276 C. H. MARTIN. 
7. Grarr.—* Turbellarien,” ‘Bronn’s Thierreich.’ 
8. Grosvenor.—“‘ Nematocysts of Aolids,” ‘ Proc. Roy. Soc.,’ Ixxi, 1903. 
9. Hatiez.—‘ Contributions a I’Histoire naturelle des Turbellariés,’ Lille. 
1879. 
‘Zoologie Descriptive,’ Paris, 1900. 
11. Iwanzorr.—“ Ueber die Wirkungsweise und die Entwicklung nessel- 
kapseln von Coelenteraten,’’ ‘ Bull. Soc. Imp. Nat. Moskow,’ 1896. 
12. Lane.—‘ Monograph der Polycladen,” Naples. 
13. OpnrstED.— Plattwurmen,’ Copenhagen, 1844. 
14. Lanprnretp.—‘‘ Nesselzellen der Coridaiien,”’ ‘Biol. Centralblatt,’ 1897. 
15. Pixrarp.— Le Mécanisme de la detente dans les cellules urticantes,” 
‘Arch. Soc. Phys. et Nat.,’ xxix, Geneva, 1893. 
16. pu Puessis, G.i— Rev. Suisse Zool.,’ v, 1897. 
17. S1mBoLp, von.—‘ Lehrbuch der Vergleichenden Anatomie,’ 1848. 
18. Situuman.—‘‘ Beobachtungen iiber die Susswasser Turbellarien Nord 
Ameriken,” ‘ Zeit. f. wiss. Zool.,’ xli, 1888. 
19. SrretwHitt Wricut.—(a) * Proc. Roy. Phys. Soc.,’ vol. i, p. 206, 1856; 
(6) ‘Q.J.M.S&.,’ vol. iii, p. 52, 1863. 
20. Zacuarias.— Faunistische Mittheilungen,” ‘ Biol. Stat. Plon.,’ 1894. 
EXPLANATION OF PLATE 14, 
Illustrating Mr. C. H. Martin’s paper on “The Nematocysts 
of Turbellaria.” 
Fic. 1.—An oval barbed nematocyst with two small oval nematocysts lying 
in a common vacuole under the skin of a living Microstoma lineare. 
Zeiss apoc. 2 mm. + 6 comp. oc. 
Fie. 2.—Small oval nematocyst from a living Microstome. Outline same 
magnification as Fig. 1. 
Fic. 3.—Cylindrical nematocyst in vacuole in skin of Microstoma 
lineare. 
Fic. 4.—Part of a transverse section through Microstoma lineare fed 
on Hydra rubra. 
a. Oval barbed mematocyst in gut cell. 
6. Under the skin, 
c. A cell from the wall of the vacuole lying above the nematocyst. 
