MONOTREMATA. 
Mamm. 37 
Ornithorhynclius , lactation and shoulder-girdle, Sixta, Zool. Anz. xxii, 
pp. 246 and 329. 
Echidna hystrix , fenestra cochleae, Eschweiler, Anat. Anz. xvi, p. 584 ; 
development of nasal and buccal chambers, Seydell, Denk. Ges. 
Jena, vi, Semon’s Reise, iv, p. 447; thymus and throat-clefts, Maurer, 
t. c. p. 405, and Prexant, Anat. Anz. xvi, p. 572. 
IN CERT EE SEDIS. 
\ Hemiomus, n. g. for II. major, n. sp., fossil, Tonbridge, Seeley, Quart. J. 
Geol. Soc. lv, p. 413. 
