298 PEOP. W, B. BENHAM ON THE [Apr. 2, 



the epiglottis ; in other cases, as in Man, they are more strictly- 

 lateral in position, lying in all cases between the " true " and 

 "false" vocal cords, when both are present. In Man, each 

 " ventricle " extends upwards, intervening between the aryteno- 

 epiglottid and the tliryo-epiglottid. 



In some Monkeys, in addition to their lateral pouches, there is 

 a smaller or larger (e. g. Mycetes) median pouch ; but in all these 

 cases, the pouch or pouches lie above the thyroid cartilage, either 

 actually or morphologically. 



Only in the Mystacocete ', apparently, do we meet with a post- 

 thyroideal pouch. It seems to me this must be distinct from the 

 preceding. Naturally, I write with considerable hesitation in the 

 face of the views of such well-known authorities on the Cetacea 

 as those quoted above ; but I cannot think that the median post- 

 thyroideal sublaryngeal pouch of the Mystacocete is truly and 

 genetically homologous with that of the Odontocete and other 

 mammals — whether median or lateral — which is pre-thyroideal. 



Heferences to Literature, 



Owen. — " On some Indian Cetacea." Trans. Zool. Soc. vi. 1865, 



p. 17. 

 Von Haast. — " On the Occurrence of a new Species of Euphysetes 



{E. pottsii) on the Coast of New Zealand." P. Z. S. 1874, 



p. 260 ; and Trans. New Zeal. Instit. vi. 1873, p. 97. 

 Caete & Macalister. — " On the Anatomy of Balcenajytera." 



Phil. Trans, p. 158 (1867). 

 Y. Delage. — " Hist. d. Balcenoptera musculus." Arch. d. Zool. 



Exp. et Gen. iii. 1885. 

 Turner, W. — " The Lesser Rorqual (B. rostrata) in Scottish Seas, 



with Observations on its Anatomy." Proc. R. S. Edinb. six. 



1892. 

 Dubois. — " Ueber d. Larynx " (in Max Weber's ' Stud. lib. Sauge- 



thiere '), 1886. 

 EscHRiCHT & Eeinhaedt. — Eay Society's Memoir — 1866. " On 



the Greenland Right "Whale {Balmia mysticetiis)" 

 Owen.— Comp. Anat. Phys. of A^ertebrates, vol. iii. 

 Howes, G. B. — " On some Points in the Anatomy of the Por- 

 poise." Journ. Anat. & Physiol, xiv. 1879, p. 467. 

 Cleland. — " On the Viscera of the Porpoise and White-beaked 



Dolphin." Journ. Anat. & Physiol, xviii. 1884. 

 D'Aect Thompson.—" On the Cetacean Larynx." Studies, Mus. 



Dundee, i. p. 1890. 

 Kanthack, a. — " The Myology of the Larynx." Journ. Anat. 



& Physiol. 1892, p. 279. 

 MuEiE.— " On the Organization of the Caa'ing Whale (Olobio- 



cephalus melas)." Trans. Zool. Soc. viii. 1867. 

 MuEiE.— "On Eisso's Grampus." Journ. Anat. & Physiol, iv. 



1871, p. 118. 



^ But, according to Owen (iii. p. 598), there is, both in Jteles oracfmoides 

 and in Hapale rosalia, a " small saeeulus" which " i^rojects from the crico-thyroid 

 space." 



