88 MESOZOIC FLORAS OF UNITED STATES. 



base to some distance above it and are attached b)^ the entire base. The 

 midnerve of the pinnules is distinct and maintained to near their ends. 

 The lateral nerves are not shown, but apparently in their place occur two 

 closely approximate parallel, paired bands, that, to the unaided eye, look 

 like very thick nerves. The lens shows that these bands are concrete 

 rows of minute punctiform bodies that seem to be the capsules. These 

 paired bands or rows leave the midnerve at a large angle, and, in the 

 case of two adjacent bands, go from a common point. They go nearly 

 parallel to one another, so as to meet the margin nearly at a right angle. 

 The paired bands seem to follow lateral nerves, one member of the pair 

 being on each side of a nerve. 



This form is much smaller than the two Triassic fossils, Dana'opsis 

 marantacea Heer, and D. RumpRi Schimp. As stated before, the general 

 aspect of this plant is strikingly like that of Cladophlehis denticulata. 



PI. XV, Fig. 6, shows the most complete specimen. Fig. 7 shows 

 an enlarged pinnule, and Fig. 8 a portion of this still further enlarged. 

 Fig. 9 gives another enlarged pinnule to indicate the distribution of the 

 capsules. 



I name this plant for Mr. Storrs as a slight recognition of his valuable 

 work in collecting these plants. 



Order EQUISETALES. 



Family EQUISETACE.E. 



Genus EQUISETUM Linnaus. 



Equisetum ? sp. Fontaine. 



PI. XV, Fig. 10. 



The collections show no remains of algaj and no unequivocal Equi- 

 setum. There are a few fragments of small stems that may be some form 

 of Equisetum, but they are decorticated and of doubtful position. These 

 fragments are about 5 mm. in width and sometimes 5-7 cm. long. They 

 show ribs or cord-like cylindrical raised lines, running longitudinally, that 

 do not seem to be any form of nerve. No articulations are indicated and 

 no sheaths or teeth were seen. At most these forms are merety suggestive 

 of Equisetum. They are among the rarest of fossils. Such a form occurs 

 at localities Nos. 2, 7, and 19. 



