6o STUDIES IN GEOLOGY, No. 4 



width : they are closely spaced but do not overlap : they do 

 not decrease regularly in width from below upward, although 

 they are prevailingly wide toward the base of specimen and 

 narrower higher up. In the specimen figured the base ap- 

 pears to represent the medium portion of a frond and shows 

 well the variation in width of the pinnae. 



I found this species to be rather abundant at Caleta Paraiso 

 on San Lorenzo* Island and succeeded in collecting more 

 complete material than had hitherto been found. The 

 species was first noted by Neumann who identified it as 

 Otozamites Gccppertiamts (Dunker) 15 a common form in 

 the Neocomian of England and Germany and one which 

 has been referred successively to the genera Pterophyllum, 

 Zamites and Dioonites. Zeiller in his admirable 16 account 

 of the plants collected on San Lorenzo by Capt. Berthon 

 pointed out the distinctness of the Peruvian form which had 

 also been noted by Salfeld in discussing the flora of Hual- 

 lanca. 



The specimen which Salfeld figures from Huallanca and re- 

 names Glossozamites( ?) Hauthali is much less like what Neu- 

 mann identified as Otozamites gceppertianus than is the form 

 which Salfeld described as the new species Otozamites pern- 

 anus. Both are, I believe fragments of the same species, and 

 I have adopted the last as the proper name for this species, 

 after changing the spelling to the proper form. 



This species is very abundant at Caleta de Paraiso and I 

 have several fine specimens of various sizes. It is also 

 found at Huallanca and Huayday. 



Otozamites Zeilleri sp. nov. 

 PLATE II Fig. 3 



Description. Fronds simple pinnate, elongate, the fairly 

 complete material indicating a length of about 30 cm. ex- 



"Seward, A. C., Wealden Flora, pt. 2, p. 70, pi. i, figs, i, 2, 1895. 

 16 Loc. cit. 



