MONOGRAPH OF THE GENUS STROPHIA. 
163 
other species found on Andros, as far as I have seen them, excepting 
one to be described later, the upper whirl is about as long as all the 
other whirls together. Aside from this peculiarity, S. regula may be 
at once distinguished by the large size, narrow, equally wide striations, 
arranged in lines across the rather narrow whirls, which have shallow 
sutures, that are not notched, thus the whole combination makes up 
one of the most beautifully regular species of Strophia that I have 
ever seen, being excelled in this respect only by S. dallii, from Inagua, 
but, of course, S. dallii belongs to an entirely different sub-genus ; see 
page 130 of Yol. I of these Contributions. 
Since a large portion of the present instalment of my monograph 
has been put into type, I have received Dr. Dali’s paper on the 
shells collected during the “ Cruise of the Steam-yacht ‘ Wild Duck ’ 
in the Bahamas, January to April, 1893, in charge of Alexander 
Agassiz,” which paper occupies No. 9, of Yol. XXV, Bulletin of the 
Museum of Comparative Zoology. On pages 121 to 123 of this paper 
Dr. Dali has named the groups which I suggested were clearly 
separable, considering them, as being at least sub-generic. 
Dr. Dali’s names for the sub-generic groups suggested by me are 
as follows, the characters, however, are from the earlier pages of my 
Monograph : 
1. DIACERION. 
Lower tooth greatly elongated, channeled; position cen- 
tral. S. dalli Mayn. is Dali’s type. 
2. STROPIIIOPS. 
Lower tooth elongated, simple ; position central. Type 
given by Dali, Pupa ducamana Fer. 
3. MAYNARDIA. 
Lower tooth, short, simple ; position central. Dali’s type 
is S. neglecta Mayn. 
4. CERION. 
Lower tooth, short, simple, position not central. Dali’s type 
is Turbo uva Linn. 
5. EOSTROPHIA. 
Lower and upper teeth absent. Type, E. anodonta Dali. 
This last group was defined by Dali in Cf. Trans. Wagner Inst., Vol. 
III, No. 12, August, 1890. 
