ARGOBUCCINUM. 45 



a tooth, like Monoceros ; columella plicate in the young, much 

 thickened and smooth in the adult shell. Length, 2'5 to 4 inches. 



Cape of Good Hope; Ins. Chiloe and Conception, Chili ; 



Chatham Isles, New Zealand ; Isle of St. Paul, Indian Ocean. 



The type-form of this species (fig, 61) is from Cape of Good 

 Hope, whilst the R. Ranelliformis, King (= vexillum, Sowb, 

 fig. 62), supposed to be distinguished by being lighter in structure, 

 more fusiform, columella wrinkled, no tooth on outer lip, etc., is 

 from W. Coast of S. America ; found in rocky places at from 3 

 to 10 fathoms by Mr. Cuming, There is every gradation between 

 the two forms, however, even in Cape specimens, and I cannot 

 separate them even as varieties. 



Mr. Velain* remarks that R. proditor (fig. 64 = this species) 

 is very plentiful at the Islands of Amsterdam and St. Paul, in the 

 Indian Ocean, where the skeletons of seals, abandoned on the 

 rocks at low-water by the fishermen, were literally covered with 

 lobsters and Ranellse at the succeeding tide. They are nocturnal 

 in nabit and may be readily fished by suspending over-night, in 

 10 or 15 metres depth, the body of a bird or fish. 



Undetermined Ranellse. 



The following species being imfigured, cannot be placed 

 definitely : 



R. PRODUCTA, Pease ; R. UITKOSTOMA, Pease; both from the 

 Sandwich Islands. 



R. JUCUNDA, A. Adam's ; North Auxtrc/lia. 



R. EPITREMA, Tenison- Woods. This is described as a widely 

 ovate, whitish species, not quite an inch in length ; it is nodose 

 and lirate. with a conspicuously margined lip. dentate within. 

 It has a deeply canaliculate suture, causing the varices to over- 

 lap in a singular hooked manner. Australia. 



The description agrees very well with that of R. jucunda, A. 

 Adams, 



R. PAULJJCCIANA, Tapparone-Canefri ; Mauritius. Possibly 

 one of the numerous varieties of R. cruentata, Sowb. 



Archiv. Zool. Exp. VI, 100. 



