Smith and Harger — St. George's Banks Bredglngs. 45 



obliquely. Diameter of the larger tubes, at end, 1-75""" to 2"""; 

 height of the more elevated spirals, 3'""' to 5""". 



There are 15 large branchiae in the adult specimens : 8 on the left 

 side, 7 on the right, with the operculum ; the pinnae are long, slender, 

 extending to near the ends of the branchiae, which have slender and 

 short, naked tips. Operculum large, Avhite, calcareous, irregularly 

 obconic, obliquely truncated, with the outer surface concave, the 

 dorsal side gibbous, the margin slightly sinuous but entire, except 

 for a small notch, or emargination, in the dorsal edge ; the dorsal por- 

 tion is translucent, while the ventral portion is opaque and contains 

 small, round, ova-like bodies ; the pednncle is rather sliort and stout 

 gradually expanding into the base of the operculum, but swollen in 

 the middle, on the dorsal side. Collar, in the specimens examined, 

 considerably mutilated, apparently with a sinuous but not revolute 

 anterior margin, and with a long posterior dorsal point. The region 

 covered by the collar bears, at least on the left side, three large fjxs- 

 cicles of slender, acute, yellowish seta^, both above and below ; the 

 anterior fascicles are directed forward, and the upper anterior one is 

 larger than the other fascicles. 



Le Have Bank, 45 and GO fathoms (localities h and ^). 



The size of this species is exceptionally large, and the branchiae are 

 unusually numerous for the genus Spirorbis, to which I refer it with 

 some hesitation. When living specimens can be studied it may prove 

 to be a new genus. It has, like Vermilia, a calcareous operculum, 

 but in form and structure this organ resembles that of some species 

 of Spiro7'bis. — A. E. V. 



? Spirorbis nautiloides Lamarck. 



Anim. sans Vert., ed. I, vol. v, p. 359, 1818. ? Spirorbis communis Quatrefages, 

 Histoire naturelle des Anneles, vol. ii, p. 489. 



Plate IV, figure 4. 



The species figured agrees pretty well with that described by 

 Quatrefages, but may not be the same as that of Lamai-ck, which is 

 regarded by several writers as synonymous with it, and by others 

 with S. horealis, the species so abundant on Facus at low-water mark, 

 on our shores. 



The present species is seldom, if ever, found at low-water mark, and 

 occurs chiefly on stones and shells in deep water. The tubes are 

 opaque, white, cylindrical, rather closely coiled, the terminal portion 

 not erect, and the surface is more or less conspicuously marked with 

 lines of growth. 



Abundant on the hard bottoms at Saint George's Bank; Casco 



