123 



August 13, 1844. 

 Professor Owen, V.P., in the Chair. 



The follow'ing notes from Sir Robert Heron, on the Jerboas in his 

 collection, were read : — 



" June 14th, 1844. — The Jerboas vrere received into this mena- 

 gerie in June 1843. They are in a box fuU of cotton : the box is in 

 a room five and a half feet by four and a half, floored with \vood, and 

 warmed by a flue "vvhich has always been heated at night ; the room 

 opens into a pen secured with wire, nine and a half feet by eight and 

 a half. They have been oflered many kinds of food, but eat only 

 ■vvheat and lettuce ; they have never been seen to drink, but from the 

 water diminishing and their parting \vith a considerable ąuantity of 

 urine, \ve have no doubt of the fact. On the 14th of May lašt they 

 produced two young ones ; on the 12th inst. these young ones are 

 still bHnd and unable to walk, also nearly naked, but they are grown 

 and appear to be healthy : it is intended to make a pit in their abode 

 about two feet sąuare, fiUed with earth, where they may burrow. 



" June 29. — It was not till their fifth week that tlie young Jer- 

 boas appeared to have the use either of their eyes or limbs ; they 

 had still little fur, but \vere a good deal grown. Now, being forty-six 

 days old, they are about three-quarters grown, are well-clothed and 

 active ; they have been seen to eat corn, and are apparently quite 

 established. A second box has been put into their chamber, and lašt 

 night all four had removed into it. They have never been seen to 

 drink, but it is thought they do so, as the \vater is sometiraes di- 

 minished. 



" July 20. The young Jerboas are now exactly likę the old ones." 



The following extract was read from a communication from the 

 Right Honourable the President of the Society : — 



"1 have eight young Oroonoko gosliugs ; they are well-grown 

 birds and nearlv resemble the adults. I have also eight Tctrao Um- 

 bellus and two young Tetrao Cupido, and every prospect of hatching 

 the Stanley Cranes. The young Eland Antelope and the young 

 Common Zebrą are going on charmingly ; both the mothers have 

 again taken the malė, and my young Antilope scripta, not yet twelve 

 months herself, has done the šame." 



" Descriptions of new species of Arca, chiefly coUected by H. Cu'- 

 ming, Esq. in the Philippine Islands," by Loveli Reeve, Esq. 



Arca obtusa. Arca testd ohlongd, ModioUformi, lateribus oltuso- 

 rotundatis, margine ventrali bysso paululhm Mante ; alba, epider- 

 mide nigricante subsguatnosd partini iiidutd ; radiatim striatd, striis 



No. CXXXVIII.— Proceedings op thk Zoological Society. 



