160 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [454] 



Ascidians. 



Salpa Cabotti, adults and young ; August and September, (445.) 

 Doliolum, sp. ; summer, (A. AGASSIZ,) (446.) 



Appendicularia, sp. ? (like A. furcata j) summer, (A. AG-ASSIZ,) (446.) 

 Appeudicularia, sp., (like A. longicauda ;) summer, (A. AGASSIZ.) 

 Larvae of fixed Ascidians, (445.) 



RADIATA. 



Eclilnoderms. 



Strongylocentrotus Drobachiensis, larvae, (447.) 

 Asterias arenicola, larvae ; evening, (447.) 

 A. vulgaris, larvae ; evening, (447.) 



Acalephs. 



Mnemiopsis Leidyi ; February, July to September ; day-time, (449.) 



Lesueuria hyboptera, adult ; September; day-time. 



Pleurobracbia rbododactyla, adult and young; January to May, 

 July to September; day-time and evening, (448.) 



Idyia roseola, adult ; September ; day-time, (451.) 



Oyanea arctica, adult; August, September; day-time. Young in the 

 "ephyra" stages; April; young of all sizes up to four inches across; 

 May, (449.) 



Aurelia flavidula ; August, September ; day-time, young ; May, (449.) 



Dactylometra quinquecirra, adult and young; July to September; 

 day and evening, (449.) 



Trachyuema digitale, young ; Wood's Hole, July 1 ; day-time. 



Tiaropsis diademata; Wood's Hole; April 17, (V. K Edwards.) 



Oceania languida, medusae; June to September; day-time. 



Eucheilota ventricularis, young medusas ; evening. 



E. duodecimals, medusa; July. 



Obelia, several species, medusas; evening chiefly, (447.) 



Eheginatodes tennis, medusas ; September ; evening. 



Zygodactyla Grcenlandica, medusas; June to September; day and 

 evening, (449.) 



^quorea albida. medusas ; September ; evening. 



Tirna formosa, adult; February, 1872; April 30, 1873, (449.) 



Eutima limpida, medusas; September; evening. 



Lafoe'a calcarata, medusas ; September ; evening. 



Nemopsis Bachei, medusas ; June to September ; evening. 



Bougaiuvillia superciliaris, medusas, April, May, June : evening. 



Margelis Carolineusis, medusas ; August and September, chiefly in the 

 evening, (450.) 



Dysmorphosa fulgurans, medusas ; evening, (448.) 



Modeeria, sp., medusas. 



Turritopsis nutricula, medusas; July to September; evening. 



