AI'PKNDIX. 



723 



Nemopsis dofleini Maas. 



Ncmopsh dofeini, Maas, 1909, Abhandl. Akad. Wisscn., Miinchcn, Suppl. BJ. 1, Abhandl. 8, p. 11, taf. 1, fign. 4 und 5. 

 Favonia nifiponica, Kishinoi'Yk, 1910, Journal College of Sci., Tokyo, vol. 27, art. 9, p. 26, plate 5, fig. 25. 

 {f) Favonia sulcata, Kishinouve, Ibid., p. 26, plate 5, fig. 26 (contracted specimen from Korsakoff). 



It is probable that Nemopsis dojleini Maas is identical with Favonia nipponica Kishinouye 

 and that the pair of small median tentacles of each perradial cluster was lost in the g preserved 

 specimens studied by Maas. These are very brittle and are often lost in larjje specimens of 

 the American Ncmopsts, especiall}' after preservation in formalin. Kishinou\e finds that the 

 marginal tentacles arise in two rows from the "epaulets," whereas Maas finds them in a single, 

 closely crowded row. The appearance of two rows is often due to contraction or to crowd- 

 ing. Bearing these differences in mind, I present the descriptions of both authors in order 

 that they ma\' be compared in detail. 



Willsia pacifica Maas. 



IVillia pacifica, M«s, 1909, Abhandl. .Akad. Wisscn., Munchen, Suppl. Bd. I, .abhandl. S, p. 17, taf. 3, fig. 16. 



Bell flat. 2 to 3 mm. high, 5 to 7 mm. wide; 6 regularly spaced radial-canals arise from 

 the stomach and branch so that about 6Xi8 terminal canals reach the bell-margin. Manu- 

 brium flat, 6-sided, with 6 complexly-folded Hps. 96 to 108 tentacles as numerous as ihc 

 terminal branches of the radial-canals. 96 to 108 short, narrow nettling streaks upon the 

 exumbiella, alternating with the tentacles. No ocelli. Ring-canal rudimentary. Color ( ?) 

 Coast of Japan in September. One specimen. 



Polyorchis karafutoensis Kishinouye. 



Polyorchii karafutoensis, Kishinouye, 1910, Journal College of Sci., University Tokyo, vol. 27, art. 9, p. ;o, plate 5, fig. 31. 



This medusa differs from Polyorchis petiicillata in its greater size, being 60 mm. high and 

 50 mm. wide. Also iis gonads are dichotomously branched, many of the marginal tentacles 

 are forked, and the ring-canal gives off centripetal branches. 



There are about 40 gonads, 10 on each radial-canal, and these are longer than the manu- 

 brium, which latter is of the size and shape seen in P. pcnicillata. There are about 120 marginal 



