PLATE XXIV. 



SIZE. 



TIG. 



1. Cavia aperea 1 (nearly ripe embryo). Right scapula, outer, and Sternum, 



inner view . 4| diam. 



2. Do. (another, at same stage). Fore-part of Sternum ; inner view . do. 



3. DO. (do,) Part of same ; outer view do. 

 4 Do. (1st embryo). Right epicoracoid and 1st rib ; outer 



view . 9 3 do. 



5> Do. (do.) Left epicoracoid and 1st rib; inner 



view . "- 



6 Do. (a month old). Right scapula, outer, and Sternum, 



inner view . ^-3 - 



7 DO. (do.) Clavicle and cartilages . 2f do. 

 8. Dasyprocta acoucki* (adult). Prae-sternum ; lower view 



9 Arvicola agrestis* (almost ripe embryo). Sternum and part of Shoulder- 

 girdle . 15 do. 

 IQ Do. (3 or 4 days old). Right scapula, outer, and Sternum, 



inner view . 6 do. 



H DO. (do.) Right scapula ; inner view do. 



12 Do. (do.) Prae-sternum and epicoracoid ; up- 



per and lower views -12^ do. 



13 Do. (do.) Commencement of xiphisternum ; 



upper and lower view . 13^ do. 



14. Arctomys ludovicianus* (adult). Right scapula, outer, and Sternum, inner 



view . nat - s ^ ze - 



15 Do. (do.) Scapula, posterior view, and fore-part of 



Sternum, lower view do. 



16 DO. (do.) Section, showing relation of omosternum to 



clavicle and prse-sternum 3 diam. 



1 See pp. 207210. 3 See pp. 207210. 3 See pp. 207210. 4 See pp. 207210. 



