Hoijal Societij. 459 



pressed in small numbers; as for instance, less than 100, in 

 either of its terms. Both these operations, Mr. Goodwyn's 

 Tables are calculated to perform by mere inspection ; and in the 

 latter particular, especially, to save much time to calculators, as 

 well as secure greater accuracy to their results. 



But Mr. Goodwyn goes a great deal further, as the title of 

 his intended work imports ; viz. a " First Centenary of a Series 

 of complete Decimal Quotients ;" because, this Tal)le will admit, 

 the taking out hy inspection of the complete value in each case 

 of every fraction between V^- '^"'^ H J ^^^^ i^* ^^^^ ^^ •]"*">' 

 places of decimals, as is requisite, either for the same terminat- 

 ing or circulating, as the case may be : showing all the various 

 decimal circles belonging to each division under 1025. 



The elaborate Tables of the same kind, intended to follow, if 

 the present intended ones are favourably received, will carry 

 .Mr. Goodwvn's series of complete decimal quotients, to fg^; 

 or even to 4^f, the present extent, as I understand, of his 

 tjuly laborious and curious calculations. An Introduction is in- 

 tended to explain and show examples, of all the various uses of 

 the Tables. 



CVII. Proceedings of Learned Societies, 



ROYAL SOCIETY. 



June 5. A PAPER by Dr. Leach, of the British Museum, was 

 read, containing some observations on a new genus of marine 

 animals inhabiting the argonaut and nautilus shells. It was ob- 

 served by Sir Joseph Banks, that the animal found in these shells i^ 

 not the fabricator of them, but a parasite which has taken up its 

 occasional abode there when it chooses to shield itself from the 

 direct action of the waves. This ingenious opinion has been pro- 

 mulgated several years; but no direct confirmation, or grounds for 

 rejecting it, had hitherto fallen under the observation of na- 

 turalists. The late expedition to the Congo river has enabled 

 Dr. L. to verify the truth of the learned President's observation, 

 and furnished him with an opportunity of examining minutely one 

 of these animals, and ascertaining to' what genus it properly be- 

 longs. He described the means by which the animal attaches 

 itself to the empty argonaut shell, the manner it leaves and re- 

 turns to it, and the organs necessary for such migrations. 



Sir E. Home, hart, also presented a paper somewhat similar, 

 detailing his remarks on the mode and period of generation ot 

 the animals found in nautilus and argonaut shells. He found 

 ihtni to be oviparous animals, to be nourished nearly like snails ; 



»nd, 



