TERTIARY MOLLUSC A. 



107 



Guiana, is in accord with the similarity pointed out by Brown and 

 Pilsbry between H. antiguensis and other South American species. 

 The species now known from this fresh-water fauna are the following: 



Hemisinus antiguensis Brown and Pilsbry. 

 siliceus Brown and Pilsbry. 

 latus Brown and Pilsbry. 

 atriformis, n. sp. 



Bythinella antiguensis Brown and Pilsbry . 

 Planorbis siliceus Brown and Pilsbry. 



Species from Antigua. 



Species. 



Remarks. 



Epitonium antiguense (Brown) 



Turritella crocus, n. sp 



Turritella forresti Brown 



Ampullinopsis spenceri, n. sp. 



Turbo antiguensis, n. sp 



Scapharca willobiana, n. sp . . 

 Ostrea antiguensis Brown. . 

 Pecten oxygonum Sowerby^ 



Pecten cf . P. oxygonum Sby . 



Pecten nugenti Brown 



Pecten willobianus, n. sp. . . . 

 Pecten anguillensis Guppy . 



Pecten duplex, n. sp 



Pecten perlineatus, n. sp 



Pecten nodosissimus, n. sp . . . . 



Pecten sp 



Amusium antiguense (Brown) . 

 Spondylus bostrychites Guppy 



(?] 



Lithophaga nigra (d'Orbigny) . 



Lithophaga sp 



Semele? sp 



Antigona ccesarina var. anguil- 



lana, n. var. 

 Chione spenceri, n. sp 



Anguilla. 



Also at Willoughby Bay 



(Brown). 

 Anguilla? close to Tampa 



and Cbipola species. 



Santo Domingo and Bow- 

 den. 



Anguilla; also Wetherells 

 Bay (Brown). 



Anguilla, Tampa, Bow- 

 den, Santo Domingo. 

 Tampa and Recent, Cuba. 



Anguilla, Bainbridge?, 

 Cbipola (variety). 



List of Stations in Anguilla. T. W. Vaughan, Collector. 



6893. Crocus Bay, hill, roadside, descent to Crocus Bay from valley. 



6894. Crocus Bay, southwest side. 



6964. Crocus Bay, southwest side; fossils from rubble above shore-line. 



6965. Crocus Bay, southwest shore; fossils from lowest 10 to 15 feet of fossihferous marls. 



6966. Crocus Bay, southwest side, 30 to 50 feet above sea-level. 



6967. Crocus Bay, bluff on southwest side, uppermost horizon, 125 feet above sea-level, 



6971. Slope^bout KwleTabove sea-level, between Little Harbor and Pelican Point. 



The mollusks from all the localities in Anguilla, with the possible 

 exception of station 9664, which is beach rubble, appear to represent a 

 single geologic horizon. The fauna includes species common to forma- 

 tions of ages ranging from the middle Oligocene coral reef at Cam- 

 bridge, Georgia, to the Bowden marl of Jamaica, but the number ol 



