DIAPHANA. 215 



Ocniis SCAPHANDER, :NroNTF. 1810. 



Animal not investing the shell. Eyes, none. Foot ample, but 

 short, the side-lobes small. 



Shell ovate-pyriform, convolute ; spire distinct, depressed, some- 

 what concealed ; aperture very wide, narrowed behind, entire and 

 dilated in front ; inner lip sjiirally convoluted as far as the com- 

 mencement of the spire ; outer lip simple, acute. 



Scaphander puncto-striatus. 



Shell white, solid, elegantly striated with inequidistant, numerous rows of 

 piuictures; spire hidden, aperture large. 



Bnlla punrto-striata, Mighels and Adams, Bost. Journ. Nat. Hist. iv. 4.3, pi. 4, fig. 10 



(1842) ; Proc. of same, i. 49 (1841). 

 Sraphatidt'i- puiicto-stridta, Stimpson, Check Lists, 4 (1860). 



Shell Avhite, rather solid, ovate, with crowded inequidistant, dis- 

 tinctly punctate striae ; spire concealed, aperture very large, 

 contracted at the upper third l)y the intrusion of the body rig. 505. 

 whorl ; labrum rising above the apex, very sharp and regu- 

 larly arcuate ; labium with a very thin lamina extending 

 to the apex. Length, thirty-eight hundredths of an inch ; 

 breadth, twenty-four hundredths of an inch, 



Casco Bay ; taken from the stomach of a haddock, in the 

 summer of 1841. 



This remarkable and trulv beautiful shell resembles an enlarged 

 specimen of B. liiieolata, Couth., to which it is allied ; but it is 

 easily distinguished by its larger size, by the elevation of the labrum 

 above the apex, and, above all, by the punctate striae. Only a single 

 specimen has been found. It is in the cabinet of J. W. Mighels 

 {Mig-hels and Adams^. 



Fishing Banks {Willis'). 



Oenus DIAPHANA, Brown. 1833. 



Head disk broad and short ; tentacular lobes short, conical, lat- 

 eral, wide apart ; eyes immersed in their hind bases. Mantle 

 margin slightly thickened. Foot short, bi-lobed behind. 



Shell thin, hyaline, sub-umbilicated, inflated, ovate or sub-globose ; 

 spire depressed, with a mammillatcd nucleus ; aperture expanded, 

 not extending beyond the body whorl ; columella reflexed and siim- 

 ose ; outer lip sinuose, produced anteriorly. 



