242 Diesing. 



Species inquirenda. 



2. Microstoninm littorale OERSTED. 



Corpus oblongum lineare, capite et extremitate postica aequali- 

 ter obtusis, fuseum. Os apertura longitudinali. Ocelli in margine 

 laterali, ab apice corporis quinta ejus parte remoti. Longit. 2"'. 

 Multiplioatio per partitionem spontaneam transversalem. 



Microstoma littorale Oersted: in Kroyer's Naturhist. Tidsskr. 1844 — 

 1845. 417. 

 Habitaculum. Prope Dröbak haud procui a littore (Oersted). 



Genus situ oris ignoto adhue dubium num Acrostomatibus v. Hypostomatibus 

 adnumerandum: 



XXVIII. APHANOSTOMUM OERSTED. 



Corpus oblongum. Os . . . Ocellus (otolithus?) unicus hyalinus 

 in medio corpore anteriore. Sexus . . . Anus . . . Maricolae. 



1. Aphanostomani griseum OERSTED. 



Corpus oblongum, autice obtusum, posteriora versus sensim an- 

 gustiuSj grisescens vel flavescens. Longit. 1'". 



Aphanostoma griseum Oersted: in Kroyer's Naturhist. Tidsskr. I. 



1844— 184S. 417. 

 Habitaculum. Ad littus prope Dröbak (Oersted). 



2. Aphanostouiuni värescens OERSTED. 



Corpus oblongum utriuque ferme aequaliter obtusum, virescens, 

 maculis duabus brunneis in margine anteriore laterali. Longit. .. . 

 Aphanostoma virescens Oersted 1. c. 417. 

 Habitaculum. Ibidem (Oersted). 



3. Aphanostouiuni diversicolor OERSTED. 



Corpus oblongum, antice obtusum, flavescens, medio latius, 

 cyaneuin, poslice subacuminatum, fuseum. Longit. 1'". 

 Aphanostoma diversicolor Oersted 1. c. 417. 

 Habitaculum. Ibidem (Oersted). 



4. Aphanostouiuni Iatum OERSTED. 



Corpus oblongum utriuque aequaliter dilatatum, rotundatum, 

 medio angustius, grisescens. Longit. V". 

 Aphanostoma Iatum Oersted 1. e. 4t7. 

 Habitaculum. Ibidem (Oersted). 



