40 i:i)WAi;i» I', mtowxiv 



lu 1892 Dr. Autipa (le8Ci"iljc<l tlircp new siJCcics from tlie Arctic Ocean, and on 

 acx'ouut of their having gonails in tul>ular follicles he adopted Ilaeckel's name 

 Lucerwisa for the genus. The species with gonails of a simple structure are left in 

 the old genus Liwernaria, and tho.se with a compound structure placed in the genus 

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

 to the structure of its gonads. 



I am not in favcjur 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. Iiatliyph'da forms a connecting link between Lucernaria aiinpaiwla and Lucernaria 

 vanhoefi'i'ni and also Autipa's species. The Arctic species of Lucrrnarin and l.ucermvia 

 bathypkila 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 lan take 

 its place along with them. 



•Prof. Yanhotfen (1908) has described a new species of Lucernaria under the 

 name of L, nustralis, which was found at the 'Gau.ss' winter station off the 

 Antarctic continent at the depth of ;}85 metres (about 210 fms.). Unfortunately, only 

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

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

 rudimentary tentacles, called " conuli " l)y Vanhoffen, one al)0ut midway between 

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



Lucernaria vanhoeffeni. 

 (I'lates 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 di.sc ; one 

 chambered, with four interradial tiBuiolje terminating in bulbous enlargements without 

 muscles. Eight arms, aljout eijual distances apart, with tlie four pcrradial ])ays about 

 as wide and deep as the interradial. Each arm with al)out 300 tentacles, the exterior 

 row of which has lateral adhesive pad.s. Stomacli short, and containing branched 

 filaments. Mouth with large leaf-like lip.s. Eight longituilinal bands of genitalia, 

 extending from the stomach to the base of tjie arms ; each genitalium compo.sed of 

 numerous elongated sacs which have tubular follicles containing gonads. 



'Sice. — About GO mm. in height (including peduncle) and GO mm. in width. 



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

 Ernst Vanhofl'en. 



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

 natural shape. The sub-um1)rellar cavity is large and spacious. The walls of the 

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

 ex-umbrella is covered with a tliick layer of ectoderm which is opaque aud white 

 in formalin. 



The pcdiiiicle (I'latc \'., fig. 3) is remarkable for its sliape. It is llattcned out 



