298 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



6. Central stylet about yi as long as massive, elongated, conical 



basis - macracanthus 



6. Central stylet about half as long as nearly cylindrical basis . tigrinus 



7. Central stylet about twice as long as basis 8 



7. Central stylet nearly equal to basis in length 9 



8. Dorsal surface brown or reddish, with 2 conspicuous spots of 

 darker color on head; 14-16 proboscidial nerves . . bimaculatus 



8. Dorsal surface thickly mottled with dark brown dots and 

 blotches; 12 or 13 proboscidial nerves punctatulus 



9. Dorsal surface mottled with deeply pigmented spots . . . . 10 



9. Dorsal surface without conspicuous spotting 11 



10. Cerebral sense organs anterior to brain nebulosus 



10. Cerebral sense organs beside brain occidentalis 



11. Dorsal surface brown, purple, or red 12 



11. Dorsal surface yellow flavescens 



12. Dorsal surface brown or purple 13 



12. Dorsal surface red or reddish 15 



13. Basis rather slender and conical 14 



13. Basis broad and bell shaped fulvus 



14. With angular white spot on each side of head; ocelli grouped 

 into 2 separate clusters on each side of head; 17-20 proboscidial 

 nerves angulatus 



14. Without white spots on head; ocelli not separated into distinct 

 clusters; 15 proboscidial nerves paulinus 



15. With 4-8 ocelli on each side of head; 10-12 proboscidial nerves 

 californicus 



15. With 10-20 ocelli on each side of head ; 14 proboscidial nerves . 16 



16. Dorsal surface reddish brown pacificus 



16. Dorsal surface flesh color, orange, or red rubellus 



65. Amphiporus angulatus (Fabr.), 1774 



A. angulatus YevnW, 1892; Coe, 1901, 1904, 1905, 1905a. 



Habitat. Lives in sandy situations, particularly beneath stones, be- 

 tween tidemarks and below to depths of 150 m or more. 



Distribution. Greenland, Baffin Bay, Labrador, Nova Scotia, New 

 England to Cape Cod and farther south on the Atlantic coast beneath the 



