158 T. Davidson — On Tertiary Brachiopoda. 



T. hiplicafa; but as both bear mucli resemblance to certain Cretaceous 

 species, it will be preferable, until more is known respecting the 

 age of the rock from which they were derived, to leave their final 

 identification an open question. 



APPENDIX. 

 Note on two Tertiary species of Brachiopoda from the 

 Island of St. Bartholomew, one of the North-eastern West 

 India Islands, 



(PLATE VIII., Figs. 11 and 12.) 

 I am indebted to the kindness of Mr. P, T. Cleve, of Stockholm, 

 for the gift of two species of Brachiopoda procured by him from a 

 hard compact limestone at St. Bartholomew, and which he mentions 

 in his excellent description of that island.^ 



1. Terebratula carneoides, Guppy, PI. YIII. Pig. 11. 



In 1866 Mr. Guppy described and figured an incomplete specimen 

 of this species, which he had obtained from strata referable to the 

 Lower Miocene series near the town of St. Fernando in Trinidad.* 

 Since then Mr. Cleve found that the species occurred abundantly, 

 and in a perfect state of preservation, in rocks of about a similar 

 age in the Island of St. Bartholomew, and of which we here append 

 a figure in order to complete the description and illustration pub- 

 lished in the Quarterly Journal of the Geological Society. T. car- 

 neoides approaches most to T. carnea, but differs from T. vitrea by 

 the strongly marked curve of its frontal margin. 



2. Argiope Clevei, n. sp., PL YIII. Pig. 12. 



Shell semicircular, wider than long, hinge-line as long as the 

 greatest width of the shell. Dorsal A'alve almost flat or very slightly 

 convex. Ventral valve convex, and much deeper than the opposite 

 one. Area triangular, flat, of moderate width, and perforated by a 

 largish foramen. Surface of each valve marked by about twenty- 

 two small roimded ribs, of which half the number are short, being 

 interpolated between those that radiate direct from the beak to the 

 margin. Interior unknown. Length 4, width 5, depth 2 lines. 



Mr. Cleve states that he has found one specimen only of this 

 Argiope in the same locality and formation along with T. carneoides. 

 It is remarkable on account of its large size. 



EXPLANATION OF PLATES VII. AND VIII. 



PLATE VII. 



Figs. 1, 2, 3. ZinffulaDumortieri,'Njst. Crag, Antwerp. 2, 3. Museum of Brussels. 



4, 5. Discina Suessi, Bosquet. 4. Exterior; 5. Interior of ventral valve 



much enlarged. Middle Oligocene, Elsloo, in the Dutch Limbourg. 



After Bosquet. 



6, 7. Crania Nysti, n. sp. Eocene, Dieghem, near Brussels, and Brussels 



Museum. Qb. Enlarged. 



1 On the Geology of the North-eastern "West India Islands, Kongl. Svenska 

 Vetenskaps-Akademiens Handlingar, Bandet 9, No. 12, 1871 (read 23rd November, 

 1870). 



2 Quart. Journ. Geol. Soc. vol. xxii. p. 296, pi. xix. fig. ii., 1866; see also 

 " Geologist," vol. vii. p. 159. 



