FOEAMINIFEEA OF THE KEEIMBA ARCHIPELAGO. 369 



Station XI. (Label) " Manangoroshi Point to Lurio Point. Reefs." 



A light bro-nrn sand, chiefly composed of rounded and water- worn coral-fragments, shell- and nullipore- 

 debris. Not much fine material or mineral sand. Bulk of material after washing : — 188 cc. 



Coarse material .... 10 cc. (Clean, rounded gravel, composed of coral-, shell-, and nullipore- 

 debris. Large adherent forms of Poraminifera, Homotrema, 

 Polt/trema, Gypsiria, Placopsilina, etc.). 

 Heavy „ .... 140 cc. 

 Elutriated ,, .... 30 cc. 

 Floated „ .... 8 cc. 



This sample covers a long range of inshore reef-gatherings. The whole coast is 

 protected by Foomo Island, Kizeeva Island, and Arimba Head, which is peninsular. 

 Between Kizeeva Island and the mainland is a narrow channel with 4 fms. of 

 water at deepest, and between Poomo Island and Manangoroshi Point the channel is 

 only J fm. deep at low water. Species and varieties =262. 



Station XII. (Label) " Lurio Point to North Point. Exposed coast. 85 fms." 



A brown-grey sand, chiefly angular and siliceous. Eulk of material after washing : — 533 cc. 



Coarse material .... 140 co. (Shell- and nullipore-debris. Orbitolites and a few adherent forms, 



Gypsina, Polytrema, Hyperammina, Haddonia, etc.). 

 Heavy ,, .... 360 cc. 

 Elutriated ,, .... 25 cc. 

 Floated „ .... 8 cc. 



A rock-bound coast with deep water (comparatively) close to shore. The deepest 

 dredging in the material supplied to us. At two miles from shore no bottom was 

 found. In this dredging, Textularidae and Miliolidse were exceptionally numerous. 

 Species and varieties =201. 



Station XIJL (Label) " Pemba Bay. Bottom :— Muddy. 10-20 fms." 



The original gathering from this station was lost, but Dr. Simpson obtained a second sample. This 

 was a highly organic, blue-green mud, very foul, and with little trace of calcareous material. Eulk of 

 material after washing : — 899 cc. 



Coarse material .... 35 cc. (Shell-fragments and large angular sand). 



Heavy „ .... 840 cc. (Fine grey sand). 



Elutriated „ 20 cc. 



Floated ,, .... 4 cc. 



The sample was obtained through the courtesy of the Secretary of the Companhia 

 do Nyassa, and was no doubt gathered under different conditions from the original 

 sample, being apparently mud gathered from the anchorage at Pemba. Species and 

 varieties =97. 



Pemba Bay is a large natural harbour entirely land-locked, with a narrow entrance 

 between North Point and Herbert Point. The entrance is sheltered by a peninsula 

 culminating in Maunhane Point. The material was principally noteworthy owing to 

 the occurrence of fossil Poraminifera in considerable numbers. {Vide Appendix B, 

 p. 383,) 



