HUNDES— INTER-TRAPPEAn. 57 



and younger formation than the members of his " Diamond Sand- 

 stone and Limestone " system. 



HypOgene series.— Name used by T. J. Newbold (Joum. Soy. As. 

 Soc. YIII, 145, 1844) for the fundamental crystalline complex 

 of Southern India, " penetrated and broken up by prodigious out- 

 bursts of plutonic and trappean rocks." Gneiss and hornblende 

 schist are by far the most prevalent rocks, according to New- 

 bold, but he describes also mica-schist, talcose schist, chlorite 

 schist, actinolite schist, marble and clay-slate. 



Itldianite. — Proposed by Count de Bournon (Cat. Coll. Min. du Roi, 

 Paris, 1817, 60) for the granular mineral forming the matrix of 

 corundum in South India, described by him in 1802 (Phil. Trans., 

 1802, 233 — 326). The name anorthite was given to the same 

 mineral by Gustav Rose in 1823, and by common usage replaced 

 indianite in literature. 



Indus or ShingO beds.— Name used by F. Stoliczka (Mem. Geol. 

 Surv. Inch, V, 338, f.n., and described 354, 1866) for some slates 

 exposed in the Indus valley from the mouth of the Zanskar river 

 up towards Hanle from which Dr. Thomson in 1848 brought down 

 nurnniulites. These are presumably the same as those previously 

 [ibid., 129) called the sandstones and slates of the Upper Indus 

 valley and considered to be very much older. 



Inira=Krol. — The carbonaceous slate series underlying the Krol lime- 

 stone in the Simla area. Named by H. B. Medlicott (Mem. 

 Geol. Surv. hid., Ill, part 2, 17, 29, 1864) who proposed to include 

 the Krol quartzite and its probable equivalent near Simla known 

 as the Boileauganj quartzite. 



Inira=trappean— See Dudkur infra=trappean beds, Lameta. 



Inter=trappean beds. — Term in general use for the freshwater sedi- 

 mentary deposits intercalated between the various flows of the 

 Deccan trap, but, as a rule, more common among the lower flows. 

 The fossils of the lower inter trap peans are generally those indi- 

 cating freshwater conditions, i.e., Physa prinsepii, Limncea, Palu- 

 dina, Melania, TJnio, with entomostracous Crustacea and numerous 

 plant remains. At Bajahmahendri, in an outlier of the Deccan 

 trap, the intertrappean beds have a distinctly estaurine fauna. 

 Fossils belonging to the genera Cerithium and Potamides are found 

 associated with Physa, Limncea, Corbicida. The upper intertrap- 

 peans, known as the Frog beds, have only been investigated in 



