44 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 28 



Table 4. — Data on eggs and breeding seasons — continued 



Animal 

 Annelids — continued 

 Polychaetes — continued 

 Polycirriis medusa — continued 



Terehellides stroemi 

 Potamilla neglecta 



Spirorbis granulatus 



S. spirillum 



Leeches 



Crangonobdella miirmanica 



Echinoderms : 

 Ophiurans 

 Gorgonocephalus stimpsoni 



Amphiura sundevalli 



Holothurians 

 Myriotrochus rinki 

 Crustaceans : 

 Copepods 

 Copepod from sponge 



Herpyllobius arcticus 

 Cirripedes 

 Balanus crenatus 



Mysids 



Mysis oculata 

 Cumaceans 



Leucon sp. 



Petalosarsia sp. 



Diastylis bidentata 



D. dalli 

 Isopods 



Idotaega entomon 



Date Remarks 



10-11-49 Large, reddish, yolky eggs 



inside body 

 9-26-49 Ripe eggs and sperm 

 9- 6-49 Large, yellow, yolky eggs 



incubating in tube 

 8-17-49 Eggs incubating in oper- 

 culum 

 2-18-50 Eggs incubating in oper- 

 culum 

 9- 9-48 Eggs incubating in tube 

 8-30-49 " " " " 



9-12-49 Developing worms in egg 



capsules 



10-11-49 Developing worms in egg 



capsules 



8- 9-49 Spawned freely. Swimming 



larvae developed 

 August Probably late August or 



early September 



8-10-50 Eggs looked mature 



8- 6-50 50 percent of females ovig- 



erous 

 8- 1-50 50 percent of females ovig- 



erous 

 August With eggs 



8-30-49 Young sets (1-1.5 mm. in 



diameter) 



10- 6-49 Young sets (1-1.5 mm. in 



diameter) 



10-31-49 2 ovigerous females 



10- 6-49 I female with eggs 



10-14-49 I " " " 



8- 8-49 I " " marsupium 



9-16-48 I " " eggs 



8-19-48 3 with marsupiums 



