382 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 24 



PAGE 



Elliptocephala asaphoides Emmons (See pis. 25 and 44) 269 



Fig. I. A nearly entire specimen from the type locality (35^), one 

 mile west of North Greenwich, Washington County, New 

 York. The spines on the five posterior thoracic segments have 

 been restored from another specimen. Two-thirds natural 

 size. U. S. National Museum, Catalogue No. 18350a. 



2. Pygidium and seven posterior thoracic segments of the speci- 



men represented by fig. i but without the five dorsal spines. 

 Natural size. U. S. National Museum, Catalogue No. 18350a. 



Figs. I and 2 are copied from Walcott, 189x0, pi. 89, figs. 

 I and la. 



3. A small, nearly entire dorsal shield with the third thoracic 



segment prolonged into long spines. X 4- Collection New 

 York State Museum, Albany. 



4. A dorsal shield 8 mm. in length with 13 segments. Whether 



the last segment (?) is the pygidium or a turned in segment 

 cannot be determined. X 3- Collection New York State 

 Museum, Albany. 



5. Cephalon and 13 segments of young individual in which the 



third thoracic segment is not prolonged beyond the others. 

 X 2. The glabella is broadened and the entire cephalon short- 

 ened by compression and crushing. Collection New York 

 State Museum, Albany. 



Figures 3, 4, and 5 are copied from Walcott, 1891a, pi. '88, 

 figs. lb, ic, and id, respectively. 



6. Cephalon 5 mm. in length that was used as the base for fig. if, 



pi. 88 of Walcott [1891a]. X 2. Restored to the right of the 

 line crossing the drawing. Locality (38) near South Gran- 

 ville, Washington County, New York. U. S. National Museum, 

 Catalogue No. 15413a. 



7. A cephalon 3 mm. in length with glabella much like that of 



fig. 6. X 3- Locality (38a), near North Granville, Washington 

 County, New York. U. S. National Museum, Catalogue No. 



8. Form of hypostoma associated with this species at several locali- 



ties. X 4- This specim.en is from locality (33), in the town- 

 ship of Greenwich, Washington County, New York. U. S. 

 National Museum, Catalogue No. 15413^- 



Figure 8 is drawn from the specimen illustrated by Wal- 

 cott, 1891a, pi. 88, fig. ig. 

 9. A fragment preserving four of the posterior spine bearing tho- 

 racic segments. Natural size. Locality (35^). near North 

 Greenwich, Washington County, New York. U. S. National 

 Museum, Catalogue No. 18350^. 



This figure is copied from Walcott, 1891a, pi. 90, fig. la. 



