156 U.S. NATIONAL MUSEUM BULLETIN 2 82 



serrae. The humeral process is of moderate length; the adipose and 

 caudal fins are rather well connected; the caudal fin is nearly uni- 

 formly colored ; the adipose and dorsal fins have no pigment ; and there 

 are 35 vertebrae. It differs from typical elegans especially in the very 

 short, chunky body. 



The Roaring River specimens appear to be juveniles, ranging from 

 27.0 to 30.5 mm. in standard length. The anal fin is short with 14 (in 3) 

 or 15 (1) rays, all pectoral fins have 9 soft rays, and the vertebrae are 

 34 (3) or 35 (1), all characters that differ modally from typical elegans. 

 In the four specimens the soft dorsal rays are six and there are on each 

 side nine pelvic rays, two internasal pores, and eleven preoperculo- 

 mandibular pores. Each pectoral spine has moderate anterior serrae 

 and five to six recurved posterior serrae. The caudal fins have 24 (1), 

 25 (1), or 27 (2) upper-half rays and 24 (2) or 25 (2) lower-half rays, 

 totaling 48 (1), 49 (1), or 52 (2) rays. 



Noturus trautmani, new species 



SCIOTO MADTOM 



Plates 4 (fig. 7), 13 (fig. 1); Map 11 



Type.— UMMZ 187098 (holotype), collected from Big Darby 

 Creek, 1 mile south of Fox, southeastern Jackson Township, Pick- 

 away County, Ohio, November 4, 1943, by Milton B. Trautman and 

 Walter Cunningham. 



Paratopotypes (all same locality as holotype). — OSU 5914 (1 

 specimen), collected with the holotype. OSU 5988 (1), December 30, 

 1943, M. B. and Mrs. M. A. Trautman. OSU 6621 (1), November 16, 

 1945, Trautman and Owen Weeks. OSU 9570 (1), September 26, 

 1957, Trautman and Donald I. Mount. OSU 9571 (1), October 3, 

 1957, Trautman and Mount. OSU 9572 (2), October 9, 1957, Mount. 

 OSU 9573 (2), October 13, 1957, Mount. OSU 9574 (1), October 22, 

 1957, Trautman and Mount. USNM 202493 (6), November 16 or 17, 

 1957, Trautman and Mount. 



Diagnosis. — Noturus (Rabida) trautmani, with typically 9 pelvic 

 rays, 8 or sometimes 9 soft pectoral rays, 45 to 51 caudal rays, 11 

 preoperculomandibular pores, 2 internasal pores, and reduction of 

 the anterior pectoral spine serrae plus the very short or obscure 

 posterior process of the cleithrum, shows the greatest similarity to 

 Noturus elegans. The somewhat similar Noturus albater has a bolder 

 and different color pattern, more vertebrae, and modally nine soft 

 pectoral rays rather than eight. Other species of the subgenus Rabida 

 differ in one or more of the following characters: number of pelvic 

 rays, number of preoperculomandibular pores, or they are relatively 

 short and heavy bodied with large anterior spine serrae and extreme 

 development of the posterior process of the cleithrum. 



