LUTRA 361 



pm- in both size and form, the three teeth cutting against each 

 other when jaws are closed ; pm^ larger than the other small 

 jDremolars, its cusp less anterior in position, its crown decidedly 

 in wider posteriorly than anteriorly. Upper carnassial triangular 

 general outline, though this is somewhat obscured by the broadly 

 rounded inner portion and the somewhat projecting postero- 

 external lobe ; outer and jjosterior borders sub-equal and longest ; 

 trenchant portion of tooth with high anterior cusp connected 

 with well developed posterior cusp by a high, abruptly angled 

 commissure ; crushing portion nearly as wide as long, its area 

 about as great as that of trenchant portion, its inner border 

 noticeably I'aised at middle though without secondary cusps : 

 cingulum moderately developed along outer border of crown, and 

 forming a distinct though small antero-basal cusp. Lower 

 carnassial with anterior triangle well developed, the protoconid 

 and paraconid sub-equal, the metaconid somewhat smaller ; 

 crushing portion of crown wider than anterior triangle though 

 not so long, the areas of the two portions of the tooth 

 approximately equal ; hypoconid evident though not high, the 

 outer surface of its base in line with that of protoconid, the 

 inner surface continuous with the concave though scarcely 

 basin-shaped main portion of crushing area ; cingulum narrow 

 but evident throughout, not specially developed in region 

 bordering outer base of hypoconid. Second lower molar flat, 

 subteretft, slightly wider than long, the inner and outer margins 

 each with a small cusp somewhat behind middle, the cusps joined 

 by a low transverse ridge. Upper molar about equal to carnassial 

 in crown area, but length of its outer border decidedly less than 

 that of preceding tooth ; crown slightly constricted near middle, 

 the outer portion bilobed, the anterior lobe bearing a low paracone 

 and a broad outer projection representing the parastyle, the 

 posterior lobe bearing a low but robust metacone ; inner portion 

 of crown with a large protocone and low hypocone, the former 

 sending forward a conspicuous commissure to base of paracone, 

 the latter connected with cingulum that extends around base of 

 protocone. 



Measurements. — Adult male from Warwickshire, England : 

 head and body, 712 ; tail, 495 ; hind foot, 134; ear, 28. Adult 

 female from Csehtelek, Hungary : head and body, 640 ; tail, 380 ; 

 hind foot, 115; eai", 22. For cranial and dental measurements 

 see Tables, pp. 362, 363. 



Specimens examined. — -Tliirty-three, from the following localities : — 



Ireland : Londonderry, 1 (type of rocnsis) ; Ahascragh, Co. Galway, 1. 



England : Pembrokeshire, 1 ; River Stoiir, Dorsetshire, 1 ; Rugby, 

 Warwickshire, 1; Norfolk, 1; no exact locality, 1. 



Norway : Egersund, Stavanger, 5. 



Sweden : Jockmock, Lappmark, 1 (Stockholm) ; Gnesta, Soderman- 

 land, 1 (Stockholm) ; Skaue, 1 (Stockholm) ; no exact locality, 2. 



France: St. Gilles, Gard, 1 (Lataste) ; Etupes, Doubs, 1 (Mottaz). 



Germany : Southern Germany, 2. 



