COE: NEMERTEANS OF WEST AND NORTHWEST COASTS. 183 



description given me by Professoi- Wilson, agree perfectly with the 

 very numerous individuals of M. verrilli which I have collected in 

 Alaska and California. 



26. Micrura pardalis, sp. no v. 

 PI. 3, fig. 31 ; PI. 24, fig. 189. 



A single specimen of this strikingly colored species was collected 

 by Prof. C B. Wilson at Pacific Grove, California. The natural 

 colors are perfectly retained after short preservation in formalin. 

 Wilson's notes on the living worm are incorporated in the fol- 

 lowing description : Body rather stout for genus, much flattened 

 ventrall}', a cross section resembling that of a })lano-convex lens ; 

 body broad anteriorly, more slender toward posterior end. Head 

 rather broad, not well differentiated from bod}^ (PI. 3, fig. 31). 

 Cephalic furrows of moderate length (PI. 24, fig. 189). 



Length of body of single individual collected about 3 cm. ; width 

 3-5 mm. 



Color. — General color of body clear, pale yellowish or carti- 

 lage color ; ovaries chrome yellow, showing through on ventral sur- 

 face as bright, separate, spherical masses. Dorsal surface thickly 

 covered with black or very dark brown spots and dots of various 

 sizes, often slightly elongated in longitudinal axis of body and very 

 irregularly arranged in longitudinal lines (PI. 3, fig. 31). Head 

 and esophageal regions of a much clearer, paler yellow than that 

 of intestinal region in the ripe female, owing to the chrome yellow 

 color of the ovaries. Brain lobes indicated as pale reddish brown 

 spots, visible mainly from ventral surface. 



Ocelli. — The eyes are difiicult to distingiash in life owing to the 

 many black spots of color on the head. They can easily be dem- 

 onstrated, however, after clearing the preserved specimen in some 

 suitable reagent, when they are conspicuous from the ventral sur- 

 face. A single irregular row usually consisting of 10 to 18 ocelli of 

 rather small size lies on each lateral margin of head (PI. 24, fig. 

 189). Several of the anterior ocelli are usually slightly larger than 

 the others, and are often arranged in an irregular cluster of 3 to 6 

 on each side near tip of snout. The remaining ocelli are scattered 



