296 G. C. Crick — Belemnitesfrom Somali-land. 



Parallelodon Egertonianus, Stoliczka. 

 Area, Everest, "Asiatic Eesearches " (Calcutta), 1833, vol. xviii, 



pt. 2, p. 114, pi. ii, fig. 27. 

 Cucullcea virgata, Blanford, Journ. Asiatic Soc. Bengal, 1863, p. 136 ; 



and Blanford and Salter, " Palaeontology of Niti, Northern 



Himalaya," 1865, p. 103 ; non J. de C Sowerby, 1840. 

 Macrodon Egertonianum, Stoliczka, Mem. Geol. Surv. India, 1865, 



vol. v, p. 89, pi. viii, fig. 7. 



Diagnosis. — II. testa oblique-elongata, convexa, angusta, costis radi- 

 antibus rugosis ornata ; costis ad marginem anteriorem paucioribus, ad 

 marginem posteriorem prope obsoletis ; slriis concentricis incvqualibns, 

 undulatis, interdumqne lamellosis. — Stoliczka. 



Shell obliquely elongate, convex, narrow, with radiating costa? ; 

 costse fewer towards the anterior margin and nearly obsolete at 

 posterior end ; concentric stria? unequal, undulating, sometimes 

 lamellose. 



Dimensions. 



Length 40 to 65 millimetres. 



Height .. 20 to 25 ,, 



Breadth 25 to 40 



Bemarks. — The Somali specimens exhibit the above characters as 

 given by Stoliczka. In addition it may be noted that a difference 

 exists in the ornamentation of the two valves. The right valves of 

 all examples, whether from Africa or India, show a series of inter- 

 mittent ribs between the prominent radiating costal, which are 

 entirely absent on the other valve, where the costa? are rather fewer 

 and wider apart. This is referred to because in his observations on 

 the species, Stoliczka merely states that the costaa "have usually no 

 intermittent ribs between them." The extensive ligamental area 

 is beautifully ornamented with numerous closely-set grooves. 

 Lastly, a curious lithological resemblance may be observed between 

 the Indian and African representatives of this species : both series 

 of shells are of a lustrous black colour, relieved in places by a 

 lightish-brown matrix. If the specimens from Niti in the British 

 Museum were mixed with those from Somali-land, it would be 

 somewhat difficult to separate them, so closely do they approximate 

 to each other in almost every detail. 



It is interesting to note, in conclusion, that Mrs. E. Lort-Phillips 

 has very kindly presented five of her best specimens of this species 

 to the Geological Department of the British Museum. 



III. — Note on some fragments of Belemnites from Somali-land. 

 By G. C. Crick, F.G.S. 



ALL the fragments appear to be referable to the same species. 

 There is not a complete specimen among them ; some show the 

 alveolar region, but the majority exhibit only the post-alveolar part, 

 and there is not an example with the apex preserved. 



Transverse sections of the guard show that the species here repre- 

 sented belongs to the group Canaliculati, as defined by Neumayr. 1 

 1 Verhandl. d. k.-k. geolog. Reichsanstalt, 1889, pp. 52-6. 



