136 THE MEDUSAE. 



Station 4668 ; 300 fathoms to surface ; 2 specimens. 



Station 4670; in trawl from 3,209 fathoms; 1 large specimen; frag- 

 mentary. 



Station 4672 ; in trawl from 2,845 fathoms; 1 large specimen. 



Station 4672 ; 400 fathoms to surface ; 1 specimen. 



Station 4675; 300 fathoms to surface ; 1 specimen. 



Station 4676 ; 300 fathoms to surface ; 2 specimens. 



Station 4716 ; 600 fathoms to surface ; 1 fragmentary specimen. 



Station 4721 ; 200 fathoms to surface; fragments. 



Station 4722 ; 300 flithoms to surface ; fragments. 



I can add but little to the excellent description and beautiful figures 

 of this species given by VanhofTen. The largest specimen in the series 

 measured 27 mm. in diameter and 20 mm. high ; it had large gonads (PI. 45, 

 fig. 9). In searching for otocysts I was no more successful than Vanhoffen, 

 •who has carefully studied the arrangement in rows of tentacles of various 

 ages. The high-arched bell, the sausage-like form of the gonads, the con- 

 siderable length of the proboscis, and the color are probably characters of 

 specific importance. The last is one of the most characteristic features of 

 this species. The entire subumbrella surface, gonads, and proboscis are 

 densely pigmented with deep reddish brown. Crossota bninnca was taken 

 by the '• Valdivia" in the Atlantic from the equator to 60' S. Lat., and in 

 the Indian Ocean. Under the name C. norvegica it is recorded also from 

 69° 13' N. and 10° 40' E. It undoubtedly belongs to the intermediate 

 fauna. I find no record of its capture in a closing net. 



Halicreasidae Fewkes, 1886. 



Halioreidae Vanhoffen (: 02^). 



Trachomedusae with eight broad radial canals ; with numerous tentacles, 

 of different sizes but all of the same structure and arranged in a single 

 series, each tentacle divisible into a soft flexible proximal and a stiff, 

 spine-like distal region; with free sensory clubs; with neither peduncle 

 nor proboscis. 



The successive studies of Vanhijffen (: 02^) and of Maas (: 05) have given 

 us a good idea of the general organization of these remarkable Medusae ; 

 but on account of the condition of their specimens neither of these authors 

 has been able to study the structure of the tentacles, which proves to be 

 one of the most important characters of the family. 



