110 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



numerous specimens from Alaska and Puget Sound, and by a 

 colored drawing by Griffin of a specimen obtained at Sitka, Alaska. 



It may be distinguished from the other described species of the 

 coast by its soft and pliable body, capable of very great extension, 

 by its broad, rounded head, and by its bright red, bright orange 

 yellow, or deep vermilion color (PI. 1, fig. 1). In alcohol the color 

 becomes dull gray or brow^nish yellow, with a conspicuous brownish 

 band in esophageal region. 



Their great size — being upwards of 3 meters in length when fully 

 extended — and ])rilliant coloring give the woi'ras a most striking 

 appearance. Such a worm when seen craAvling in long and graceful 

 curves over the bottom in clear water earns for itself a place among 

 the most beautiful of all marine invertebrates. 



The external characters and internal anatomy of this species have 

 already been described and figured elsewhere (Coe, :01), and but 

 few new points have l)een made out from the study of additional 

 series of sections. 



(Jep/talic glands are veiy highly developed (Text-fig. 2), in one 

 specimen extending posteriorly far beyond the mouth. Here the 

 masses of glands mostly lie directly dorsal to the lateral blood ves- 

 sels and communicate with the dorso-lateral surfaces of the body 

 at frequent intervals. 



The rhynchocoel vessels lie in the muscular walls of the proboscis 

 sheath, connect at fi'equent intervals with the lateral blood vessels, 

 and frequently press inwai'd to lie close beneath the epithelium of 

 the i-hynchocoel. The vessels do not project into the lumen of the 

 rhynchocoel, however, as they do in C. sexlineata and some other 

 species of the genus. 



The nephridial canals are provided with a complex tangle of 

 minute tubules — nephridial gland — lying on the external lateral 

 faces of the lateral blood lacunae, in addition to the large longi- 

 tudinal vessels (Text-fig. 14). 



Cerebral sense oryans highly developed, with distinct ciliated 

 canals (Text-fig. 24). 



Sexual products are mature in July and August. 



Habitat. — I have examined one specimen of this species collected 

 at Albert's Head, Vancouver Island, by Mr. C. Shearer. Another 

 fine specimen was sent me from Pacific Grove, Cal., collected at low- 

 water by Mr. A. J. Carlson of Stanford University. Represented 



