Report upon the Anatomy and Embryology of the Penguins collected by 

 the Scottish National Antarctic Expedition, comprising: (1) Some Features 

 in the Anatomy of the Penguin ; (2) The Embryology of the Penguin : A 

 Study in Embryonic Regression and Progression. By D. Waterston, M.A., 

 M.])., K.U.C.S.K, and A. Campbell Geddes, M.D. (From Hi.- Laboratory of 



the \liatomic:d Department, The 1 ' III vcrsit y, Iv lilil Mir- ll. | ( \V it ll Til ive 1'lai. 



IMS. received Maivli II, limit, i;,.,,] February ::. lints, i ... i, 1 1, I,,I,,T ji. 



Among the specimens collected by the Scottish Xational Antarctic Expedition and 



brought, hack to this country was a scries of tin- embryos df penguins of various species, 



collected at different stages of development by Mr II. X. l!i HMOSK I'.uowx and Dr. I. II. 



TlAKVKV 1'lKlK. These embryos Were, for tin- ^re;iter p:irt, of the species CeiltOO 



(/'//(/o.vrr7/x /mpufl, Forst.), the remainder of the species Addia (/'//// ixcc//x ml,'li<r, 



llonihr. andJacq.). Two Emperor penguins, whieli liad Iteen preserved for examination 



by the injection of the hi l-\cssds, were also liroii;jhl I ie. Throiiuh the kind- 

 ness of l>r \V. S. r.Ki'CK these specimens were entrusted to one of iis ( I >. \V.) for 

 exaiiiiniilioii and report, hut as the work involved in this proved to he very 

 extensive, Dr A. CA.MIT.KLL GEDDES was asked to undertake, a share in it, and this 

 he agreed to do. 



This report contains the results of the combined investigations. 



PART I. 



ON THE ANATOMY OF TIIK ADULT PENGUIN. 

 INTRODUCTORY. 



Upon the return of the CliH<'n<i< /' Expedition to this country, t he late Pmf.-s.ir 

 MORRISON WATSON had handed over to him the valn.-iUe culleetion of adult penmiins 

 which had been made. Upon these he based his classical memoir, " A I.Yport on the 

 Anatomy of the Spheniscidse collected during tlie \'o\a^c of 1 1. M.S. Challenger" 

 (('/i<il/f'iii/<-i- /'('ports, vol. vii. p. 1 ). To that report little, if anything, can he added. 

 There are, however, two points which a detailed dissection of the adult penguin has 

 brought to light, which seem to us to be worthy of heinv.; placed on record. 'These are, 

 first, the peculiarities of the cervical portion of the \crtehr.-d column ; second, some, points 

 in connection with the arrangement of the fascial layers in relation to the pectoral 

 muscles. In all the other points illustrated hy our dissections we can merely cnrroho- 

 rate the description given by Professor WATSON. 



(nun: i vi' ion INI [BANBACriONB "F mi: UUYM ' IMI.. I'AKi ll., I'l 1 . -2 :', L'll.) 



