KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. NIO 7. 41 



t lie appearance of the anterior segments and also the number of setigerous and posterior 

 achaetous segments. 



In 1868 Grube (8, p. 55) stated that the species Cl. digitala and Cl. oerstedii now 

 treated were verv much alike. 



St. Joseph (16) mentions only anal cirri of very different sizes, of which the ventral 

 one, at least in certain cases, is obviously the longest. He also places Cl. digitata with 

 a query as a synonym of Cl. oerstedii. 



Attgener (25, p. 238) considers he has found this species, which, cnriously enough, 

 he calls Praxillella (Clymene) oerstedii Clap., at Roscoff. The presence of 7 longer, more 

 or less symmetrically arranged anal cirri makes it really rather probable that this is 

 Claparéde's species. Augener gives 24 or 25 segments, according to whether one as- 

 sumes 3 or 2 posterior achaetous segments; if he has included the buccal segment, 

 there remain, however, 20 setigerous segments, or 1 more than according to one of 

 St. Joseph's statements. Augener points out the occurrence of lateral notches in 

 the cephalic borders contrary to Claparéde's and St. Joseph's descriptions, but 

 attributes, quite correctly, no importance to this. Cf. for this under Clymene 

 claparedei below. 



Finally attention ought to be paid to Clymene claparedei Orlandi (19, p. 27) from 

 the Gulf of Naples, characterized by 19 setigerous segments and 3 achaetous posterior 

 segments, the hindmost of which seems to be, however, the posterior swollen ring, and by 

 7 longer anal cirri with intermediate shorter ones. The lst_8th setigerous segments 

 have parapodia in their anterior half, which is on the whole also true of C. neglectus, 

 if we include only the posterior limit between the 7 th and 8 th setigerous segments, 

 which is situated in front of the glandular band of the 8 th setigerous segment. Or- 

 landi also says that the 9 th segment is very short; this does not agree with C. neglectus 

 if the setigerous segments are ref erred to. But if by this Orlandi means only seg- 

 ments and has included the buccal segment 1 , it would be the 8 th setigerous segment 

 which was very short and there then would be entire agreement with C. neglectus, if we 

 may assume further that only the posterior »limit» between the 7 th and 8 th setigerous 

 segments was observed. 



Orlandi notices certain agreements between his species and Cl. digitata; still he 

 points out that they differ in having different colours, a different number of teeth on 

 the uncini, and in the shape of the cephalic borders. Grube's description of the 

 colour is rather vague, the number of teeth is 5 in one case and 6—8 (not 10) in the 

 other, and finally a lateral notch in the cephalic borders may very well have escaped 

 Grube's notice, as he had only 2 specimens (1 of which was incomplete) at his disposal, 

 especially as these notches not always are conspicuous in species with low bord- 

 ers; thus, for instance, in Caesicirrus neglectus the same notches are only visible in 

 specimens with a very contracted anterior part. Orlandi's reasons for maintaining 

 Clymene claparedei as a valid species are thus not specially strong. 



1 This is not improbable for other reasons because species with a short 9 th setigerous segment do not 

 seem to occur in the Euclymenini. 



K. Sv. Vet. Akad. Handl. Band 63. N:o 7. 



