FIGs, 
PLATE Y. 
. Alaria unicornis, Lycett. I. O., Nailsworth. Jermyn Street Museum. 
(Page 119.) 
. Al. Dundryensis, Tawney. Type re-Ficurep. I. O., Dundry. Bristol 
Museum. (Page 122.) 
. Al. fusca, sp. nov. Cadomensis-bed. Oborne. My collection. (Page 121.) 
4, Al. “ alienigena.” I. O., Dorsetshire. My collection. (Page 121.) 
10. 
a: 
. Al. Roubaleti, Schlumberger, var. Dorsetensis. Sowerbyi-bed, Bradford 
Abbas. My collection. Showing front and base.’ (Page 123.) 
. The same. Wide-angled variety. I. O., Dorsetshire. My collection. 
. The same. Another specimen. I. O., Dorsetshire. My collection. 
. The same. Another specimen. Sowerbyi-bed, Bradford Abbas. Buckman 
collection. See also Pl. VII, fig. 10. 
. The same. Immature form. Sowerbyi-bed, Bradford Abbas. My collection. 
. The same. Small variety. Scarborough Limestone, Pickering Cliff. My 
collection. 
. Al. Roubaleti, Schlumb., var. ‘ dimidiata.” ? concavus-bed, Halfway House. 
Whidborne collection. (Page 124.) 
,. Al. (compare) wnicornis, Lycett, var. Bradfordiensis. Sowerbyi-bed, Bradford 
Abbas. Buckman collection. (Page 120.) 
. The same. Muchisone-zone, Bradford Abbas. My collection. 
. Al. pseudo-armata, Hudleston. Dogger, Blue Wyke. Leckenby collection. 
(Page 125.) 
. Al. Lotharingica, Schlumberger. I. O., Dundry. Bristol Museum. (Page 
125.) 
Al. prelonga, sp.nov. Murchisone-zone, Halfway House. Buckman collec- 
tion. (Page 126.) 
Al. Doublieri, D’Orb. var. B. Cadomensis-bed, Oborne. My collection. 
(Page 128.) 
' Explanation of letters—a, anterior spine; p, posterior spine ; c, canal sheath (tail) ; w, wing. 
