628 ON TBI) STliUOTUBE OF THE LAliVAL POLYFrj-JHUS. [DeC. 17, 



Bimmsions of the slcull of Enhydrictis in millim. 



Basilar length (henselion) 99-0 



Upper length 97"6 



Cranial breadth behind Kygomatic arches and ^, 



above meat, audit 52*5 



Greatest breadth 66"0 



Breadth of occiput ca. 6.0"0 ■ . 



Interorbital breadth 28-5 



Breadth between procc. postoi'b. . . . . . . . . . 33*0 (!) ■ ;, 



. ~ Breadth between outer margins of alveoli :o£ ' ^ r - 



- upper canines .'. . . . . ............ .....' ca,.26;0- , .. ■ 



]Palate length ... . . .'.'.. .'. . . . . ..'..-. .'.V. •.ca."'0.4'''O , . • ',-• 



■ . Length from anterior margin of alv. of upper 'V ■ 



canine to post, margin of alv. of m. 1 ... . ca. 32"5 



Length of sagittal crest ca. 63*0 . . 



Height of mandibular ramus between p. 1 



and m. 1 . :. , ll*0 



1 conclude with a general remark on tlie Pleistoceue Mammalia 

 of Corsica and Sardinia. They are essentially the same in both 

 islands and, with the exception of the Mouflon, I have hot met 

 with a single recent species amongst the fossil forms. This- i-s 

 -as muoh as to say that, so far as the Mammals are concerned, I 

 canaot endorse the following statement by Deperet, referring to 

 the Corsican Pleistocene fauna : — " Le cSLraetere quatemaire de 

 I'ensemble de cette faune ressort deja de la presence d'un grand 

 nombre d'especes actuelles, telles quele Loir, le Mulot, le Lievre, 

 le Mouflon de Corse, I'Aigle pygargue"\ On this topic I «hall 

 have something more to say at an early opportunity i 



Mr. Budgett read a paper on the Structure of the Larval 

 Polypterus, in which he described the urino-genital system and 

 skeleton of a very young larva 30 mm. in length. The following 

 is an abstract of this communication : — 



' The pronephros, consisting of the greatly coiled anterior end of 

 the archinephric duct, was very large and lies close under the skin 

 On either side behind the gills ; the coiled portion of the pronephros 

 communicated with a small pronephric chamber at the side of the 

 dorsal aorta by a very fine duct, the extreme anterior end of the 

 archinephric duct. The chamber contained at this stage a very 

 small glomus and did not appear to communicate with the body- 

 cavity. The pronephros of Polypterus closely resembled that 

 of Amia. 



The laesonephros in the hinder end of the body was simple, 

 consisting in each segment of a glomerulus, from which there 

 passed a short broad nephrostome-canal opening into the rudiment 

 of the genital duct and a coiled kidney-tubule ending in the seg- 

 mental duct. ' -. 

 1 02). elf. p, 122. 



