Ill 



the nuclear whorls it is set perpendicularly to the plane of the adult, 

 in this ivspect also differing from Oornuoidea or Brown. As his 

 genus must be expunged, being constituted only for young Ckeea, 

 tin' name is retained for the typical Bpecies. 



42. Strebloceras cornuoides (Brown \ n. s. 



St. t. elongate, hand rapide augente .■ vertiee nucleoto magna, 

 anfr. ii. et dimidio, tumentibtw, habitu inereseentu eubregula- 

 riter arcuato, interdnm vix tortuaaoi tuperfieie kern, ten lineis 

 increscentibus concentricis i apertura hand eontraeta, hand tw 



uihla. 



Long. -08, lat. tubse -008— 015. 



Lat. verticis '01— "014. 



lliih. Fossil in Eocene beds, Hempstead and Barton (Edward*). 

 Mus. Brit. 



Twenty-three specimens of this very interesting shell were found 

 by Mr. Edwards, and were alluded to by Searles Wood and by Forbes 



and llanley : their peculiarities, however, do not seem to have lieen 

 recorded till the present time. There is no trace of plug in the few 

 specimens which have lost the nuclear whorls. Onlv one specimen 

 was found from Barton, with one of the next species. 



43. Strebloceras solutum, n. s. 



St. t. ehnguta, tereti ; vertiee nucleoso minimo, anfr. ii. tumi- 

 dioribus ; t. adolescent e rapide augente, Levi ; dein subito 

 lineis concentricis exillinds, creberrimis ornata, subcylindrica . 

 habitu increscentis subregulariter arcuato, sen vix tortuoso ; 



apertura /mud eontraeta, hand tumida. 



Long. -082, lat. tubee -004— '015. 



Lat. verticis '0035— '004. 



Hub. Upper Marine Beds, Hordwell, 6 specimens ; Barton, 1 sp. 

 < Edwards fy Wiggins). Mus. Brit. 



Of this very distinct species, three broken specimens were found 

 by Mr. Edwards in the Upper Marine beds at Hordwell, and one 

 nearly perfect from Barton, along with St. cornuoides. Mr. Biggins 

 was fortunate enough to find three specimens, of which two pos> 

 leased the minute nuclear coils. These are not half the size th.it 

 tluy arc in the last species, though in the adult state it is a trifle 

 the larger of the two. For about one-fourth of the entire ' 

 the shell is smooth and increases rapidly : it then suddenly becomes 

 minutely striated, and adopts the habit of growth of St. comuoidi t. 



Toaasisl the student in the identification of species, an abeti 

 giving the principal distinctive characters at a glance, i- ben ip- 

 pended. 



