122 Remarks on Certain Species 



H. monodon Rack., lip reflected, var. with denticle on outer lip. 

 " barbigera Redf. " 



H. Edvardsi Bland, small notcb, lower lip more or less appressed. 

 " spinosa Lea, " " " . 



. H. Edgariana Lea, " " " 



" stenotrema Fer., " " " 



H. hirsuta Say, deep notcli, " " 



" labrosa Bland, " lower lip produced. 



H. maxillata Gould, no notcb, lower lip produced and duplicated 

 witbin the aperture. 



D. Lip reflected — with fulcrum. 



16. Parietal process modification o/'§ 11, and two lip teeth. 

 H. leporina Gould — lip teeth modified form of notcb. 



" pustuloides Bland. 

 " pustula Fer. 



H. Mooreana W G. By. 



" tholus.* " 



H. vultuosa Gould, continuation of parietal lamella to lip inci- 

 pient only. 



i 



H. Dorfeuilliana Lea. 

 " Troostiana " 

 " fastigans L. W. Say. 

 " Ilazardi Bland. 



17. One parietal and two lip teeth. 



H. introferens Bland, — allied to H.fallax and H. vultuosa. 



18. Parietal process modification o/" § 11, with lamella on lower lip 



and two extending doivnwards, forming, far within the aperture, 

 a modified duplication of the lower lip, with notch having 

 refiexed hook. 

 H. bippocrepis Pfr. 



* H. tholus is, I believe, a large var. of ff. Jifooreana. 



