THE BLIND-FISHES. 121 



the larvse. Many of them were found with tufts of the hyphae 

 growing out of their mouths and gill openings. 



A colony has been apparently successfully planted in an 

 open pool at Winona Lake, Indiana. 



III. The Color of the A^nblyopsidce. 



The three species of Chologaster are colored with varying 

 intensity from C. cornutus, in Florida, which is darkest, to C. 

 agassizii, in Mammoth Cave, in which the color is faintest. 

 The color cells are in all cases arranged in a definite pattern. 

 These are determined by the underlying muscles. The pattern 

 consists of three longitudinal bands on the sides following the 

 line where the muscle segments are angularly bent, and cross 

 stripes along the Hne separating successive segments. 



The lower side of the head and the abdomen of Chologaster 

 papilliferus are sparingly pigmented and translucent. The 

 underlying liver and gills give the parts a rosy tinge. On the 

 sides and top of the head, pigment is abundant. There is a 

 more densely pigmented area extending along the middle of the 

 back, beginning as a narrow stripe at the nape, and widening 

 to the dorsal fin behind, where it occupies the entire back. On 

 the sides are three narrow stripes, which, owing to the accu- 

 mulation of pigment in two layers, are quite dark. Each stripe 

 has a lig-hter central band, widest at the middle of the sides. 

 The light band, without the conspicuous bordering dark stripes, 

 runs along the middle of the belly. The sides are thickly 

 covered with a layer of pigment, leaving usually colorless lines 

 where connective tissue separates successive myotomes. On 

 the sides of the tail the pigment is dense on either side of these 

 colorless lines. A dark band extends along the sides of the 

 head through the eye. The top of the head is dark. 



The pattern of Chologaster cornutus agrees with that of 

 papilliferus. The longitudinal bands are much darker and 

 wider and without the light central streak. The middle band 

 is much wider than the others, and is continued forward to the 

 tip of the snout. The amount of color present varies very 

 greatly with the locality from which the specimens come. 



