60 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



Depth of the body in its length G times. Caudal peduncle in length 

 of the body 4 times. Its depth in its length twice. 



Dorsal fin-rays X, 12; the spinous and soft portions well separated. 

 The spinous dorsal beginning at a point one-third of the distance from 

 the snout to the caudal fin. Its length four-fifths and its height one- 

 half the length of the head. Soft dorsal with the same dimensions as 

 the spinous dorsal. The distance between the last spinous ray and ihe, 

 first soft ray equal to two-thirds the length of either portion of the dor- 

 sal. Anal fin II, 10. Its length equal to two-thirds the length of the 

 head, and its height one-half the head. This fin begins immediately 

 opposite the first soft dorsal ray. The hard rays are slender and about 

 one-half as long as the longest soft rays. 



The posterior portion of the body is densely scaled. There appear 

 also to have been some scales on the anterior portion of the body above 

 the lateral line, but in the single specimen known they are now missing. 

 There are apparently no scales on the interior half of the body below 

 the lateral line. There would probably be about sixty transverse rows 

 of scales. The lateral line is deficient on five or six of the last scales 

 of the caudal peduncle. 



The color of this little fish is pale straw, or in life, perhaps, pellucid. 

 It is marked with some blotches and specks of olive, about 10 square 

 spots along the back, and about as many along the lateral line. The 

 spots are most distinct on the hinder portion of the body. Along the 

 sides the last 4 or 5 are considerably the largest. There are a few 

 specks of olive between the lateral and dorsal rows of spots. The top 

 of the head is dusky, and there is a small but very distinct black spot 

 at the base of the caudal. There are no distinct markings below or in 

 front of the eye. 



From the Pearl Eiver at Jackson, Miss. 



4. Percina caprodes (Raf.) Grd. — Hogfisli. 



Specimens of this species were captured at Vicksburg and at Jack- 

 son, Miss. 



5. Alvordius aspro Cope & Jor. — Black-sided Darter. 



One specimen was secured while seining in the Yalabusha Eiver at 

 Grenada. It thus appears to have a very wide geographical distribution 



6. Hadropterus spillmani Hay. — Spillrnan's Darter. 



I have another specimen of this fish from the Chickasawha Eiver, at 

 Enterprise, Miss., but I obtained none in other parts of the State. It 

 is not unlikely that this will prove to be a variety of II. migrofasdatus. 

 However, there appear to be some differences between the two that, 

 so far as we yet know, are constant. 



7. Boleosoma olmstedi (Stor.) Ag. — Johnny Darter. 



A very few specimens of this Darter were obtained in the Eig Elack 

 Eiver, near Edwards, and again in the Yalabusha at Grenada. As it 



