Dr. J. W. Gregory — Geology of Somali-land. 291 



He has also brought back some large mica crystals, which are 

 sufficiently large and clear to suggest that a supply may be obtained 

 of economic value. 



His last addition to the series is a lump of an intensely altered 

 hornblendic gneiss from the summit of Wein Deimoleb (or Deymole). 

 Tliis is of interest as proving that outcrops of the Archean series 

 occur in the Maritime Mountains. 



III. Description of a new species of coral. 



Cryptoccenia Lort-PhilUpsii, n.sp. 



Diagnosis. — Corallum massive, hemispherical. 

 Calices circular, deep. 



Septa hexameral ; of two orders. The primary septa are thin, 

 and in length are equal to a third the width of the calix. 

 Secondary little more than rudimentary. 

 Costa conspicuous. The confluence of the costaj of different 



calices is well marked. 

 Intercalicinal areas very narrow. 

 Dimensions. — Diameter of calices, 2 mm. ; distance of calicinal 

 centres, 3 mm. ; number of septa, 6 large and 6 rudimentary ; length 

 of primary septa, f mm. ; height of corallum, 45 mm. ; diameter of 

 corallum, 55 mm. 



Distribution. — Limestone of Maritime Mountains at Duba, 

 8 miles south of Berbera, Somali-land. — Presented to the Geological 

 Department by Mrs. E. Lort-Phillips. 



Affinities. — This species belongs to the group of Cryptocoenice, in 

 which the septa are hexameral. Of known species it is most allied 

 to Cryptocoenia Neocomiensis (E. de F.). 1 From this, however, it 

 clearly differs by having only two orders of septa, and by having 

 thinner intercalicinal areas. Of Jurassic Hexacryptoccenice, it is 

 nearest to Cryptocoenia Thiessingi, Koby, 2 from the Swiss Sequanian ; 

 but from this it differs owing to the greater amount of ccenenchyma 

 and greater size of the secondary septa in the Swiss species. 



There is some doubt as to the age of the Duba limestone. From 

 stratigraphical considerations one would be inclined to regard it as 

 part of the same series as the limestones at Bihin. But it may be 

 Neocomian. The single fossil found does not afford ground for an 

 opinion, though it resembles the Lower Cretaceous and Upper 

 Jurassic Cryptocoenice rather than the Bathonian species. 



It is to be hoped that the next traveller along the road to the 

 Sheikh Pass will endeavour to collect more fossils from the Duba 

 limestone. 



IV. Section across the Guban and the Golis. 



After having thus enumerated the specimens contained in the 

 collection, we may proceed to consider what light they show on 



1 Cyathophora Neocomiensis, E. de Fromentel, " Description des polypiers fossiles 

 de l'E'tage neocoruien," p. 41, pi. v, figs 11, 12. Paris. 1857. 



2 F. Koby, " Monographie des Polypiers J arassiques de la Suisse," pt. 2, p. 86, 

 pi. xxix, fig. 2 : Mem. Soc. pal. Suisse, vol. viii, 1882 (1881). 



