Bibliographical Notices. 347 



3. Perigonimus (nov. gen.). " Polypi pallio membranaceo, tu- 

 buloso, gemmis matri similibus imperfectis ramoso, capitulo molliori 

 non retractili, affixi ; tentaculis sub ore verticillatis, biserialibus. 

 Gemmae matri dissioiiles et ovis carentes non in capitulis, sed in caule 

 ramulisque sparsae, campanulatae, cirris marginalibus quatuor." P. 

 muscoides is the only species : it seems related to the Campanularia 

 dumosa of British authors. 



4. Cytais octopunctata ; a new species without a Latin diagnosis, 

 but well-figured. 



5. Pennatula borealis t " 16 ad 31 pollicaris, valde elongata, rubra ; 

 pinnulis breviusculis, semilunaribus, apicem versus longioribus et 

 imbricatis, basin versus minoribus et magis distantibus, cellulis po- 

 lyporum in seriebus 2 — 3 irregularibus dispositis ; rhachide angusto ; 

 stipite (sterili) tertiam ad quintam totius partem aequante, fusiformi, 

 parte bulbosa antice margine elevato et supra papillis sanguineis. 

 Polypi albidi, tentaculis 8 pinnatis apice acuminatis, pinnulis lon- 

 gioribus setaceis." A very fine species. 



6. Lucernaria quadricornis, Mull. = L . fascicularis , Flem. 



7. Lucernaria auricula, Rathke. 



8. Lucernaria cyathiformis, nov. sp. 



9. Arachnactis (nov. gen.). " Animal liberum, molle, natans ; 

 corpus breviter cylindricum, parvum, basi rotundata, disco suctorio 

 carente ; os seriebus tentaculorum non retractilium duabus circum- 

 datum, exterioribus longissimis, interioribus brevibus." One species 

 is known, which M. Sars calls A. albida. It may be compared to a 

 detached head of a Tubularia floating at freedom in the sea. 



10. Agalmopsis (nov. gen.). " Partes cartilagineae superiores seu 

 natatorial ut in Agalmate ; inferiores numerosae, solidae, triangulares, 

 sparsae, non tubum componentes, sed modo una earum extremitate 

 canali reproductorio affixse caeterumque libera?, pro emissione tubu- 

 lorum suctoriorum ac tentaculorum ubicunque fissuras praebentes. 

 Canalis reproductorius longissimus, tubulos suctorios, vesiculas variae 

 formae et tentacula offierens. Tentacula ramulis clavatis (clava variae 

 formae) obsita." The only species is named A. elegans, and well it 

 is entitled to its designation. It is described and figured in the best 

 manner of the author. 



11. Diphyes truncata (nov. sp.), " partibus utrisque cartilagineis 

 corporis pentagonis : anteriori pyramidali, postice truncata absque 

 appendicibus ; posteriori utraque extremitate truncata, postice infra 

 appendice horizontali foliacea margine inciso ; cavitatibus natatoriis 

 aequalibus. Squamis in canali reproductorio cartilagineis fornicatis 

 margine integro." 



12. Diphyes biloba (nov. sp.), " partibus utrisque cartilagineis cor- 

 poris fere ut in praecedenti specie, sed anteriori postice supra cavi- 

 tatem natatoriam appendice horizontali foliacea biloba, lobis rotun- 

 datis ; posteriori quam priori multo minori ; squamis in canali repro- 

 ductorio cartilagineis fornicatis margine quadridentato." 



13. Echinaster sanguinolentus = Asterias sanguinolenta, Mull. = 

 Echinuster Sarsii, MiilL and Trosch. The development of the spe- 

 cies is minutely traced and elaborately described and figured. 



