40 



maxima dorsalia et 2 multo minora labialia ad margines laterales veil lati antice truncati 

 posita. Maxillie corner in proboscide conica exserta valviilas Limre referentes, antice superne 

 auricula triangulari ornata% processu infero uullo. Lingua subcuuelformis radula seriebus trans- 

 versis deutlmn clrciter 20 Isevium dente medio coulee retrotiexo utrinque laterali recto acu- 

 minato. Papillfe dorsales simplices, conicse, breves, utrinque ad latera dorsi et ad marglnem 

 palllalem disperse. Pes ovato-elongatus, latiusculus, augulis anterioribus rotundatls, pallio 

 major. Orificia geueratiouis et ani ad latus dextrum. 



Gonieolis-iyplca. M. Sars. 



Corpus triplo clrciter longius quam latius, altitudine maxima in parte antica sita lati- 

 tudinem a?quante, capite antice valde declivi. Tentacula dorsalia latitudinem corporis sequantia 

 postice cornuum instar curvata minime lamellata; labialia tenuissima fere filiformla lateribus 

 corporis appressa. Papilla? dorsales mininiie, insequales, sparsa. Pes amplus postice conico- 

 rotundatus. Color albido flavescens subpellucidus. Longit. 12 Mm. latit. max 5 Mm. Ha- 

 bitat rarissima ad Christiansund prof. 50—70 orgyarum, nee non in sinu Hardangerfjord prof. 

 100 orgyarum fundo argillaceo. 



The Genus Gonieolis belongs to the family Eolididse Alder & Hancock, but is not 

 properly referable to any of the sub-families formed under this head. It cannot be classed 

 with the Dendronotinse the tentacles of which are lamellated and retractile into sheaths ; nor 

 yet to the Melibseiuse, which have tentacle-sheaths and claviform dorsal papillae; neither can. 

 it be referred to the Hermseina; and Proctonotinae, which have a dorsal anus. The sub-family 

 with which it best agrees is that of the Eolidina?, where however there is not to be found 

 any trace of the mantle, so distinctly marked in the Gonieolis, although not pi'ojecting much 

 beyond the sides of the body, and without spiculae, which are found in the mantle of the 

 family Dorididse. Among the Eolididae it has most resemblance with the proper genus Eolis 

 Cuv. but differs by the presence of a mantle-border, which gives the body a square form, 

 (while the Eolis has a round back), by its unusually large dorsal tentacles, as well as by the 

 labial tentacles springing from the sides of a broad velum, points that are not to be observed 

 in any other species of Eolis with which I am acquainted. It ought therefore certainly to be 

 placed nearest to the Eolis, and the characters for the sub-family Eolidinae should be some- 

 what modified in order to admit it. 



