106 TRANSACTIONS OF THE WAGNER FREE 



part of the labrum, serves, apart from all other characters, to readily 

 distinguish it from the more nearly related forms of the group. Mr. Gabb 

 remarks that in Orthaulax the "adult shell [is] enveloped over the whole 

 spire by an extension of the inner lip," but adds that the " outer lip [is] 

 apparently sharp and simple." An examination of the specimens deposited 

 by Gabb in the Academy of Natural Sciences shows that the latter part 

 of his statement is incorrect, the outer lip being to a considerable extent 

 duplicated. The Florida species which I refer to Wagneria, exhibits 

 this character in a very striking degree, the backward extension of 

 the labium, as seen on a cross-section some distance from the actual 

 base, being fully as ponderous in structure as the labrum proper, which 

 it overlaps as a very distinct outer layer. The duplication exists over at 

 least two-thirds of the shell. The unique dome which conceals the spire 

 is a character not seen in Orthaulax, and is one of the most anomalous 

 structures found among the Gasteropoda. 



Wagneria puguax. nov. sp. Fig. 36. 



Shell irregularly oval, obconical, flattened, the flattened appearance 

 being due to three irregular swellings or knobs, one of which immediately 

 adjoins the anteriorly-directed fissure of the aperture ; aperture narrow, 

 projected forward (in its upper course) as a closely compressed fissure, 

 which in a crescentical curve ascends to within a comparatively short 

 distance of the apex of the spire ; outer lip ? (broken in specimen) ; inner 

 lip largely developed, completely concealing the whorls of the spire, and 

 duplicating for a veiy considerable extent the outer lip ; spire freely 

 enclosed in a pointed superstructure, or dome, built over it by an exten- 

 sion of the mantle; surface covered with longitudinal lines of 'growth, 

 which extend continuously from the apex to the base. 



Length (of imperfect specimens, lacking probably upward of an inch), 

 2.7 inches; width, 1.75 inch. 



What the precise relationship of the genus represented by this species 

 may be I am not prepared to say. 



Zittel (Handbuch der Palaeontologie, I, part ii, p. 260) unites Orthau- 

 lax with Hippochrenes, but in doing so this eminent paleontologist ap- 

 pears to have been misled by the rather imperfect diagnosis of the fossil 

 given by Gabb. That its position is near to that genus I believe there 

 can be no doubt. 



Murex larvaeeosta, nov. sp. Fig. 37. 



Shell angulated, obscurely scalariform ; varices seven to eight in 

 number, obtusely rounded, direct ; whorls moderately angulated on the 

 shoulder, crossed by numerous elevated revolving lines, about ten of 

 which on the body-whorl are much more prominent than the remainder, 



