474 PKOCEEDINGS O^ ^NITED STATES NATIONAL MUSEUM. 



20. Chimasra Colliei Bennett. 



29123 (91). $. Safety Cove, Brit. Col. Aug. 4, 1881. 

 Length, 19 inches. 



30. Raia binoculata Girard. 



29805 (92). (Head.) Safety Cove, Brit. Col. Ang. 4, 1881. 

 29804 (108). (Head.) Wrangel, Alaska. Aug. — , 1881. 

 Teeth of iirst, \% ; of second, \\. The second is a much larger indi- 

 vidual than the first. The first was caught in 16 fathoms. 



31. Squalus acanthias Linu. 



29121 (79). i. Drew's Harbor, Brit. Col. July 27, 1881. 

 29122(81). $. Menzie's Bay, Brit. Col. July 31, 1881. 

 29120(101). 9 . Eed Bay, Alaska. Aug. 14, 1881. 

 Length of 29121 is 2^ feet. No. 29122 is 21J inches long. 29120 is 

 29 inches long. The snout of the female is more obtuse than in the two 

 males. All of these specimens have a low keel along the lower margin 

 of the caudal peduncle from the end of the second dorsal to the root of 

 the caudal, just as in Atlantic specimens. 

 These three dogfish were caught in 12, 5, and 12 fathoms, respectively. 

 United States National Museum, 



January 31, 1882. 



OIV THE BARE RODEIVT, CRICETODIPUS PARVUS (BAIRD) COUES. 



BY FREDERICK W. TRIJE. 



At the time when Dr. Elliott Cones published his valuable mono- 

 graph of the Saccomyidce* the United States National Museum pos- 

 sessed but four specimens of the species Cricetodqnis parvus Baird — tvro 

 of them in bad condition — including the single type-specimen of Pro- 

 fessor Baird. On account of this scarcity of material he was forced to 

 speak very cautiously regarding the animal, leaving it uncertain whether 

 it was a distinct species or merely a variety of C. jianus Baird. 



In an interesting collection of rodents in alcohol, recentlj^ received into 

 the Museum from Mr. Gustav Eisen, of Fresno, Cal., I found nine addi- 

 tional specimens of this doubtful species, seven of which are in perfect 

 condition. A careful examination of these has convinced me that C. 

 parvus is a distinct species. The averages at the bottom of the follow- 

 ing table of measurements, compared with those given by Dr. Coues for 

 C. flavus,] bring out, I think, very clearly the characteristic differences 

 of the two species. 



"• Cones. Report, U. S. Geol. Surv. of tlie Territories, xi, 1877. Mouograpli VIII, pp. 

 481-542. 



t Coues, 1. c, Yf. 518. 



