ON TIIK SI'ATl'S III' illKi.iiNIA 1 1 K I'K KSSA KI.'Y. 1<!7 



.M.-Ciillocli"' .sc|i;n'MttMl (lie ifcniis Snhilar IVoiii I ' li,'l ,ui 1 n as 

 tollows: '■ l''r()m tliiti l;i'iiiis, Ii(i\vc\ it. i( is scpiii-ilfd liv llie 

 tiifft'ii'iit ;iniini.'('int'nl nl' tlic sliiclds of I lie licad, ami tlitf 

 distiiictlx paiit'd nurlial. AImi llif ii|i|)ci' sliitdds < d' hotli liead 

 and l»i>d\ liavccarli a lari^c s\ imiim'I lica 1 ai'cida placci] ratlier 

 litdiiiid I lu'ii' ccnl fi'S." 'I' lie most iiii|Miita iil (if t Iicm' (dia racters, 

 tin' [laiii'd iiiudial, \\h' ihi\v know to Itc imdiistaiil. 1 1^ is not 

 [MH'Sfiit 111 aii\ ol ( iaiinairs exam pK's. In tlic lour A usti'a.liaii 

 Museum specimens it is divided in the type alone, wliile Mr. 

 Lono-man intoi'ins me it is paired only in two cases out of tlie 

 si.x; in tlie Queensland Museum. 'IMie head sliiedds do not differ 

 fiuidanientall V Iriun those of i'. iiiiidn^^, the most impoiiant 

 differences hcini;- the larj^'cr siipi'aocii lai' in ' '. ilrpi-f.^.-in and the 

 pi'esence of onl\' three'-' posioculai' scales instead of four oi- 

 five. 'I'lie areolated sliields of the youny, and the soft, iiiteuu- 

 mentar\ coverin<^' of t lie ha lf-L;i-o\\ n specimen, ai'e g'ood dis- 

 tinguish inf>' cliaracters, and may prove of generic value when 

 further adult material comes to liiiht. 'The rounder outline, 

 the deeper nindial i)a\, and the I'eHexed mar^-inals, ttJgelher 

 with the piedoniiiiance of wrinkle<l skin on the flippers, ai'e, 

 without anv knowledge of the adult condition, good specific 

 characters only. The differences noted in the jaws of the two 

 foi'nis by Dr. Uaur-"are not present"^! in my specimens. The 

 single young skull available to nie (see post and Hgs. 4-7a-b, 

 •iSa, and -iOf) divei'ges considei'ably from that of ( '. iin/diin, but- 

 hei-e again we ai-e in ignorance of tlie true adult chai-aotei's. ]t 

 will thus be seen that the re-discovery of the adult is very 

 desii-able, foi- on its condition hinges the whole question of tlie 

 validity of the genus Xntnhir. Meanwhile, however, in the 

 absence of any established features on wliicdi to characterise 

 that genus, it seems best to regard it as synonynious with 

 i'/iehiiiiif. In tliis view Mr. McCulloch concurs with me. 



'8 McCulloch— Rec. Austr. Mas., vii., 1908, p. 126. 



i» Garman— Bull. Mus. Couip. ZuuL, vi., 18H1, p. 125 gives the 

 " postorbitals " as 3-4. 



•■^'J Baur— Amer. Nat., xxiv., 1890, p. IW. 



-1 I think it is possible that the produced lioniy slieatii of the lower 

 jaw, which would he present in a stuffed specimen, is tlio real cause of 

 Dr. Banr's remarks. On the removal ot this however, the jaws are 

 almost identical with those of C. mydai>. 



