50 



KR. BONNEVIE. 



[REP. OF THE "MICHAEL SARS" NORTH 



Table IV. 





Median tooth of the radula 



Jaw 



Hook-sacs 



Gills 





Species 



posterior 



lateral 

 (right side) 



Special 

 characters 



Dexiobranchaea 









None 



Triangular 





cilia ia Ggbr. 



\KJ*~? 









lobe 





(From Boas) 



u 





Shallow 

 with 

 short 









Pneumoderm op sis 

 macrochira Meis. 





Unpigmented 



spot of the 



skin 







) f 





hooks 



4 

 radial 



















^neumodermopsis 









crests 



Triangular 





michaelsarsi 











lobe with 





n. sp. 



^ 



A 

 conical 







1 crest 



Acetabu- 



liferous 



appendages 



Pneumoderma 



u. sp.? 





? 





(young radula) 

 Pneumodermon- 



As above. 



cylindrical 



papilla 



carrying 



small 



spines 



Tube-shaped 

 with 





Lobe 



with 



3 crests 



of 

 different 

 numbers 



larvae 



- (From Boas) 





short 

 hooks 



Membranous 

 ring 

 and 





(2—3) and 

 shape 









Pneumoderma 



None, as other (fullgrown) 







4 







atlantica 

 n. sp. 



sp. of Pneumoderma. 







crests 



Small 



lobe 



without 



crests 





Spongiobranchaea 



^5-AjU 





Oviform 



Ring 





australis d'Orb. 



\ ( 





short and 









(From Boas) 



o 





long hooks 









Schizobrachium 



Shallow. 



1 



None 





polycotylum Meis. 



XJ 





Large, solid 



ventral 







(From Meisenh.). 







muscle-mass. 



crest 







Clionopsis 



p*Aa^ 



Group of 





Ring and 







Krohnii Tr. 



w 



small 





4 







(From Boas) 



v — ' 



spines 



Shallow; 

 short 



crests 



None 



Proboscis 









Clionopsis micro- 



cr^AAA^, 



? 



hooks 



None 





long 



cephalus Tesch. 



v_i> 













(From Tesch.) 















