REPORT ON THE HOLOTHURIOIDEA. 103 



Fig. 3. Transverse section of the dorsal perisoma to show the termination of the 

 madreporic canal and the reproductive organs, a, pores of the madre- 

 poric canal ; b, genital pore ; x, perisoma ; A, madreporic canal ; B, 

 efferent duct of the genital organs. 

 „ 4. Calcareous deposits from the madreporic canal. 



Benthodytes typica, n. sp. 

 „ 5. Transverse section of the dorsal perisoma, showing the termination of the 

 madreporic canal, a, that part of the madreporic canal which pierces 

 the perisoma ; b, funnel-shaped hollow in the dorsal integument ; c, cal- 

 careous network surrounding the pore of the madreporic canal ; d, spicula ; 

 e, epidermis ; /, circular muscular fibres with epithelial lining ; g, con- 

 nective tissue. 



Uyodcemon maculatus, Thdel. 

 „ 6. Transverse section of the dorsal perisoma showing the termination of the 



madreporic canal and the reproductive organs. A, madreporic canal ; B, 



efferent duct of the reproductive organs ; a, pores of the madreporic canal ; 



b, genital process ; e, epidermis ; f, circular muscular fibres with epithelial 



lining ; g, connective tissue. 

 „ 7. The pores of the madreporic canal and the genital process, seen from above. 



s, pores of the madreporic canal; g, genital process. 

 ,, 8. Calcareous deposits from the madreporic canal. 



Lcetmogone ivyviUe-thomsoni, Theel. 

 ,, 9. Termination of the madreporic canal and the reproductive organs. A, 

 madreporic canal ; B, efferent duct of the reproductive organs ; a, papilla; 

 communicating with the madreporic canal ; b, genital process ; c, branch 

 of the genital process. 



Orphnurgus asper, Theel. 

 „ 10. View of the madreporic plate and the terminal part of the madreporic canal ; 

 seen from below. 



Oneirophanta mutabilis, Theel. 

 ,, 11. Side view of the madreporic canal, a, madreporic canal ; b, efferent duct of 



the reproductive organs ; e, mesentery ; m, circular water-vessel ; x, inner 



surface of the body-wall ; y, madreporic tubercle. 

 ,, 12. View of the madreporic tubercle, seen from below. 



Benthodytes sordida, n. sp. 



„ 13. Calcareous deposits from the madreporic canal. 



