ON THE ANASPIDACEA, LIVING AND FOSSIL. 577 
17. Fritsch—‘ Fauna der Gaskohle und der Kalksteine der Perm- 
formation Boéhmens,’ Bd. iv (1901), Heft. 3. 
18. Calman.—‘ Zoologischer Anzeiger, Bd. xxv, No. 661, 1902, p. 65. 
19. Brocchi.—‘ Bull. de la Soc. Geol. de France, 1879, 3rd ser., vol. 
viii, p. 1. 
EXPLANATION OF PLATES 11 AND 12, 
Illustrating Mr. Geoffrey Smith’s memoir on “The Anas- 
pidacea, Living and Fossil.” 
PLATE 11. 
Fie. 1—Anaspides tasmaniz. Dorsal view of a very large speci- 
men. Natural size, in normal position for running. 
Fig. 2.—Paranaspides lacustris. Lateral view. Natural size, in 
position for running or swimming. 
Fie. 3.—Shoot of the liver-wort, Yungermannia, with two eggs of 
Anaspidestasmaniw. x 5, 
PLATE 12. 
Fic. 1.—Transverse section through otocyst of Anaspides, x 50. 
ec, ectoderm; 7, antennulary nerve; m, muscle; 7, setose ridge. 
Fie. 2.—Portion of blood-forming organ of Anaspides, showing 
mitoses and detached corpuscles. 
Fie. 3—Transverse section through the cardiac portion of stomach of 
Anaspides. C and D, lateral ridges; EH, dorsal median ridge; H, 
ventral ridge. 
Fia. 4.—Transverse section through the alimentary canal of Anas- 
pides, where the first diverticulum (div. 1) opens into the mid-gut. 
The section is not quite transverse, so that the opening is only seen on 
the right side. JB, lateral chitinous ridge of pyloric division of the 
stomach extending into mid-gut ; b. m., basement membrane of mid-gut. 
Div. 1, first diverticulum, showing crowded nuclei and mitoses. 
Fic. 5.—Transverse section through anterior portion of mid-gut, 
showing basement membrane (b. m.), and special gland-cells (g.). 
Fia. 6.—Section through a special gland of mid-gut, showing flattened 
nuclei of gland-cells. 
