170 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



97. Narcinebrasiliensis (Olfers) Henle. " Tkembler." 



Xarcine brasiliensis Guxther, op. cit., viii, 1870, p. 453. 



♦320S2. One specimeu. S . 

 32082. One specimen 2 (much darker in color than the $ ). 



98. Rhinobatus undulatus Olfers. '• Sea Fiddler." 



Bhinobatua undulatus GI'NTHer, op. cit., viii, 1860, p. 444. 



*30001, S . One specimen. 



30017, $ . One specimen. 



*3001S, 2 . One specimen. 



99. Sphyrna zygaena (L.) Miill. & Henle. " SHO^^i:L-^•osE Shark." 



Zygivna malleus GrsTHER. op. cil., viii, IcTO, p. 381. 



2999S, 2 . One specimen. 

 *29999, S . One specimen. 



3.00. Carcharias terrae-novae (Eich.) Gthr. " Ground Shark" ; "Tiger Shakk" ; 



" White Shajeik." 

 Carcharias terr(F-nov(e Guxther, op. cit., viii, 1870, p. 360. 



29997. One specimen. S . 



30012. One specimeu. $ . 



30013. One specimen. 2 . 

 ♦30014. One specimeu. S . 

 *30059. One specimeu. 



30059. One specimeu. 



ON A NEW MUSKRAT, Xeofiber Alleni, FROM FLORIDA. 

 By FREDERICK W, TRUE, 31. 8., 



Curator of the Department of Mammals iv the U. S. Xatiotial Museum. 



Washington, June 30, 1884. 

 lu December, 1883, the Museum received from Mr. Wilham Wittfeld, 

 of Georgiana, Brevard Couuty, Florida, a small rodent which was im- 

 mediately recognized as differing from any species which had been 



hitherto described. I gave a brief account of it in Science for , 



1884, which I wish now to supplement by a somewhat fuller and more 

 technical description. 



New genus, XEOFIBEE. 



Skull and dentition as in Fiber. Feet normal; toes not bent laterally 

 at an angle with the sole ; tail, round. 



IS'ew species, Xeofiber Alleni. 



Neofiber Alleni, True, Science, lY, No. 75, 1884, p. 34. 



A muskrat of less than half the size of Fiber zibethicvs, but of the 

 same general form. Eyes small and high up on the head. Ears mod- 



i 



