as al so in the genus Lernaeonerna,according as the 

 anterior portion or head has only two horns or 3 

 so ar rang ed that the unpaired -dorsal horn stands 

 oetween the paired lateral ones: l)Kead armed with 

 two horns or free-laranched processes. .P.sagitta 

 (Linn.) P.filosa (Linn.)« 2)Three occipital 

 horns. .P.Mainvillii (Les.) and P. sultana (Nord.). 



But we have not oeen aole to use this ftasis 

 of grouping since we have found in at least one 

 species that this relation is so varied that we 

 judge it is not of much value as a species charac- 

 ter. We have chosen to present the remarks we 

 have to malce upon the species already Known in the 

 old way and to.add our new species to such of them 

 as they are most closely related to. 



PENNELLA SAGITTÅ,(Linn. ). 

 This longest Known species of Pennella,which 

 se ems to "be one that in its fully developed and 

 sexually ripe stage attains only a very small size, 

 Linnaeus published in 1754- as "attached to Lophius 

 tumidus" in his Chinensia Lagerstroemiana( Amoen. 

 Acad. ,vol.^,p.257;pl.3,f ig.l3),and Djr Lophius tu- 

 midus he almost certainly means the f ish cailed "by 

 that name in Osoeck's Voyage,p.305 from the Atlanti« 



