NEMERTEANS 



129 



5. Body rather stout, flattened in intestinal region, fragile ; 

 length up to 15 cm. or more ; head long and slender, 

 with long cephalic furrows ; ocelli wanting. Brown- 

 ish, dark drab or purplish brown, with a series of 

 very fine white rings, often much obscured ; tip of 

 head and borders of cephalic furrows white. 



L. ivilsoni, p. 195. 



aa. Caudal cirrus present. Body rather firm, not provided 

 with thin lateral margins in intestinal region ; incapable 



of swimming Micrura. 



I. Of small size, 4 to 8 cm. in length; ocelli wanting. 

 Deep blood red, sometimes with tinge of purple ; 

 head of same color, with narrow, transverse, white 

 crescent near tip of snout which has a small terminal 

 black or dark brown spot surrounded by red continu- 

 ous with that of ventral surface. 



M. nigrirostris, p. 198. 



SYSTEMATIC DISCUSSION OF NEW SPECIES 

 In the following pages those species recently found on the Pacific 

 coast of North America which have proved to be new to science are 

 described in detail from a study of both living specimens and prepared 

 sections. Only those anatomical features are discussed, however, 

 which offer peculiarities not found in most related species or which 

 are of special interest from a morphological standpoint. 



Included with the species new to science are certain forms which 

 have not previously been recorded from the Pacific coast of North 

 America. Of these only the most striking anatomical peculiarities are 

 mentioned. 



Descriptions of only those genera which were not represented in 

 the collections described in Part I of this report are given place here. 

 For the remaining generic descriptions the reader is referred to Part I, 

 previous article. 



i. CARINELLA FRENATA sp. nov. 

 pi. xv, figs. 5, 6; pi. xxii, figs. 2, 3. 



In general shape of body this species resembles those which are 

 most typical of the genus, as C.superba, C. capistrata, C.sexlineata, 

 and which have rather firm, moderately slender bodies. Head much 

 broader than body, rounded or emarginate in front, much flattened 

 dorso-ventrally, sharply marked off from body by deep, lateral, trans- 



