NO. 9 



MARINE INVERTEBRATES, ALASKA — MacGINITIE 



109 



Table 7. — Gross analysis of plankton. Point Barrow, Alaska, August-September 

 1948, September 1949-July 1950 — continued 



10-31-49 None 



II- 1-49 Larval forms, few 



1 1- 10-49 None 



I -21-50 I sm. 



1-25-50 I larva; i Autolytns fallax with egg sac 



1-27-50 4 sm. forms 



2-10-50 None 



2-25-50 



2-28-50 2 sm. 



3- 8-50 I sm. 

 3-14-50 None 

 3-23-50 



3-29-50 Autolytus fallax with egg sacs, AA; Syllis fasciata (with eggs 

 inside), 3; 10 5". corniita with swimming setae 



4- 8-50 4 larval forms; 2 trochophores ; sev. adult worms, with eggs, going 



to pieces 

 4-15-50 10 larval forms; 5 metamorphosing from trochophore stage; Auto- 

 lylus fallax with egg sacs, A ; 2 Syllis cornuta with swimming setae 



5- 2-50 Larval forms, C; trochophores, C 



5- 9-50 14 trochophores (sev. kinds) ; 6 yg. worms 

 5.17.50 8 larval forms ; trochophores, C ; i ovig. syllid 

 5-23-50 Larvae, C (with 4 eye spots) 



5-30-50 Larvae, A (with 4 eye spots) in various stages 



6- 6-50 Larvae, C (feeding on green diatoms) 

 6- 9-50 Larvae, C 



6-16-50 Larvae, C (perhaps spionid) 



6-20-50 Larvae, C ; i polynoid larva 



6-23-50 Larvae, C 



6-27-50 Larvae, C (at least 2 kinds) 



6-30-50 Larvae, few 



7.13-50 Larvae, 3 or 4 kinds; sev. kinds of trochophores; 4 larval polynoids 



ARTHROPODS — CRUSTACEANS 



