446 MR. E. T. NEWTOX ON NEW MAMMALS FROM 



2. Ltjtra Eeevei, sp. nov. (PI. XYIII. figs. 2 a-2 c.) 



One of the most remarkable teeth which I have seen from the 

 British Crags was found by Mr. James Reeve, in the lower beds of 

 the Norwich Crag at Bramerton. This tooth (fig. 2), though small, 

 is in a most perfect state of preservation ; and, being a germ-tooth, 

 the cusps are entirely free from facets of wearing ; it consists of the 

 enamel cap, with a layer of dentine supporting it within, and con- 

 sequently the crown may have a less altitude than it would have 

 had in the completed tooth. The length from before backwards is 

 20 mm., the width 10 mm., and the height 4 mm. In general 

 contour the tooth is nearh; parallel-sided ; one end is flattened and 

 the other bluntly pointed ; the half corresponding to the pointed 

 end is occupied by three cusps of nearly equal size, while the other 

 and somewhat smaller half has a broad depressed space, with a 

 cusp on one side and a ridge on the other ; the cusp being a little 

 smaller than either of those at the opposite end of the tooth. 



The various species of Otters exhibit considerable differences in 

 the form of their teeth ; some, such as the Indian clawless Otter 

 (Lutra cinerea), having broad and low-crowned teeth, of a type 

 somewhat similar to the fossil iiow under examination ; while others 

 have narrower teeth, with the anterior cusps higher, and sometimes, 

 as in the L. hessica lately described by Mr. E. Lydekker*, the three 

 anterior cusps are equally developed. 



Mr. Lydekker has kindly examined the x^orwich-Crag specimen, 

 and is of opinion that it belonged to a Lutrine species of a very 

 brachyodont type, probably nearly allied to the Lutra sivalensist, 

 which also has broad-crowned teeth. Unfortunately, however, the 

 only known example of a lower jaw of this Sivalik species has a 

 very imperfect carnassial. 



It would seem, therefore, that this Xorwich-Crag tooth is a right 

 lower carnassial of an extremely low- crowned type, with strong 

 Lutrine affinities ; and, accepting Mr. Lydekker's opinion, it is pro- 

 visionally placed in the genus Lvtra. 1 propose to name the species 

 L. Eeevei, as an acknowledgment of the services rendered to science 

 by the worthy Curator of the Norwich Museum. 



3. Phoca Moori, sp. nov. (PI. XYIII. figs.* 3 a, 3 6.) ■ 



Mr. E. C. Moor has a small left humerus of a Seal (fig. 3), wanting 

 the lower articulation, from the nodule-bed of the lied Crag near 

 Woodbridge. It agrees in form most nearly with the corresponding 

 bone of Flioca vitulinoidefi, described by Prof. Van Beneden J ; but 

 differs in being much smaller and of more slender proportions, the 

 shaft just below the deltoid crest being especially small. Since 

 there is no reasonable doubt that this humerus represents a new 

 specific form, I propose to associate it with a name which has for 



* Proc. Zool. Soc. 1890, p. 3. 



t Pal. Indica, ser. 10, voLnI. p. VX^, pi. xxvii., iuid pi. xlv. fig. 3 (1884). 



X Ann. Mus. Roy. Belg. vol. i. pt. 1, p. 72, pi. 15 (1887). 



