ECHINODERMATA. 11 



HOLOTHURIOIDEA. ACTINOPODA. 



DENDROCHIROTAE. 



Atiapents imisemita Stimpson, Proc. Boston see. nat. hist., 



1851, vol. 4, p. 8. "Grand Bank, and the coast of Neav 

 England." 



Narragansett Bay, South Shoals of Nantucket, and north- 

 ward; in 10 fathoms or more. 



36 (9). Thyonidium productum (Ayres) Stimpson. 



Stimpson, Invert. Grand Manan, 1853, p. 17. 



Duasi7iodactyla producta Ayres, Proc. Boston soc. nat. hist., 



1852, vol. 4, p, 244. "Eastport, Me." 



Eastport, Maine (Ayres), Casco Bay, Maine (Kingsley). 

 Depth ? 



37 (10). Thyonidium pellucidum (O. F. Miiller) Diiben &, 



Koren. 



Diiben & Koren, Kgl. vet.-akad. Handl. for 1844, 1846, p. 

 303, pi. 4, tigs. 15-17, pi. 11, fig. 57. 



llolothuria pellucida O. F. Miiller, Zool. Dan. Prod., 1806, 

 vol. 4, p. 17, pi. 135, fig. 1. "In arvenosis submarinis locis 



IN NORLANDIA." 



Casco Bay, Maine (Kiugsley, as Thyonidium hyalinum). 

 Depth ? 



38 (11). PsoLus PHANTAPUS ( Strussenfeldt) Forbes. 



Forbes, Hist. Brit. Starfishes, 1841, p. 203, fig. 

 llolothuria jy/iantap us Strussenieldt, Abh. kgl. Schurd. akad., 

 wiss., 1767, vol. 27, p. 268-275, pi. 10. "zwischen Lands- 



KRONA UND HwEN." 



Massachusetts Bay, and northward ; low water mark to far 

 beyond the 50 fathom line. 



39 (12). PsoLUS FABRicii (Diiben & Koren) Liitken. 



Kingsley, Mem. Peabody acad. sci., 1881, vol. 1, p. 1-14, 

 pi. 1, figs. 1-5 ; pi. 2, figs. 6-12. 



