282 



organisms like tliat called Calcaroma by W. Thomson (see The 

 Atlantic, vol. 1 page 233). Of larger animals the chief remains 

 are those of fishes. Otolites are the most abundant of these and 

 very curious they are. Teeth are not uncommon, but not so 

 abundant as otolites.* 



Little attention seems to have been paid to the Ostracoda 

 either recent or fossil of the West Indies. They are doubtless of 

 high interest and I have made a beginning in the identification 

 of the forms found in the Naparima rocks. I might have included 

 them in the table, but as none are recorded f I'om any West Indian . 

 deposit I content myself with giving a simple list. But the 

 determinations are only approximate and possibly some even may be 

 generically wrong as my slender acquaintance with these minute 

 Crustacea does not admit of greater exactness and there is no 

 literature to refer to on the subject of West Indian Ostracoda. 



Pontocypris faba lleuss N. Cytherella polita Brady N.P. 



trigonella Sars N. dromedaria Brady N. 



simplex Brady N. Bairdia amygdaloides Br. N.P. 



Cy there dictyon Brady N. Krithe bartonensis Jones N.P, 



circumdentata Brady N. producta Brady P. 



viminea Brady N. 



rastromarginata Brady P. 

 (N. Naparima beds. P. Pointapier Ditrupabed.) 



On account of the minuteness of. the Badiolaria and Diatoms 

 and the quantity of extraneous matter associated with them they 

 are difficult to isolate and mount and I have not done much in 

 this way. So far as the Ptadiolaria are concerned I believe our 

 deposits contain the identical form^ found in Barbados. One 

 afternoon I sat down and made out from a slide of South Napa- 

 rima marl of my own mounting the following forms named by 

 Ehrenberg fi'om Barbados specimons : — 



Eucyrtidium ampulla Garpocanium coronatum 



excellens Rhabdolithis ingens 



'montgolfieri Lithopera lagena 



acephaluui Halicalyptra setosa 



gematum Fiustreila concentrica 



Podocyrtis argalus Perichlamydium spirale 

 puellasinensis accrescens 



dominasinensis Stylosphoera 



mitrella Anthocyrtis 



Haliomatina humljoldti Lithocyclia 



entactinia Cornutella 



oculatum Stjdodictya 



On Otoliths of Fish see Stoddart, Intel), Observer vol iii (1S53) p 



