MUSEUM OF COMPARATIVE ZOOLOGY. 149 



color is pale yellow. In the youngest stages each pigment spot Ls double, 

 formed of two clusters of pigment grains of unequal size. 



Plate II. fig. 2, in Forbes's work, illustrates a young specimen of this species. 

 Figs. 3 b, 3 c, of the same plate, exhibit very well the arrangement of the pig- 

 ment spots of the tentacles in two series. In Plate III. fig. 2, I have given 

 for comparison a younger stage of this genus, with eight long tentacles. The 

 bell is not relatively as high as in Forbes's figure of the same, and the four pro- 

 longations of the bell cavity into the apical projection of the bell are more 

 pointed and deeper than he has represented. 



Development from the egg is unknown. 



Locality, NeAvport, R. I. 



Tunis episcopalis seldom comes to the surface of the water, in the glass vessel 

 in which it is confined, and may be a deep-sea medusa. It seems to be very 

 near the medusa which Claus described as Oceania pileata (Zeit. f. Wiss. Zool., 

 Bd. XIV., Stud, iiber Polypen und Quallen der Adiia. Taf. XIII. figs. 46, 47). 



Modeeria multitentacula, n. s. 



Plate III. Figs. 7, 8, 9. 



A jelly-fish found by Mr. Agassiz, in 1865, resembles closely the genus 

 Modeeria, Forbes, as he has pointed out in manuscript notes from which this 

 description was made. It differs from M. fonrwsa in the following particulars. 

 Its bell is of uniform thickness, while in M. formosa the apex is much thicker 

 than the walls. The chymiferous tubes of M. multitentacula are broad and 

 well defined, whUe in M. formosa they are fine and thread-like. The pedun- 

 cle upon which the stomach and ovaries are borne is much more developed 

 than in M. formosa. The tentacles are more numerous in M. multitentacula 

 than in AI. formosa, and the pigment spots of the tentacular bulbs are found on 

 their under surfaces at a short distance from the union of tentacles and bell 

 margin. The medusa resembles the genus Callitiara, Haeck. M. formosa has 

 undeveloped ovaries, and may be the young of a form more like M. multiten- 

 tacula. 



The bell of M. multitentacula is high, almost a prolate spheroid in form, 

 with one pole truncated to form the bell opening. The diameter near the bell 

 margin is slightly greater than that just above this point. It decreases very 

 gradually towards the apex, where it is only a trifle less than at the bell margin. 

 The bell walls are thin throughout, and without apical prolongation or thick- 

 ening. Chymiferous tubes simple, with smooth profile, and of medium width. 

 They enlarge slightly before their junction with their tentacles, and are four in 

 number. In the upper part of their course they arch over on to the pedun- 

 cle, and extend down the sides of the proboscis to their opening into the stom- 

 ach. Bell transparent, and with smooth surface. 



The proboscis is large, with a peduncle, which fills a large part of the upper 

 portion of the bell cavity, and extends downward almost to the bell opening. 



