28 ARRIVE AT Simon's bay. 



(hence the name), and communicates to the animal a 

 slow rotatory movement while drifting before the 

 ^\ ind. Two kinds of Jantlimce (J, globosa and J. 

 exigiia^ molluscs with a fragile^ snail-like shell, and 

 a vesicular float, were drifting* about, and^ tog'ether 

 with a very active_, silvery-blue Idotea^ half an inch 

 long", preyed upon the Velellm, At another time^ 

 among- many other pelag^ic Crustacea, we obtained 

 three kinds of Urichthusy a g^enus remarkable for 

 the giassy transparency of its species, also HyalcBa 

 injlexa and H, tridentata, curious pteropodous mol- 

 luscs which swim near the surface. 



On March 8th, we anchored in Simon's Bay ; our 

 passag'e from Rio de Janeiro, contrary to expecta- 

 tion, had thus occupied upwards of five weeks, 

 owing* to the prevalence of lig'ht easterly winds 

 (from N. E. to S. E.) instead of the westerly breezes 

 to be looked for to the southward of lat. 35° S. 

 We were fortunate, however, in having* fine weather 

 during' the gTeater part of that time. 



The period of our stay at the Cape of Good Hope 

 was devoted to the construction of a chart of Simon's 

 Bay and its neig'hbourhood, which has since been 

 incorporated with the previous survey of Capt. Sir 

 Edward Belcher in H. M. S. " Samarang*," and 

 published Avithout acknowledg-ment. The requisite 

 shore observations were made by Capt. Stanley and 

 Mr. Obree, while Lieuts. Dayman and Simpson con- 

 ducted the soundino'. Our detention was leno-thened 

 by a succession of S.E. gales, and the state of the 



