u 



Individei-nes læiigde indtil 3 cm., hvoraf lirancliialsæk- 

 Iceii optager omtr. 4""" og abdomeii omtr. 4""". 



Ingestionsaabniiigen med 6 smaa tynde tænder. 



Egestionsaabningeii med en kort tragt, paa hvis me- 

 diale side tangen er fæstet. 



Branchialsækken, in- og egestionsaabningen er skuf- 

 fende lig fiTossopliorum mlniJosums. 



BrMnciiialrækkernes antal gaar ned til 13. Antal 

 stigmata inden hver række omtr. 24 paa hver side. 



Dorsallamina af stigmas halve — hele iængde. 



Yentrikelen er pæreforraig, verticaltstillet med den 

 spidse ende vendende nedad. 



Postabdomen meget lang; den ovre halve del ialmin- 

 delighed transparent og undertiden sammenklemt til sin 

 halve bredde eller mindre, den nedre del opak. 



Larverne ligger ligesom hos gJosso-phorum xolmJosiim 

 ordnede paa Ijranchialsækkens sider baade ovenfor og ne- 

 denfor anns. 



Denne art forekommer sjelden og i en dybde af 20 

 — 40 favne ved Lofoten og Havosund (Sårs). Ligeledes 

 har jeg haft anledning til at nndersøge exemplarer fra Bo- 

 hiislan indsamlede af E^loderus. 



Aplidiopsis sarsii, n. sp. 



(Tab. I, fig. 11 — i:;). 



Cornuis globuløs, bruskagtig, opak (hos alkoholpræ- 

 parater) med eller lulen en kort fod. Høiden 3..". cm., dia- 

 meteren 2..'' cm. Hos et andet exemplar var hoiden 3 cm., 

 diameteren 5 cm. 



Individerne omtr. 2 cm. lange, bredden omtr. l.ri""". 

 De ligger tæt ved hinanden med de lange postalidominer 

 bugtede uregelmæssig om hinanden. 



Systemer umerkelige. 



Ingestionsaabningen med 6 korte tænder. 



Egestionsaabningen med en vid tragt, der paa den 

 media.le side forhenger sig til en bred tunge. 



Nervegangliet danner udvendig en liden forhøining.  



Branchialsa'kken af smaa dimensioner; længden lig 

 abdomens. Stigmata lod sig ikke tælle paa gruiid af bran- 

 chialsækkens contraiierede tilstand. Antal rækker var 

 omtr. 14. 



Yentrikelen globuløs med fuldstændig glatte vægge. 



Anus ved branchialsækkens midte.. 



Postabdomen meget lang indtil l..")cm.. bugtet i for- 

 skjellige retninger, cylinderformet, opak (hos alkoholprrepa- 

 rater). 



Æggene var usædvanlig store og naaede næsten ven- 

 trikelens størrelse. De var alle af samme størrelse og laa 

 i en sækformig udvidelse af postabdomen.s øverste del. 



The length of tiie memliers is up to 3 cm. of which  

 the branchial sac and the al)domen each occupy about 4""". 



The branchial oriiice has 6 small, thin denticles. 



The atrial oritice has a short tunnel, on the medial 

 side of which the languet is attached. 



The branchial sac nnd the branchial and atrial ori- 

 fices are strikingly like those parts in Glossophoritm sahu- 

 losftm. 



The nuniber of ]'ows of liranchial stigmata may be 

 as low as 13; the number of stigmata in eacli row aljout 

 24 on each side. 



The dorsal laminæ measure in length from tlie iialf 

 to the whole lengtli of a stigma. 



The ventricle is pyriform, placed vertically witli tlie 

 pointed end downwards. 



The post-al)domen is very long; the upper half is 

 usually transparent, and sometimes compressed to lialf its 

 width or less: the lower half is opaque. 



The larvæ are arranged, as in Glossophorum sahulo- 

 siini, on the 'sides of the brancliial sac both above and 

 below the anus. 



This species is of rare occurrence. It was found, at 

 depths of from 20 to 40 fathoms, at Lofoten and Havosund 

 (Sårs). I iiave also bad an opportunity of examining speci- 

 mens from Bohusliln. coUected by Floderus. 



Aplidiopsis sarsii, n. sp. 



(Fl. I, fios. 11 — 13). 



The cormus is globular, cartilaginous and opaque (in 

 spirit specimens). either witli or without a sliort peduncle 

 Height 3.."i cm., diameter 2.'\ cm. In one specimen the 

 height was 3 cm., diameter o cm. 



The members are about 2 cm. long and ]..'i""" broad. 

 They lie close to one another with their long post-abdo- 

 mens curved irregularly aliout one another. 



The systems are not noticeable. 



The branchial aperture has 6 short denticles. 



The atrial aperture has a wide funnel, which elongates 

 itself cm the median side into a broad tongue. 



The nerve-ganglion forms a little proniinence externally. 



The liranchial sac is of small dimensions, the length 

 beiug tbat of tlie abdomen. The stigmata did not allow 

 of lieing counted, on account of the contracted state of the 

 branchial sac. The number of rows was about 14. 



The ventricle is globular, with perfectly smooth walls. 



The anus is in the middle of the branchial sac. 



The post-abdomen is very long, up to l.ficm.. curved 

 in several directions, cylindrical and opaque (in spirit 

 specimens). 



The ova are unusually large, almost attaining to tiie 

 size of the ventricle. Tliey are all of the same size, and 

 lie in a sac-like expansion of the upper part of the post- 

 abdomen. 



