4 
The tubeshell found abundantly in the Ditrupabed of 
Pointapier and taken by me in the first instance to bo 
the shell of a worm and hence called by me Ditrupa, was 
afterwards determined to be a Mollusk. It was described 
as Gadulus parianus in the Proceedings of the U. S. Na- 
tional Museum (Vol. xix, 1896, Page 325, Pl. xxx F. 7.) in 
the Corosal Road Bed a somewhat similar shell occurs- This 
is marked by distinct characters. It widens more grad- 
ually from the initial to the oral end, and it is annulate 
by rounded costae while C. parianus is smooth. Thus it 
has some resemblance to Caecum. It may be diagnosed 
as follows. 
CADULUS PERANULATUS N. SP- 
Shell tubular curved widening somewhat rapidly, an- 
nulate by regular rounded riblets, swollen near the broader 
end and constricted at the aperture. Length 4 mm. greatjes 
diameter 1mm. The ampliations become larger and ob- 
solescent towards the oral end. 
I have also detected the following Molluska in the Co- 
rosal Ditrupabed 
Cylichna mirrotrema Dal. Corbula heterogenea Gup. 
Turbonila tenuilineata Gup. Leda acuta Gab. 
Benthonela turbinata Gup. Leda flexuosa Heilp. 
Marginela arcuata Gup. 
Marginela soverbii Gab. Dentalium prisma Dal. 
Mangelia consentanea Gup. 
Clavatula labiata Gab. 
Pleurotoma haitonse Sow. 
Teinostoma (Vitrinela) vitrea Gab. 
Clea truncata Gab. 
Nasa caribea Gab. 
