Miscellaneous. 247 



superior incisor is elevated and terminated by a single point ; the 

 second, lying outwards, is low and projects but little from the gum. 



The ears are rounded quadrangular, entire, margined, clothed 

 with short hairs within ; the outer margin terminates sharply a 

 little behind the angle of the mouth, and bears there a distinct lobe. 

 The auricle is bent inwards, rounded at the apex, broadest below the 

 middle, and furnished with a small notch at the base. The metacarpal 

 joints of fingers 3 to 5 differ but little from each other in length. 

 The wing-membranes are thin, naked, and adherent as far as the 

 roots of the toes. The interfemoral membrane encloses the tail as 

 far as its apex, and is sparingly furnished with hair both above and 

 below to the end of the first third. The spur bears a distinct mem- 

 branous lobe. The penis of the male is provided with a bone. 



Pale brown, the hairs of the back rather darker at the base ; 

 wing-membrane dark brown. 



Measurements of an adult male. 



metre. 



Total length 0-092 



Head 0-016 . 



Entire elevation of ear 0*015 



Anterior margin of ear 0-010 



Breadth of ear 0-0125 



Length of auricle 0-007 



Length of tail 0-042 



Humerus 0-024 



Forearm 0-0365 



Length of fingers : — 



1st metacarpal, 0-0025 ; 1st phal. 0003 ; 2nd ph. 0-0025 0-0075 



2nd „ 0034 ; „ 00004 0038 



3rd „ 0-035 ; „ 0-015; 2nd ph. 0-0185 ; Cart. 0-005 0-076 



4th „ 0-034 ; „ 0011; „ 0-0105 „ 0-002 0067 



5th „ 0033 ; „ 0010; „ 0006 „ 00015 0-049 



Thigh 0-018 



Leg 0-018 



Foot 0007 



Spur 0-017 



Monatsb. Bed. Akad. Wiss. Dec. 7, 1868, p. 626. . , 



Nudibranchs in Fresh Water. 



Mr. Kent described, at the last meeting of the Zoological Society, 

 a new Nudibranch under the name of Embletonia Grayii, discovered 

 in the Victoria Docks at Kotherhithe. When I mentioned the cir- 

 cumstance to Dr. Mobius at Kiel, he observed : — 



" It was very interesting to me to find that a mollusk of the 

 family ./Eolididse had been discovered in brackish water near London 

 Bridge. In the Baltic Sea, Embletonia pallida extends as far as 

 East Prussia, near Konigsberg, where the water has only 7 of salt 

 in 1000. In like manner, Protolimax capitatus (=Limapontia nigra) 



