335 



Guppy Reprint 



187 



shell occurs. This is marked by distinct characters. It widens more 

 gradually from the initial to the oral end, and it is annulate by 

 rounded costse while C. parianus is smooth. Thus it has some 

 resemblance to Caecum. It may be diagnosed as follows. 



CADULTJS PERANUIATUS N. SP. 

 Shell tubular curved widening somewhat rapidly, annulate by 

 regular rounded riblets, swollen near the broader end and con- 

 stricted at the aperture. Length 4 mm. greatest diameter 1 mm. 

 The annulations become larger and obsolescent towards the oral 

 end. 



I have also detected the following Molluska in the Corosal 

 Ditrupabed 



Cylichna mirrotrema Dal. 

 Turbonila tenuilineata Gup. 

 Benthonela turbinata Gup. 

 Marginela arcuata Gup. 

 Marginela soverbii Gab. 

 Mangelia consentanea Gup. 

 Clavatula labiata Gab. 

 Pleurotoma haitense Sow. 

 Teinostoma (Vitrine)a) vitrea Gab. 

 Clea truncata Gab. 

 Nasa caribea Gab. 



Corbula heterogenea Gup. 



Leda acuta Gab. 

 Leda flexuosa Heilp. 



Den tali um prisma Dal. 



Page 5 



Some polyzoa also occur in the bed, the most noticeable be- 

 ing Diastroporlea umbelata or a nearly allied species, and a Vin- 

 cularia. These are also found in the Pointapier Ditrupabed : 

 they are almost always in fragments. Besides Planorbidina lar- 

 vata other Foraminifera occur for instance Cornuspira and amo- 

 discus. Many, others await a diligent collector. The determina- 

 tions I have given are in some cases approximate only and must 

 be verified by additional examples and further study. There is 

 a grand field here for the collector of fossils. 



