Ill EDWARD T. BROWNE. 



Iii 1892 Dr. Antipa described three new species from the Arctic Ocean, and on 

 account of their having gonads in tubular follicles he adopted Haeckel's name 

 Lucernosa for the genus. The species with gonads of a simple structure are left in 

 the old genus Lucernaria, and those with a compound structure placed in the genus 

 Lucernosa. The new species from the Antarctic belongs to the latter group, owing 

 to the structure of its gonads. 



I am not in favour of the splitting up of the species into two genera solely on 

 account of the structure of the gonads, especially as the structure of the gonads of 

 L. bathyphila forms a connecting link between Lucernaria campanula and Lucernaria 

 vanhoeffeni and also Antipa's species. The Arctic species of Lucernaria and Lucernaria, 

 bathyphila found in deep water, 540 fms., between Faroe Islands and Shetland 

 Islands, are all of great size, and in this respect the new Antarctic species can take 

 its place along with them. 



Prof. Vanlib'ffen (1908) has described a new species of Lucernaria under the 

 name of L. australis, which was found at the ' Gauss ' winter station off the 

 Antarctic continent at the depth of 385 metres (about 210 fms.). Unfortunately, only 

 a single specimen was obtained, and this turned out to be an early stage without 

 gonads. It is not likely to be an early stage of L. vanhoeffeni, because it has minute 

 rudimentary tentacles, called " conuli " by Vauhoffeu, one about midway between 

 every pair of arms, and in addition there is no indication of a definite peduncle. 



LUCERNARIA VANHOEFFENI. 

 (Plates V., figs. 3-6, and VII., figs. 3 and 4.) 



Description of the Species. Umbrella campanulate, about as high as broad. 

 Peduncle very short, expanding into a very large, broad, flat, adhesive disc ; one 

 chambered, with four interradial tseniolse terminating in bulbous enlargements without 

 muscles. Eight arms, about equal distances apart, with the four perradial bays about 

 as wide and deep as the iuterradial. Each arm with about 300 tentacles, the exterior 

 row of which has lateral adhesive pads. Stomach short, and containing branched 

 filaments. Mouth with large leaf-like lips. Eight longitudinal bands of genitalia, 

 extending from the stomach to the base of the arms ; each genitalium composed of 

 numerous elongated sacs which have tubular follicles containing gonads. 



Si:e. About GO mm. in height (including peduncle) and 60 mm. in width. 



It is a pleasure to me to associate this new species with the name of Prof. 

 Ernst Vanhoffen. 



Owing to the contraction of the arms the umbrella has lost to a slight extent its 

 natural shape. The sub-umbrellar cavity is large and spacious. The walls of the 

 umbrella are rather thin and have the appearance of being very pliable. The 

 c.\-umbrella is covered with a thick layer of ectoderm which is opaque and white 

 in formalin. 



The peduncle (Plate V., fig. 3) is remarkable for its shape. It is flattened out 



