ACTINIARIA 



75 



questions without examining Sars's type-specimen, if it exists, it may be more suitable totally to disregard 

 the genus Lecythia, the more so as any diagnosis of the genus never was given by Sars. There, is, however, 

 no doubt that Lecythia is identical with one or other of the genera Milne-Edwardsia and Paraedwardsia, 

 proposed by myself. Of the latter genus I have had an opportunity of examining the specimens determ- 

 ined as Edwardsia sarsii, further the specimens in the Museum of Berhn (Schaudinn's sp.), those from 

 Korshavn and Appellof's specimens. Appellof {1893) has given a description of the outer as well as the 

 inner organisation of the species; on several points his description is completed here, especially as regards 

 the nematocysts — Appellof does not mention any nematocysts in the capitulum or in the ectoderm of 

 the tentacles — and the occurrence of the "//aZc«w/)fl-papillae" which are also overlooked by Appellof; 

 I made the section-series from the specimens from Bergen, Manger, from Appellof's specimens, and from 

 those from Korshavn. The text-figures, reproduced here, refer to the first-mentioned ones. 



Fam. Linmactiniidae nov. fam. 

 Diagnosis: Athenaria without tentacles or spluncter. Perfect mesenteries 8 — 10 (or more?). 

 Concerning the position of the fanuly and the reduction of the tentacles see my remarks to Limnac- 

 tinia Icavis. 



Genii.s Limnactinia nov. gen. 



Diagnosis: Limnactiniidae with the column not divisible into regions. Column smooth, without 

 cuticle or "//fl/c«w/)fl-papillae." Proximal body-end rounded as a physa, perforated by apertures. Ectoderm 

 af the oral disc very thickened, containing numerous spirocysts. Distal part of the column with spirocysts. 

 No siphonoglyphes. Perfect mesenteries 8 to 10 with reproductive organs. Rather few imperfect mesenteries. 



Of this genus I know two species, Limnactinia laevis, described below, and another one dredged by 

 the Swedish Antarctic-Expedition at South Georgia. 



Limnactinia laevis nov. sp. 



PI. I. Figs. 13, 14. 



nov. sp. Carlgren 1893, p. 23, Note. 



Diagnosis: Proximal body-end with a central aperture surrounded by a cycle of 8 (-10?) apertures. 

 Nematocysts in the proximal part of the column partly 14—18 fi long, partly 24 X 4 «, in the distal part 

 II— 14// in size. Spirocysts of the column 16— 20 // long. The most distal part of the column with a weak 

 longitudinal muscle-layer. Ectoderm of the oral disc extraordinarily high with very numerous spirocysts, 

 ig—^(,[i long, and very sparse nematocysts, 11— 14/.! long. Ectoderm of the actinophar>'nx with nemato- 

 cysts 24—26 X 4 fi in size. 8 "Edwardsia-mesenteries" or 10 (8 + 2 dorsolateral) mesenteries perfect; the 

 two ventrolateral mesenteries of the first cycle always imperfect. 2 (dorsal) to 4 (dorsal and lateral) mesen- 

 teries of the second cycle present. Longitudinal muscle-pennons of the perfect mesenteries in the repro- 

 ductive region with 9 — 15 high folds, branched mainly in their outer parts. Outer lamellar part of the mesen- 

 teries attached close by the outer edge of the pennons. Parietal muscle with a few, thick folds. The expan- 



