Mr. A. White on a new subgenus of Calandridse. 107 



species it resembles in the shape of the aperture. It is also 

 allied to Nautilus Gravesianus, d'Orb. (Terr. Juras. t. 38), in 

 the laterally compressed volutions ; but that species is furnished 

 with a sharp keel, whereas in N. Saxbii the keel is truncated. 



The Nautilus Saxbii closely resembles the N. mesodicus 

 (Quenstedt) *, but differs from it in being of less breadth, having 

 a smaller umbilicus, and in the greater number of the septa. 



This shell is readily distinguished from the other lower green- 

 sand species by its more compressed form, angular volutions, 

 truncate back and somewhat sagittate aperture, and more sinu- 

 ous septa ; in which latter character it resembles some Jurassic 

 species, as Nautilus biangulatus, N. sinuatus and N. triangularis 

 of the inferior oolite. 



In the individual specimen here described, the last septum is 

 filled with iron pyrites, presenting a contrast to the remaining 

 septa, which are occupied by crystallized carbonate of lime. The 

 body chamber is filled with the sandy matrix of the bed from 

 which it was obtained. 



Locality. From the Lower Greensand, at Atherfield, Isle of 

 Wight ; in the lowest bed of the " Crackers' group " (No. 4 of 

 the " Table " in Geol. Journal, vol. iii.) f. 



This interesting species of Nautilus, which I believe is hitherto 

 undescribed, was put into my hands by Dr. Fitton, F.R.S., to 

 whom it had been sent, with other rare specimens, by S. M. 

 Saxby, Esq. of Mountfield near Bonchurch, Isle of Wight, from 

 his valuable collection of Isle of Wight fossils. 



XI. — Description of an apparently new subgenus of Calandridae 

 from the Philippine Islands. By Adam White, F.L.S., As- 

 sistant Zool. Dep. British Museum. 



Calandra. 



(Hyposarothra, White.) 



Antenna rather strong, springing from a depression situated a 

 little behind the middle of the side portion of the beak, and 

 if stretched out would reach slightly beyond the end of the 

 beak; basal joint nearly as long as the funiculus and last 

 joint taken together; first and second joint of the funiculus 



* "Die Cephalopoden des Salzkammergutes, &c. von" Franz R. von 

 Hauer " (tab. 10. f. 4, 5). Vienna, 1846. 



f In vol. iii. of the Geological Journal the name is N. Saxbianus. The 

 genitive termination is here adopted, on Dr. Fitton's suggestion, as accord- 

 ing with the other new names (Ammonites Hambrovii, &c.) in the " Cata- 

 logue " of part of the Society's Museum (Journal, vol. i.). 



