OLIGOCHAETA. 27 



Vermem himc invenit Laptshinski limo inhabitantem in siuu 

 Ladogae Sartanlaks. 



Pam. EnCHYTRAEINA, d'lTdek. Segmenta multa. Cutis imiseu- 

 losa, fpUnckla. Lobus cephal/cus, lahrnm, superhis formans, segmenfi) 

 huccali co'iitinims; os infer um : fiihus c-ihariit^ j-rcfn,s, adest interdum 

 dilatatio stomaehalis. Apparaf/is rirc/t/ijfiojt/s simiiiirissimus; sanguis 

 incoloratus. Gingulum, conspicuum (urgmm genitalia includens). Oruki, 

 magna; singtda eapsuHs inelusa. Faseieidi setaruni hrevissimarmn 

 davatarum quaterni. — Terrae Immidae incolae, 



Eiu'hytraeus, Henle, uuicum farailiae genus. 



a. lutestiuuiii clilatatione stomachali destitutuin ; cxirpus cylin- 

 dricum. 



E. g'alba, d'lTdekeni /"?) Corpus postice aliquantulum, antrorsam- 

 parttm atteniiatum. cglindrieum; spgg. h-—lxj; r-ufis stibpellucida, Lobus 

 ('cphalicns rotu)idatiis, srgniciito buceali parmn longior, l)ene terminatiis. 

 Orificium oris latum, totuiii frre ^iianjinpin infrriornn spgrnenti bvcpalis 

 occupat. Segmentum anale po^ficr atlnuiahmi., fniin-atinii, pniuttimo 

 longius, nan latins. Corpora jjei'/g/tsfi-ii (= Fonu-clcnicntc dcr KUrper- 

 fliissigkeit, Faizel: Lymphkiigrlcheii, Leydig) — — — '^ Setae reetae, 

 divergentes; externae eufiisquc fasciculi maxim%ae-, intiinae yj ■minitnae; 

 in segment is praccii/uiihiyibus senae, oetonae, octonae, senae ; insegmentis 

 ijero posteingtilariht/s q/if/tcrnae, senae, senae, cjucdernae; in segmentisque 

 xj ultimis tibique quaterncte. Long. IS in. in., latit, : long. = o ; 100. 



Habitat sub foliis maclidis, nee non sub fuels ad littora 

 maris; frequens. — Abo, Helsingfors. 



0/>.s-./ There seems to prevail a very great confusion 

 concerning the family of Enchytraeina, in as much as different 

 authors have directed a peculiar attention to different organs 

 and but very little taken notice of the alterations Avhich depend 

 on the development of those animals or on other circumstances. 

 The » corpora perigastrii> for instance, I think, will vary very 

 much, as for the more or less fine-granulous contents of them, 

 before and after the animal has taken its food. The number 

 of the spines also vary after age. — In Finland Enchytraeina 

 are very common and occur almost every where amongst rot- 

 ting leaves and wracks (Fucus) in the shores, as well as in the 

 fields. — There are also specimens with spines of aequal length 

 and lymphatic globules of almost round, flattened shape with 

 very distinct kernel and nmnerous fine granules (E. vermicu- 

 laris, d'Udekem?). 



% 



Fam. NaidinA, d'Udek. Cutis pertenuis, pellneidus. Lobus eepJia- 

 licus segmento bnccali contimms, saepe in labrum supjerius perquam. 

 longum pr otr actus ; labrum autem stiperitis interdum deest. Os terminale 

 L subterminale inferum. Dilatatio stomaehalis una I. plures. Tubus 



