)-<>.] rRoc?^:EDiNC!s OF ijmtp:d states national museum. 73 



iiculatus^ Ivisso. The later name, Gohiesox mceandricus, (Girard) should 

 therefore be used instead of Gohiesox reticulatus. 



5. Cyprinus americanus^ Linuieus, in the Tenth Edition of the Systema 

 NatursB is a Menticirrus, while the species of the same name in the 

 Twelfth Edition is a Notemigonus. The name N'otemigomis americamis. 

 based on the latter, should thus give way to Notemigonus hosvi, (Cuv. & 

 Val.), or better Notemigonus ohrysolencus bosci. 



(). Catostonms earpio, Rafinesque, an Ictiohus, has priority over C. ear- 

 pio, Cuv. & Viil., a Moxostoma, The latter species having no synonyms, 

 may receive the new name of Moxostoma vale^iciennesi instead of Moxo- 

 stoma earpio. 



Indiana University, March 4, 1885. 



DESCRIPTION OF A NEW SPECIES OF PLECTROMUS ,P. CRASSI 

 CEPS) TAKEN BY THE UNITED STATES FISH COMMISSION. 



By TARViETOIV H. BEAN, 



Curator of the Bepartment of Fislies. 



Of this new species a single example, number 33553, was obtained in 



the greatest depth explored by the Albatross (2,949 fathoms) ; it is only 



48 millimeters long, and in very l>ad condition. Fortunately the same 



vessel took three larger and better preserved individuals of the same 



species, which are numbered 33378, 33509, and 34835, respectively ; these 



are from stations 2075, 2094, and 2106, the depths being 855, 1,022, and 



1,497 fathoms. The large examples are made the basis of the description! 



which follows : 



Plectromtts crassiceps; n. 8. 



'S.i'^76. 1 speciiueu : latitude 41'^ 40 ;10" N. ; longitude 65° 85' W. ; September 3, 18do. 

 33509. 1 specimen ; latitude 39° 44' 30" N. ; longitude 71° 04' W. ; September21, 1883. 

 34835. 1 speeimen : latitude 37° 41' 20" N. ; longitude 73° 03' 20" W. : Nov. 6, 1883. 



The species resembles Melamphaes megalops, Liitken, from which it 

 difterii in having a much smaller eye, larger scales, and shorter ven- 

 trals. (Dr. Liitken's species, which he referred only after much hesita- 

 tion to Melampliaes, is, in all probability, congeneric with Plectromus 

 suborbifalis, Gill.) The length of the head equals ^, and the height of 

 the body f of the total length without caudal. The eye is about f as 

 loug as the head. The maxilla extends to, or slightly beyond, the ver- 

 tical through the hind margin of the eye. The pectoral is as long as 

 the head and more than twice as long as the ventral, which does not 

 quite reach to the vent. The scales are large and mostly wanting in 

 the typical examjiles; there are about 25 rows in a longitudinal series. 

 D. ii, 11-12; A. i, 8-9; V. 8; P. 15. 



The specimens are uniformly dark (nearly black) in spirit-s. except on 

 the fins, which are soiiiowliat liglitei' at tiie marjiins. 



