . 



Fig. 12. — Schematic figure of the rosette of the rete mirabile. 



Fig. 13. — Schematic figure of the gill circulatory system of labyrinthic 

 fishes cr. Cor. ao. Aorta, lb. Apparatus labyrinthicus. br. Branchiae. 

 a. br., v. br. Arterise et vense branchiales. 



