coe: nemerteans of west and northwest coasts. 185 



extremity slender; caudal cirrus not found. Proboscis sheath very 

 small in intestinal region. 



Length 7 to 15 cm. ; width 2 to 3 mm. 



Color. — Pale olive bi-own, grayish ocher, or buff, with deeper 

 olive in intestinal region and paler median dorsal stripe in esophag- 

 eal region. 



Ocelli. — A number of small black ocelli lie in an irregular, 

 elongated cluster, or in a single irregular row, on each lateral 

 margin of head. The number varies from 6 to 12 or more on each 

 side. 



Cephalic glands are remarkably highly developed. They are 

 thickly massed among the other tissues in front of brain, although 

 they cease entirely at anterior border of brain region. 



Cutis glands proper are limited to the outer portions of the 

 outer longitudinal muscular layer throughout the esophageal 

 region proper, while in the stomach region they sink gradually 

 deeper, until they extend completely through the outer longitu- 

 dinal muscles and border the nerve plexus externally. 



In addition to the cutis glands, which have a marked affinity for 

 haematoxylin and always stain very deeply with this reagent, are 

 peculiar accessory glands of large size and with very little staining 

 capacity with haematoxylin, and which are scattered irregularly 

 through the whole thickness of the outer longitudinal muscular 

 layer. These resemble in many particulars the accessory buccal 

 glands found in Micrura alashensis, although their secretion is dis- 

 charged to the surface of the l)ody. They are most abundant in 

 the anterior portion of the esophageal region, and are gradually 

 superceded in the stomach region by the true cutis glands, which 

 sink inward through the outer longitudinal muscles as stated above. 

 They occur throughout the circumference of the body, and are 

 filled with a distinctly granular secretion, which is not very differ- 

 ent fi-om that of some of the larger cutis glands of certain related 

 species. 



Alimentary canal.- — Mouth very small; esophagus sharply 

 demarcated from stomach, which, in the single individual sec- 

 tioned, extends forward for a few sections beneath the posterior 

 end of esophagus proper as a short cardiac caecum. It seems prob- 

 able, however, that this caecum results from the strong contraction 

 of the worm when killed, and that it would not appear when the 



