14 



COE 



sheath of connective tissue. The central canal leads ventrally and 

 outwards to open through the epithelium of the lateral margin of the 

 head. The sense organs are innervated by several large nerves from 

 the adjacent dorsal ganglion (p1. x, fig. 2). 



Cephalic glands. — Enormously developed, making up a large por- 

 tion of tissues of snout (p1. ix, fig. i). These glands are closely 

 packed throughout the tissues internal to the integument, and form 

 thick layers around the cephalic blood lacunae and the rhynchodaeum. 

 Nearer the brain region they become more scattered, and disappear 

 just in front of the ganglia, those about the rhynchodaeum reaching 

 back a little farther than those situated external to the blood lacunae. 

 The secretion from the glands stains most intensely with ha^matoxylin. 

 Most of the anterior glands pour out their secretion on the tip of the 

 snout ; those farther back open along the whole circumference of the 

 body, but most abundantly near the lateral margins (p1. ix, fig. i). 

 Still farther back all the glands open laterally. 



Nephridia. — Situated mainly in, and a little behind, middle third of 

 esophagal region. There is a single large longitudinal canal on each 

 side, lying in close contact with the dorsal walls of the large, lateral 

 blood lacunjE (p1. ix, fig. 3). The nephridial canals reach forward 

 about as far as the anterior end of the broad band mentioned above as 

 becoming darkly colored in alcohol. Near its posterior end each 

 canal exhibits a peculiar relation with the outer integument. At sev- 

 eral points in each canal the dorsal wall of the canal becomes discon- 

 tinued and the inner ends of the integumental cells reach inward into 

 the lumen of the canal (p1. x, fig. i). Sometimes this infolding of 

 the integumental cells occupies a large part of the lumen of the ne- 

 phridial canal. Superficially these areas always show one or more 

 openings in the outer layers of the integument, but such openings do 

 not penetrate the nephridial canal. At the posterior end of each ne- 

 phridial canal there is one, or sometimes two, efferent ducts (p1. ix, 

 fig. 3) which lead to the dorso-lateral surface of the body, as in other 

 species. 



Habitat. — The species was found at Hot Springs (near Sitka), 

 Virgin Bay in Prince William Sound, and at Dutch Harbor, Unalaska.' 

 Individuals were occasionally seen crawling about on the bottom be- 

 neath the water, and in such instances were extremely conspicuous, 

 because of their large size and brilliant vermilion color. They were 

 more commonly found under stones near low-water mark, but were 

 nowhere abundant. 



' Collected also bj Mr. Shearer at Vancouver Island, B. C. 



