PLATE 4 2. 



Page. 

 Fig. 1. Goniobasis invexcsta ;.,,t 



l,a. A dorsal view of the type-specimet), with tin- apex of the spire broken away. [Lines of 

 growth too strong and regular.] 



1. b. An aperture view of another individual, with lip a little broken. 

 l,c. A smaller individual, dorsal view. 



l,d. Same view of a still smaller specimen. 

 l,e. An aperture view of the last. 

 In,. 2. Goniobasis c iNVEXA 562 



2, a. An aperture view of the type-specimen, which has the lip broken so as not to show the 



form of the base of the aperture quite correctly. 

 •J, li. Another view of the same specimen, which, as in 2, a, has the lines of growth not repre- 

 sented curved enough. 

 2,e. A figure of the variety impressa, showing its more convex volutions and deeper suture. 

 2, (J. Another view of the same, the lip being broken so as to give an unnaturally angular 

 appearance to the base of the aperture. 



Fig. 3. Gojiiobasis ? gracilenta 568 



An aperture view of the type-specimen, a little magnified. [Aperture too much produced 

 below. See wood-cut in text.] 



Fig. 1. Goniobasis? omitta 568 



4. a. Dorsal side of the type-specimen, magnified nearly two diameters, 



4, h. An aperture view of the same. 

 4,c. Surface-markings, magnified. 



Fig. 5. Goniobasis subl^evis 567 



.">, a. An aperture view of the type-specimen, which has its lip broken so as to give an unnat- 

 ural angularity to the base of the aperture. 



5, 6. Another specimen, a little enlarged, showing more accurately the form of the aperture. 



Fig. 6. H yalina occident.u.is 547 



6, a. An aperture view of one of the largest type-specimens. 

 6, b. Under or umbilical view of the same. 



6, c. Upper side of the same. 



6. <J. Upper side of a small specimen. 



Fig. 7. Helix? vetusta 552 



7,«. Au aperture view of an internal cast of type-specimen. [Other specimens show the lip 

 to be dilated and the aperture constricted.] 



7, b. Au opposite view of same. 



Fig. 3. Hi n\ .' vetbrna 596 



S, a. An aperture view of an internal east. 



8,6. An opposite view of the type-specimen, also an internal east. [Not drawn in a proper 

 posture to show the slightly-reflexed character of the lip. See cuts in text. ] 

 Fig. '.'. Macrocyclis sfatiosa 594 



0, a. An upper view of the type-specimen, consisting of an internal cast, natural size. 



9,6. An under-side view of the same, showing the umbilicus. 



0, c Au aperture view of the same. 

 Fig. 10. VlTRINA OBLIQUA 545 



10. u. Au upper-side view of the type-specimen, consisting of an internal cast, not" complete 



at the aperture. 

 10, b. Au aperture view of the same. • 



