566 MR R. BULLEN NEWTON ON SOME CRETACEOUS BRACHIOPODA 



with about 20 equal costse and furrows, which are ornamented with a close and trans- 

 versely striated surface. The ears are not visible. 



Pervinquiere refers to small forms of this species, with a similar number of ribs 

 to the present specimen, which he found in Tunisia, although the presence of a 

 transversely striated sculpture is not mentioned in connection therewith, nor is it 

 a usual character of the shell, which is supposed to bear a smooth surface. Such a 

 sculpture does exist, however, in well-preserved specimens of the species. It should 

 be mentioned that Vola cf. sequicostata has been recognised by M. Choffat * as 

 occurring in the Schloenbachia injiata zone of Dombe Grande, Angola ; but whether 

 it belongs to the same species as Dr Gregory's shell it is impossible to say, as the 

 statement is without description or figure. 



It is of interest, also, to remark that the present Angola specimen shows a 

 resemblance to Neithea sergipensis of C. A. White t from the Schloenbachia injiata 

 zone of Brazil (Sergipe). 



Distribution. — This species is characteristic of the Cenomanian rocks of Europe 

 (France, England, Germany, Portugal, etc.). In Portugal it occurs in Turonian beds, 

 Pervinquiere having alluded likewise to its occurrence in the Cenomanian of Tunisia. 



Occurrence. — The specimen is embedded in a cream-coloured limestone, associated 

 with small examples of a Lima. 



Locality. — No. 294 — from E. of Lobito, plateau 800 feet. 



Neithea angoliensis, sp. nov. (PI. 1, fig. 4.) 



Description. — Lower valve small, of arched contour, umbonal region comparatively 

 narrow ; latero-marginal surfaces nearly vertical, depressed, smooth ; pallial region 

 furnished with 6 robust, equidistant primary costse, and intermittent furrows 

 occupied by a single median rib with an occasional accessory rib. 



Dimensions. — 



Length ...... 10 mm. 



Height . . . . . . 15 „ 



Remarks. — This specimen is quite a small form of Neithea, and exhibits an 

 external view of a lower valve. Any fine surface sculpture that may have originally 

 existed is entirely obliterated. The ears are not disclosed. Only one probable 

 accessory rib can be traced, this being seen very obscurely near the ventral margin 

 on the posterior corner of the specimen ; otherwise a single secondary rib occupies 

 each of the furrows. 



In contour the specimen appears to be related to both Janira tricostata of 

 Coquand \ from the Cenomanian of Algeria and Tunisia, and Janira jicalhoi § of 



* (Jontrib. G4ol. Colonies Portugaises Afrique, 1 905, part 2, p. 58. 



t " Contributions to the Paleontology of Brazil," Archiv Mus. Nation. Brazil, 1888, vol. vii, pi. iii, figs, 6, 7, p. 39. 



\ Ueuloyie et Pale'ontologie Constantine, 1862, pi. xiii, figs. 3, 4, p. 219. 



§ M4m. Soc. Phys. Hist. Nat. Gentee, 1888, vol. xxx, No. 2, pi. v, figs. 8-10, p. 89. 



