1 02 K. J. Bush — Marine Gastropods referred to 



H. serpuloides Montagu is given by Fischer as an example of the 

 section Daronia under his CyclostrematidBe. I place it with the 

 Vitrinellidoe. 



The species described and figured by G. O, Sars (p. 345, pi. 34, 

 figs. 6«-6c?), as Cyclostrema areolatara^ seems to me a true Delphi- 

 noidea, 



Adeorbis S. Y. "Wood, 1842. Type, A. subcarinaius (Montagu). South coast of 

 Devon. 



Plate XXII. figs. 5, 9. 



Mr. Searles V. Wood, in 1842, in his "Catalogue of the Crag 

 Mollusca," published in the Annals and Magazine of Natural His- 

 tory, London, ix, proposed the genus Adeorbis for a group of small 

 shells which he characterized as follows : 



" Whorls subdiscoidal, volutions few, peritreme sharp, inner lip 

 sinuous, umbilicus large and deep." 



He failed to mention a type species as such, but described and 

 figured A. striatus Wood, alone of the five species which he referred 

 to the genus, only naming the other four, all of which are new, 

 except A. subcarinatus (Montagu), which is placed as fourth in the 

 list. In 1848, in his "Monograph on the Crag Mollusca," he redefined 

 the genus as follows : 



" Shell generally small, suborbicular, depressed, with a few nearly 

 discoidal and rapidly increasing volutions, umbilicus large and deep; 

 peritreme entire and nearly continuous, slightly interrupted by the 

 previous volution, deeply sinuated on the inner side, having a minute 

 or incipient sinus at the upper part of the aperture near the junction 

 of body-whorl." 



Although comparing the genus with Skenea he placed it next to 

 Margarita. He again failed to mention a type species, but placed 

 A. striatus Wood first, as before, and described and figured four 

 other species, omitting A. subimbricatiis, which in 1842 he included 

 in the genus with a mark of doubt, and added A. pidchralis Wood, 

 which in 1842 he had identified as Margarita helicina Wood, He 

 also mentioned that his A. striatus is probably the same as Valvata 

 striata of Philippi. 



Mr. S. P. Woodward in his " Manual of Conchology," published 

 in 185 1-C, defined Adeorbis and mentioned and figured as the type, 

 A. subcarinatus (Montagu), placing it next to Cyclostrema^ as a sub- 

 genus of Delphinula. 



H. and A. Adams, in 1858, in their "Genera of Recent Mollusca," 



