THE CAMBRIAN FAUNA OF INDIA 253 



faunas might be represented.' Later (1899) Dr. K. Redlich 

 described the collections made by Messrs. Middlemiss and 

 Noetling, and concluded that the Cambrian fauna of the Salt 

 range cannot be referred to a later horizon than the Paradoxides 

 zone^. My review of the type material received from Dr. Hol- 

 land and a small collection made for me by Dr. Fritz Noetling 

 lead me to agree with Dr. Redlich and also to add that there 

 is no evidence that the fauna is much older than the Paradoxides 

 or Middle Cambrian fauna. 



The supposed heads of Olcnellus mentioned by Dr. Waagen 

 are very properly referred by Dr. Redlich to a new genus 

 named by him Hocfcria which name being preoccupied was 

 replaced by Redlichia b}^ Cossman.^ This genus differs from 

 Olcnelhis " by the presence of a well-developed facial suture 

 and by the distinct separation of the eyes from the glabella." ^ 

 Another difference is the absence of the characteristic surface 

 sculpture of OloicIInsJ' My present impression is that Redlichia 

 is a direct descendant of Olenelhis and that it lived in late 

 Lower Cambrian or Middle Cambrian time. 



Dr. Redlich calls attention to the resemblance between Red- 

 lichia^ and Protolemts Matthew, but he does not note the re- 

 semblance to Zacanthoides Walcott.*' Both Protolenus and 

 Zacanthoidcs are Middle Cambrian genera. The former occurs 

 just below the Paradoxides fauna on Handford Brook, New 

 Brunswick, and the Olenellus fauna is found 460 to 480 feet 



' Loc. ct'L, p. 106. 



'Mem. Geol. Sur. India, N. Ser., Vol. i, 1899, p. 11. 



* Revue Cretique Paleozoologie, Sixieme Ann., 1902, p. 52. 



* Loc. cit., p. 2. 



5 Dr. Redlich states that Walcott mentions the presence of facial suture in 

 Oletiellus and quotes from page 175 of Bulletin 30, U. S. Geol. Survey, 1886. 

 In 1S91 I wrote of the supposed suture in Olenellus: "The discovery of more 

 perfect specimens of O. (M.) asafhoides shows that what I had identified as the 

 facial suture is a raised line in the coat of the interior of the shell that fills a de- 

 pressed line occupying the position of the suture. I have since found this line 

 in many specimens but in none is there a true suture cutting through the shell, 

 as in Paradoxides and most other genera of trilobites." (Tenth Ann. Rep. U. S. 

 Geol. Sur., 1891, pp. 633, 634). 



^ As shown on plate XXV, figures 2, 3, 4 and 6, Bulletin 30, U. S. Geol. 

 Surv., 1S86. 



