coe: nemerteans of west and northwest coasts. 109 



the esophageal region. Proboscis opening siibterminal ; mouth a 

 small round opening on ventral sxirface just back of lateral trans- 

 verse fuiTows. The lateral nerves lie outside the muscular layers of 

 the body and just beneath the basement layer of the integument. 

 The body walls are made up of a very thick outer epithelium vnth 

 abundant glands, a basement layer, a circular muscular layer, and a 

 longitudinal muscular layer in the order named, fi-om without inwards. 

 In addition to these there is, in the esophageal region, an inner circu- 

 lar muscular layer which often forms a dorsal, and sometimes a ven- 

 tral crossing with the fibers of the outer circular muscular layer. 



Proboscis sheath usually not more than one third the length of 

 body. Proboscis small and short. Ocelli wanting. Cerebral sense 

 organs usually represented simply by a pair of sensory pits in the 

 epithelium, although some species (cf . C. rubra) possess a pair of well 

 developed- sense organs with ciliated canal, ganglion cells and glands. 

 A pair of peculiar lateral sense organs is usually situated well back 

 in the esophageal region. Some of the species show elaborate mark- 

 ings of tine white lines on a brownish body, others are homogeneous 

 in color. Most species are colored in some shade of brown or red ; 

 some are bright vermilion and others milk-white. 



Of this genus seven species are now known to occur in the region 

 included in this report, only one of which ( C. pellncida) has been 

 found in other portions of the world. Three of these forms are 

 known only from California, while the other four occur both in 

 California and Alaska. 



1 . Carinella rubra Griffin. 

 Ann. New York Acad. Scl, 11, p. 203, 1898. 



Carinella speciosa Coe. Proc. Washington Acad. Sci., 3, p. 11, PL 

 3, fig. 6; PI. 9, figs. 1-3; PI. lO^figs. 1, 2, 1901. Harriman 

 Alaska Expedition, 11, p. 11,^1904. 



Carinella rubra Coe. Harriman Alaska Exj^edition, 11, p. 115, 

 1904. 



PI. 1, fig. 1 ; Text-figs. 2, 14, 24. 



This species, which is the largest and most brilhantly colored of 

 any which have been described in the genus, is represented by 



