THE NAUTILUS. 63 



considerable variation in the longitudinal sculpture, and have been 

 able to arrange good series of a form without any longitudinal ribs, 

 which seems worthy of being a good variety ; we have also arranged 

 a good series of an intermediate form showing numerous ribs which 

 grade into the typical form as described and figured by Prof. Verrill. 

 (Trans. Conn. Acad., Vol. V, p. 461, pi. xliii, fig. 12.) We have 

 good examples of the very young of all three forms, showing the sub- 

 nucular whorls forming the characteristic sculpture. 



Bela blaneyi Bush. Two specimens, one immature and one 

 adult, (see previous article). 



Philine lima (Brown) = P. lineolata Stimp. Two specimens 

 dredged off Egg Rock, one alive. 



Retusa obtusa Montg. var. tarrita Moller. Six specimens. 



Note We have been able tliis season to dredge fine specimens, 



both valves, of Pecten islandicus (Miiller.), Serripes grcenlandicvs 

 {Gmelin), Panomya norvegica (Spengler), Cyrtodaria siliqua 

 (Chem.), and Oochlodesma leanum (Conrad). Of all of which we 

 had previously dredged only single valves. 



A NEW LAND SHELL FROM BERMUDA. 



BY H. A. PILSBKY AND E. G. VANATTA. 



ZONITOIDES BERMCDENSIS H. Sp. Fig. la, b, C, d. 



The shell is broadly umbilicate, much depressed, with low convex 

 spire and rounded periphery, glossy, yellow. First 1^ whorls corn- 

 eous, smooth, the rest distinctly, rather irregularly striate, the base 

 a little smoother. Under the compound microscope very faint traces 

 of minute spiral striai may be seen, chiefly on the upper surface. 

 Whorls 5^, convex, slowly increasing, the last less convex below 

 than in the peripheral region ; the umbilicus perspective, broadly 

 open, one-third the total diameter of the shell. Aperture lunate, 

 wider than high, but not much wider than the umbilicus. 



Alt. 2.3, diam. 5.7 mm.; width of uml)ilicus 1.8, aperture 2 mm. 



Church Cave, near Tuckers' Town, Bermuda. Tyjies no. 91,1 J2, 

 A. N. 8. P., collected by Mr. Stewardson Brown, 1905 and 1909. 



This species has more whorls and a smaller apex than Z. excavata 

 (Bean), it is more depressed, the last whorl is less convex beneath, 

 and the umbilicus is larger. Z. arborea (Say) has invariably a 



