Linnaan Society. 517 



Hab. Island of Camiguing, Philippines (found under stones at low- 

 water) ; Cuming. 



The leading feature of this species, and which is especially promi- 

 nent in young specimens, is its peculiar star-lU-ce display of tubercles ; 

 the concave flatness of the spire is also remarkable. 



10. Delphinula cidaris. Delph. testd suhgloboso-tnrbinatd, soli- 

 dd ; anfractibus transversim et longitudinaUter tuber culato-costatis, 

 costis longitudinalibus majoribus, prominentioribus ; anfractuum 

 parte inferiori foraminosd. 

 Conch. Icon. Delphiniila, pi. 5. fig. 27. 



Hab. Calapan, island of Mindoro, Philippines (found in coarse 

 sand at the depth of ten fathoms). This is the roundest and most 

 solid species of the genus. 



LINN^AN SOCIETY. 



January 16, 1844. — E. Forster, Esq., V.P., in the Chair. 



Read an extract from a letter addressed by John Ashton Bostock, 

 Esq., Assistant Surgeon in H.M. 3rd Buffs, to his father John Bos- 

 tock, Esq., M.D., F.'L.S. 



The letter is dated Agra, Oct. 21st, 1843, and describes the oc- 

 currences of a journey from Allahabad. The extract is as follows : 

 ' ' Between Cawnpore and this place I witnessed one of the extraor- 

 dinary phsenomena peculiar to tropical climates, viz. a flight of locusts. 

 The direction of the flight was nearly due east, and the rate four miles 

 per hour ; and you will form some idea of the immense host, when I 

 tell you, that travelling at the same rate and in the opposite direc- 

 tion, I was between two and three hours in passing through them. 

 During the whole time, the horizon, as far as the eye could reach, 

 was darkened, and every nearer object was obscured. On looking 

 directly upwards the appearance was that of a verj'- heavy snow- 

 storm, and the ground, which was covered by them, resembled the 

 fields strewed by the dried leaves of the autumn. Several of them 

 flew into my Palken. They were 2^ inches long, of a pink colour, 

 marked with dark brown. The poor natives were shouting and en- 

 deavouring to prevent their devouring the crops, to which they prove 

 most destructive," 



Read also a continuation of the series of memoirs on the Radiata 

 of the Eastern Mediterranean. ByE. Forbes, Esq., F.L.S., Professor 

 of Botany in King's College, London. 



The memoir now read relates to the order Echinidce, the Mediter- 

 ranean species of which Professor Forbes states to amount in num- 

 ber to between twelve and fifteen. Of these nine occur in the seas 

 of the Egean Archipelago, at various depths, some being found as low 

 as a hundred fathoms. They are enumerated as follows : — 



Fam. Spatangace^. 

 Gen. Spatangus, L. 

 Spatangus purpureus is rare to the east of the Morea, but more 



