245 



voyage was in the northern end of the Gulf of Suez, T0393 (re- 

 duced). 



Prom lat. 27 to 25 N., temperature 24 to 28 C. : reduced sp. gr. lv 315. 

 From lat. 22 to 14 temperature 30 to 31-5 C. : reduced sp. gr. 1-0306. 



Straits of Bab-el- Mandeb. The water of the Gulf of Aden being 

 less dense, though colder, than that of the Red Sea, flows into the 

 latter on both sides of the Island of Perim. This colder water could 

 be detected half a degree north of the Straits. After some further 

 remarks about this current, the authors pass on to the 



Arabian Sea in which they found 



From long. 44 to 50 East from Greenwich, temp. 28-8, reduced sp. gr. 1-0275. 

 From the merid. of Cape Guardafui to Bombay, temp. 27 to 28, red. sp. gr. 1-0278. 



II. A paper was in part read, entitled " On the Structure, Func- 

 tions, and Homology of the Manducatory Organs in the 

 Class Rotifera." By P. H. GOSSE, Esq. Communicated 

 by THOMAS BELL, Esq., V.P.R.S. Received January 5, 

 1855. 



