COE: NEMERTEANS OF WEST AND NOKTHWEST COASTS. 187 



vation was dredged by the Albatross off San Francisco, California, 

 (Sta. 3478, 36° 44' X. Lat., 120° 57' W. Long.), in 68 fms., gray 

 sand and mud. 



28. Micrura alaskensis Coe. 



Proc. Wash. Acad. Sci., 3, p. 71, PL 4, fig. 2 ; PL 13, fig.l, 1901 ; 

 Harriraan Alaska Expedition, 11, p. 71, 1904. 



This common Alaskan form has now been found to extend south- 

 ward to the coast of California. It may be recognized by the 

 following brief diagnosis ■} Body long and moderately slender, 

 attaining a large size for the genus, rounded in esophageal region, 

 flattened in intestinal region ; caudal cirrus well developed, but often 

 broken ; head remarkably slender, with correspondingly long, but 

 very shallow cephalic furrows. Ocelli wanting. Length commonly 

 15 to 60 cm., although much smallei- individuals are often found. 



Color. — General coloi- of body pale salmon, llesh color or deep 

 pink, but this coloi*ation is much interfered with by color of intesti- 

 nal canal and by the sexual ])roducts when mature. Head pale 

 flesh color or pinkish, sometimes nearly colorless ; brain distinctly 

 red ; intestinal canal with its lateral lobes salmon, yellow or brown- 

 ish; at time of sexual maturity much obscured by the cream colored 

 or yellowish sexual products. A median longitudinal stripe of 

 cream color, flesh color or pinkish, usually extends the length of the 

 body on both dorsal and ventral surfaces, but is conspicuous only 

 in the intestinal region, and is especially prominent at time of sexual 

 maturity. 



buccal (/lands. — There are peculiar glands in the region of the 

 mouth and just behind it which maj^ be called accessory buccal 

 glands, and which have V)een found in no other species. These 

 extend through nearly the whole of the outer longitudinal muscular 

 layer of the body walls ventraPto the lateral nerves. Secretion 

 from these glands is apparently discharged into the buccal cavity 

 and anterior portion of the esophagus. 



Cephalic farrou's are very long, but are remarkably shallow, 

 extending scarcely half the distance from surface of head to 

 brain. 



iPor colored figure and details of anatomical structure, see paper cited. 



