36 



UULLETIN Ob' THE Bl'KKAU OF FISHERIES. 



and having a rugose manubrium. Tentacles similar in size and character to preceding; radial and 

 circular canals wide, all with undulating outlines; velum well developed. The sexual dimorphism 

 noted in the preceding seems to be lacking in this species. 



Ontogeny. — Brooks has described this medusa (cf. op. cit.), as derived from a hydroid which he 

 identified as Perigonimus minutus Allman. 



Colors. — Bell transparent; tentacles and bulbs reddish as is also the manubrium. 



Distribution. — Similar to the preceding. 



TURRIS Lesson I 1837). 



Turris vesicaria A. Agassiz. Text cut. 



Turris vesica na A Agassi/, I'roeoediiiKs Boston Society of Nut lira 1 History, Vol. IX. 1862, p. 97; North American Acalephae, 



1865, p. I'd. 

 Catdblema vesicarium Haeckel, System der Medusen, 1879, p. 64. 



Medusa high, bell-shaped or hemispherical, with a prominent globular apical projection; tentacles 



numerous, each with broad basal enlargement bearing a single ocellus, and tapering to filamentous 



Turris vesicaria. i After A. Agassiz. 



Turris episcopalis. ' Alter Fewkes 





ends; manubrium large and with prominent crenulated oral lobes: gonads borne on base of manu- 

 brium and extending somewhat upon tin- four radial canals. Edges of the latter and of the marginal 

 canal irregular or jagged. 



Colors. — Bell transparent, manubrium and gonads dull yellowish. 



Distribution. — Nahant. 



I have never taken this medusa, and the above description is condensed from that of A. Agassi/., 

 who reports having taken it hut once, ami suppose- it to he somewhat rare. 



Turris episcopalis (Forbes). Text cut. 



Oceania episcopalis Forbes, British Naked eyed Medusse, lsis, |>. -jt. 



Turris episcopalis Fewkes, Bulletin Museum Comparative Zoology, Vol. VIII, 1881, \>. 1 it. 



Medusa shaped somewhat like an inverted teacup and with a rather sharp apical projection. 

 Radial canals 4, wide and with jagged edges: marginal tentacles Hi. long aid highly contractile, 



