COE : NEMERTEANS OF WEST AND NORTHWEST COASTS. 239 



Fig. 46.— AmpMpoms angulatus. 

 Dorsal side of anterior portion 

 of body, showing markings on 

 head and arrangement of ocelli. 



measurements. Often sexually mature when 15-25 mm. in length, 

 and 2-8 mm. in width. 



Color. — Dark brown, reddish In-own, 

 or purplish brown on dorsal surface, Anth 

 paler margins and conspicuous, angular 

 whitish spot on each side of head (PI. 1, 

 fio;. b\. continuous with color of ventral 

 surface. A narrow V-shaped whitish 

 marking extends across body just back 

 of head, and a narrow transverse line is 

 situated on each side near tip of snout 

 (Text-fig. 46). Ventral surface whitish 

 with tinge of gray or purple (PI. 1, fig. 



6). 



Ocelli. — A pair of elongated clusters 

 containing upwards of 20 small ocelli 

 are situated on the antero-lateral bor- 

 ders of the head, and a smaller, poste- 

 rior group of 8 to 1 5 ocelU lies in or near 



the angular white spot on each 

 lateral margin of head (Text-fig. 

 46). 



Proboscis. — Large and thick ; 

 pale reddish or salmon in color ; 

 armed with moderately slender 

 central stylet and 2 (rarely 4) 

 pouches of accessory stylets, each 

 containing 8 to 7 rather slender 

 stylets. Basis about the same 

 length as stylets (Text-fig. 47). 

 Usually there are 18 proboscidial 

 nerves, although 19 or 20 are 

 " sometimes found, and I have seen 

 a single specimen from Maine 

 which had but 17. 



Cerebral sense organs well 

 developed, situated immediately 

 in front of brain. 



Cephalic and suhmuscular 

 Fig. il.— AmpJiijiorus angulatus. Out- n i i 



line of stylet apparatus. glands remarkably well devel- 



