ii8 
• Bulletin 35 
266 
Page 2S2 
organisms like that called Calcaroma by W. Thomson (see The 
Atlantic, vol. i page 233). Of larger animals the chief remains 
are those of fishes. Otolites are the most abundant of these and 
very curious the)’’ 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 from any West Indian 
deposit I content myself with giving a simple li.st. But the 
determinations are only approximate and possibly some even maybe 
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 Reuss X. Cytherella polita Brady N.P. 
trigonella Sars X dromedaria Brady X. 
simplex Brady X. Bairdia amygdaloides Br. X.P. 
C)'there dictyon Brady X. Krithe bartonensis Jones X.P. 
circumdentata Brady X. producta Brady P. 
vinimea Brady X. 
rastromarginata Brady P. 
(X. Xaparima beds. P. Pointapier Ditrupa bed.) 
On account of the minuteness of the Radiolaria 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 Radiolaria are concerned I believe our 
deposits contain the identical forms found in Barbados. One 
afternoon I sat down and made out from a slide of South Xapa- 
rima marl of my own mounting the following forms named by 
Ehrenberg from Barbados specimens : — 
Eucyrtidium ampulla 
excellens 
montgolfieri 
acephalum 
gematum 
Podoc)Ttis argulus 
puellasinensis 
dominasinen.sis 
mitrella 
Haliomatina humboldti 
entactinia 
oculatum 
Carpocanium coronatum 
Rhabdolithis iugens 
Lithopera lagena 
Halicalyptra setosa 
Flustrella concentrica 
Perichlamydium spirale 
accrescens 
Stylosphaera 
Anthocyrtis 
Lithocyclia 
Cornutella 
Stylodictya 
* On Otoliths of Fish see Stoddart, Intell. Observer vol. iii (1863) p. 98. 
