PLATE V. 



F10S. 



1. Maria unicornis, Lycett. I. 0., Nailsworth. Jermyn Street Museum. 



(Page 119.) 



2. Al. Dundry ensis, Tawney. Type re-figueed. I. 0., Dundry. Bristol 



Museum. (Page 122.) 



3. Al. fusca, sp. nov. Cadomensis-bed. Oborne. My collection. (Page 121.) 



4. Al. " alienigena.'' I. 0., Dorsetshire. My collection. (Page 121.) 



5 a. Al. Boubaleti, Schlumberger, var. Dorsetensis. Sowerbyi-bed, Bradford 



Abbas. My collection. Showing front and base. 1 (Page 123.) 

 5 b. The same. Wide-angled variety. I. 0., Dorsetshire. My collection. 

 5 c. The same. Another specimen. I. 0., Dorsetshire. My collection. 

 5 d. The same. Another specimen. Sowerbyi-bed, Bradford Abbas. Buckman 



collection. See also PI. VII, fig. 10. 

 5 e. The same. Immature form. Sowerbyi-bed, Bradford Abbas. My collection. 

 5/. The same. Small variety. Scarborough Limestone, Pickering Cliff. My 



collection. 

 6. Al. Boubaleti, Schlumb., var. " dimidiata." ? concavus-bed, Halfway House. 



Whidborne collection. (Page 124.) 

 7 a. Al. (compare) unicornis, Lycett, var. Bradfordiensis. Sowerbyi-bed,~Bra,d£ord 



Abbas. Buckman collection. (Page 120.) 

 7 b. The same. Murchisona-zone, Bradford Abbas. My collection. 



8. Al. pseudo-armata, Hudleston. Dogger, Blue Wyke. Leckenby collection. 



(Page 125.) 



9. Al. Lotharingica, Schlumberger. I. 0., Dundry. Bristol Museum. (Page 



125.) 



10. Al.prailonga, sp. nov. Murchisonce-zorxe, Halfway House. Buckman collec- 



tion. (Page 126.) 



11. Al. Doublieri, D'Orb. var. B. Cadomensis-bed, Oborne. My collection. 



(Page 128.) 



1 Explanation of letters — a, anterior spine ; p, posterior spine ; c, canal sheath (tail) ; w, wing. 



