■14 



MKDUS.-E OF THK WOHI.I). 



8, Bibliothcca Zoologica, 



Cannorbiza conneza Haeckel. 



Cannorhiza eonaexa, HAEiKri, 1880, Syst. dcr Mcdusen, p. 605, taf. 40, fign. 1-8.— VANHiirrtN, 18 

 Heft. 3, p. 39. 



Bell flatly rounded, exuiiibiclla surface finely granulated, 80 mm. wide, 30 mm. high. 

 Gelatinous substance tough and horny in consistency. 8 rhopalia. 80 marginal lappets. 

 In each octant are 8 small, rectangular, velar lappets between 2 small, oval, pointed, rhopalar 

 lappets. The 8 mouth-arms are fused along their sides forming a mouth-arm-c\ iinder. Each 

 mouth-arm is cylindrical, somewhat longer than the bell-radius. The short, free, lower end 

 of each mouth-arm is simple, unbranched, curved outward and somewhat upward. The 

 lateral fusions of the 8 adradial mouth-arms are marked by 8 longitudinal furrows, the 4 

 perradiai being shallower than the 4 interradial. The frilled mouths are developed onh' on 

 the lower sides of the mouth-arms and there are neither filaments, clubs, nor other appendages. 

 The 4 interradial, subgenital ostia are not quite as wide as the perradiai spaces between them, 

 and the arm-disk is not quite as wide as the bell-radius. There is a cruciform unitary sub- 

 genital porticus and the 4 gonads are in the side walls of this space, the cruciform roof being 

 thick and gelatinous. The 4 genital membranes are much folded. The cruciform central 



stomach lies above the subgenital porticus from 

 which it is completely separated by the lateral 

 genital tnembranes and gelatinous, cruciform 

 roof of the porticus. 



A wide canal extends downward from each 

 of the 4 perradiai corners of the stomach, through 

 the columns, into the arm-disk, where they fuse 

 at the center, forming a small cavit\' from which 

 arise the 4 pairs of canals leading down the lower 

 sides of the 8 adradial mouth-arms. Each mouth- 

 arm canal gives ofFnumerous short side branches 

 which lead to the frilled mouths. 24 radial- 

 canals arise from the margin of the cruciform 

 stomach and extend outward into the subum- 

 brella. The 8 perradiai and interradial canals 

 are about twice as wide as the others. The 4 

 perradiai canals are very short and the 4 inter- 

 radial very long. .AH 24 canals give off anas- 

 tomosing side branches and then fuse with the ring-canal. The rinii-canal, in turn, srives 

 rise on its outer side to a fine-meshed network of narrow, anastomosing vessels which ramify 

 through the lappets. Found near New Zealand, South Pacific. Described in detail b\ Haeckel. 



"Stomatonema reticulatum" Fewkes. 



Stomasontma reliculalum, Fewkes, 1884, American Naturalist, vol. 18, p. 300. 



Bell 36 mm. wide, with thick walls, thinner at margin. There arc no marginal tentacles. 

 There are 8 marginal sense-organs which bear some resemblance to those o( AurcUta. Shape 

 and number of marginal lappets f ?) The 8 mouth-arms arise from the arm-disk by 4 attach- 

 ments and are bordered on their lower sides b\' a double row of mouths which also extend 

 half-wa\' up the upper side of each mouth-arm. 4 large, globular, ovarian sacs lie in the 

 interradii of the arm-disk alternating with the 4 primary branches of the mouth-arms. A 

 number of radial-canals arise from the central stomach and fuse with a narrow zone of anas- 

 tomosing vessels at the bell-inargin. Fewkes does not state how man\' radial-canals there are 

 in this medusa, nor does he give any account of the marginal lappets, musculature, relative 

 si7,es of the parts of the medusa, color, gonads, or mouth-arm-appcndages. He mentions a 

 single specimen found in Montevideo Harbor, Atlantic coast of South .America. 



The description given by Fewkes is unfortunately too fragmentary even for generic 

 determination, but apparently the medusa is relared to Haeckel's /fiirosn, but is distin- 

 guished bv having mouths on the dorsal as well as on the ventral sides of the 8 mouth-arms. 



Fig. 425. — ** Cannorhiza connexa^^ after Haeckel, 

 Syst. der Mcdusen. 



