376 ME. r. E. BEDDAED ON THE 



character of the nails are similar ; so, too, in Mr. Forbes's drawings ^ of 0. giUesini. 

 In the ' Voyage de I'Astrolabe ' the pes of 0. australis is figured as having five complete 

 digits, and Mr. Clark not unnaturally makes use of this character to distinguish betvreen 

 this species and his 0. forsteri. I feel certain, however, that five complete nails are 

 not found in any of the diflferent species of Sea-Lions with which w'e are at present 

 acquainted. The only evidence, in fact, for the presence of five complete nails is in 

 Quoy and Gaimard's figure ; and these do not, to my mind, bear the stamp of accuracy. 

 It is possible that the shape of the pes (and of the manus also) may present 

 characters of specific value ; the depth of the incisions between the toes, as well as 

 the relative sizes of the first and last toe, appear from the published figures to be 

 subject to some variation ; as, however, half of the figures extant are from dried skins, 

 it does not seem to me to be safe to base any discussion upon difierences in the 

 figures, which may present appearances unknown in nature. 



II. Visceral Anatomy. 



After the very laborious and complete account of the anatomy of the viscera in 0. 

 juhata which is to be found in Dr. Murie's memoir, I did not expect to be able to add 

 much to our knowledge of the structure of the Otariidce. 



I examined the viscera of 0. hookeri with much interest, because I wished to discover 

 whether that species was most nearly allied to 0. juhata or to 0. gillespii ; materials 

 for further comparison do not exist ; these two species only have been hitherto studied 

 by dissection. 



The tongue of 0. hookeri is bifid at the apex, like that of 0. juhata and 0. gillesj)ii, 

 and in other respects appears to agree with the same organ in these two species. 



The stomach is decidedly less globular than in the figures given by Murie ; the 

 measurements of the undistended viscus are as follows (they arc to be compared with 

 the accompanying measurements of 0. juhata) : — 



O.jubata. O. hookeri. 

 inch. inch. 



Length along outer circumference ... 31 21 



Length of lesser curvature 11 1-1. 



T cannot compare these measurements exactly with those of 0. giUesjjii ; but Forbes 

 distinctly states, and other measurements which he quotes support the statement, that 

 the stomach is considerably more elongated and less globular than in 0. juhata. It 

 appears, when comparing the measurements given by Forbes and Murie of the length 

 of their examples with the length of the stomach with my own measurements in 



' Trans. Zool. Soc. vol. si. pi. 1. tig. 2. 



