PLATE IV. 
FIas. 
1. Alaria arenosa, Hudleston. Dogger Sands. Leckenby collection. 
(Page 110.) 
2. Al. angusta, sp. nov. Inferior Oolite. Bristol Museum. (Page 111.) 
3. Al. * crassicostata.” Dogger, Blue Wyke. My collection. (Page 111.) 
4, Al. “ Hortonensis.” Parkinsoni-zone, Horton Hill. My collection. (Page 
112.) 
5a,b. Al. spinulosa.” Two specimens. Dogger, Blue Wyke. (Page 118.) 
6 a, b,c, d. Al. hamus, Deslongchamps. Four specimens. Parkinsoni-zone, 
Burton Bradstock. My collection. (Page113.) See also Pl. VII, fig. 9. 
7a. Dwarfed var. of Al. hamus. Parkinsoni-zone, Notgrove. 7b, another 
specimen. Parkinsoni-zone, Horton Hill. My collection. (Page 115.) 
7c. Another variety, ‘tricincta.’’ Gryphite-grit near Stroud. Witchell 
collection. (Page 115.) 
8a. Al. hamus, var. Phillipsii, D’Orb. Scarborough Limestone, Cloughton 
Wyke. My collection. 8b, specimen from the Dogger. 8c, from 
Millepore Rock or Scarborough Limestone. Both Leckenby collection. 
(Page 116.) 
9. Al. hamus, var. nodosa. Inferior Oolite, Stoford. Buckman collection. 
(Page 117.) 
10. Al. pinguis, sp. nov. Inferior Oolite, Dorset. My collection. (Page 117.) 
See also Pl. VII, fig. 11. 
11. Immature form of Alaria ? Phillipsii. Gryphite-grit, near Stroud. Witchell 
collection. (Page 115.) 
12. Al. ef. rarispina, Schlumberger. ? Sowerbyi-bed, Dorset. Whidborne col- 
lection. (Page 118.) 
13a, b,c. A. unicarinata, Hudleston. Three specimens. Dogger, BlueWyke. 
My collection. (Page 118.) 
