64 



THE MEDUSAE. 



additional species have been recorded since. Fewkes ('86)has described, from the 

 Gulf Stream, Sohnaris incisa, which certainly is not a Solmaris but belongs to 

 the present genus ; and Agaissiz and Mayer (: 02) have described, S. marshalli, 

 from the Pacific. The members of the genus are so closely allied anatomi- 

 cally that we are forced to turn to such features as form of the bell, number 

 of tentacles, and number of otocysts, for specific characters. Of these char- 

 acters, probably the first, and certainly the second and third, are subject to 

 much individual variation. To add to the confusion, Haeckel's account of 

 S.faheri and S. bkekii, are altogether insufficient, while S. incisa was described 

 by Fewkes from fragmentary specimens. Fortunately, the present collection 

 contains series of two species, S. marsliaUi and a second probably identical 

 with 8. incisa, extensive enough to allow me to work out the variability of the 

 several characters and their probable specific value more fully than has 

 previously been done. 



Solmissus raarshalli Agassiz and Mayer. 



Solmissus marshalli Agassiz and Mayer, : 02, p. 151, pi. 5, figs. 23-25. 

 Solmaris punctatus Mayer, : 06, p. 1133. 



Plate 16, Figs. 5, 6; Plate 21, Figs. ^, 6-8. 

 Ten specimens of this species were taken at the following stations : — 



The gelatinous disc is thick and rigid ; the marginal lappet zone, on the 

 other hand, very thin. The bell is flat, hardly if at all arched, and about 

 half as high as broad ; its exumbrellar surface is smooth. In life the " collar " 

 region is always so much recurved that, when seen from above, the zone at 



