PIIYLOGENY OF FUSUS AND ITS ALLIES. 75 



is covered by the suture. There are two or three finer spirals on the 

 shoulder. Intercalated spirals appear between these on the third 

 whorl. In the next whorl the ribs become mere swollen undulations 

 and the angularity is lost, while the shoulder changes from a flat to a 

 convex contour. The whorls then become round and regular save for 

 the imbricating subsutural band mentioned by Dall. 



In one specimen a nodular character is shown on the center of the 

 last two whorls, due to a strengthening of the two central spirals on 

 the ribs and a complete obsolescense between them. The ribs are 

 from two to three times their width apart. 



Locality and Habitat: Blake sta. 273, 103 fathoms, Barbados (Nat. 

 Mus. 87068) ; Blake sta. 290, 73 fathoms, Barbados (Nat. Mus. 87069). 



The following species from the Blake collections must be referred 

 to other, probably new, genera. Fnsiis benthalis Dall, F. amiantns 

 Dall, F. (cpynotiis Dall ; F. alcinins Dall (and variety) and F. am- 

 phiurgiis Dall. They have for the most part a Falsifitsus t\'pe of 

 protoconch, and may be descended from that genus. 



Species Not Seen. 



The following additional recent species, probably referable to 

 Fusiis, were figured by Tryon (Man. Conch., vol. Ill), who for the 

 most part refers them to species already noticed : 



Plate 32, fig. 96, F. hrenchlcyi Baird (=F. nicobaricus var. Tryon). 



Plate 34, fig. 112, F. loebbechii Kobelt (canal rather short for a 

 true Fusiis). 



Plate 35, fig. 124, F. hartwigi Shuttlew i=F. gradatus Reeve 

 (Tryon) ; fig. 125, F. paeteli Dunker (=F. gradatus Reeve, Tryon) ; 

 fig. 126, F. similis Baird (=F, undatits Gmelin, Tryon) ; fig. 129, F. 

 leptorhynchus Tapparone Canefri ; fig. 155, F. pfcifferi Phil. (Abbild. 

 II,t. 3, fig. I). 



The following additional species arc figured in Sowerby's Thesaurus 

 Mon. Genus Fiistis. 



Plate 4, fig. 25, F. sandvichcnsis Sowerby, apparently allied to F. 

 toreuma; fig. 28, F. siibquadratus Sowerby; fig. 30, F. acuticostatus 

 Sowerby (F. coclatus Reeve, Tryon). 



Plate 5, fig. 35, F. nodicinctus A. Adams; fig. 36, F. dilcctus A. 

 Adams ; fig. 37, F. spiralis A. Adams ; fig. 38, F. pateli Dunker ; fig. 

 43, F. tasuianicnsis Adams; fig. 44, F. similis Baird. 



Plate 7, fig. 62, F. graciliformis Sowerby ; fig. 66, F. articidatns. 



Plate 8, fig. yy, F. pcrcyanus Sowerby; fig. 78, F. assimilis A. 

 Adams. 



Plate 13, fig. 157, F. Iccvigatus Sowerby; fig. 159, F. biangnlatns 

 Deshayes ; fig. 164, F. rudicosiatits Sowerby ; fig. 166, F. Icctus Sowerby ; 

 fig. 168, F. cxca'T'atits Sowcr1)y. 



