DR. BAIED ON THE APHRODITACEA. 33 



indented, a strong tentacle, at tlie base of which are affixed the 

 antennse; eyes 2 or 4 (?), sometimes so indistinct as not to be 

 easily seen. Setse of feet of three kinds — setaceous and serrulate, 

 subulate and serrulate, jointed and bidentate. Elytra covering 

 the back, furnished with simple papiUse. 



Kinberg, in taking the Bigalion Mathild(S of Audouin and 

 Edwards as the type of his restricted genus Sigalion, was, un- 

 wittingly perhaps, led into an error, from that species having 

 been originally described by these authors from an imperfect 

 specimen, in which the tentacle was destroyed. 



In the illustrations to the ' Eegne Animal,' edition Crochard, 

 M. Edwards rectifies this mistake, having, since the first publi- 

 cation of the species, met with other and more perfect speci- 

 mens : in these the tentacle was present. 



It is only right and fair, as Ehlers had already pointed out, to 

 restore the name Sigalion to the typical species as correctly 

 described and figured by M. Edwards in the 'Eegne Animal.' 

 I therefore propose to retain the name Sigalion for the species 

 which Kinberg has placed in his genus StJienelais, and to insti- 

 tute a new genus to receive such as he referred to his restricted 

 genus Sigalion. 



Sp. 1. Si<3^ALiOK Mathilda, Avdouin Sf Edtoards, Hist. Nat. dtz 

 Littoral de la France, ii. p. 105, tab. 2. figs. 1-10 ; Regne 

 Animal, ed. Crochard, tab. 20. figs. 1, la-lc. 

 Hab. Coast of France, Mdwards. 



Sp, 2. Sigalion boa, Johnston, Loudon's Mag. Nat. Hist. vi. 

 p.322, fig. 42 (1833). 

 Sigalion Idunse, Rathke, Act. Nov. Acad. Nat. Cur. xx. pt. 1. p. 150, 

 tab. 9. figs. 1-8 (1843). 



Hob. Coast of Britain, Johnston ; Coast of Norway, RathTce 

 {Mas. Brit.), 



Sp. 3. SiQ-ALioN Helena. 



Sthenelais Helense, Kinberg, I. c. p. 387, and in Fregatten Eugenies 



Resa, p. 27, tab. 8. figs. 36, 36a-36h. 

 Hah. Valparaiso, Kinberg. 



Sp. 4. Sigalion articulatum. 



Sthenelais articulata, Kinberg, I. c. p. 387, and in Fregatten Eugenies 



Resa, p. 28, tab. 8. figs. 38, 38a-38h, tab. 10. fig. 62. 

 Hab. Erio de Janeiro, Kinberg. 



LINN. PROC. — zoology, VOL. IX, 5 



