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The Ottawa Naturalist 1 1 



suture, to the plate bordering on the posterior margin of the right stereoni 

 protuberance. The stellate grooving of the deeply concaved plates is clearlj 

 denned. The specimen is still partly imbedded in the rock. Kimmswick 

 limestone. Cape Girardeau, Missouri. ID, diagrammatic representation of 

 arrangement of lamellae on interior surface of one of the thecal plates. 



Fig 2. Comarocystites shumardi, Meek and Worthen. Specimen No 

 10472, in the Worthen collection at the University of Illinois. Type, used for 

 figures la, and lb. on plate I and diagram on page 292, Geol. Surv. Illinois, 

 Vol. 3. 1868. Anterior side with the anical part flattened bv pressure and 

 depressed toward the left. The thecal plates surrounding the left pair of 

 arms, as far down and including the anal pyramid, are missing. (Comarocy- 

 stites shumardi obconicus forms No. 10473 in the Worthen collection). Cape 

 Girardeau, Missouri. 



Fig. 3. Comarocystites shumardi, Meek and Worthen. One of two 

 specimens numbered 1574 in the Illinois State Museum of Natural History. 

 Ueft anterior side of the theca, weathered away so as to expose the vertical 

 inisostereom lamellae at the sutures separating the thecal plates. The stereom 

 protuberance supporting the left pair of arms is located in the upper left hand 

 corner of the figure, and the base of the theca lies beyond the opposite corner. 

 The plate supporting this protuberance shows traces of the lamellae and of 

 the inter-lamellar spaces connect ed with the respiratory system, corresponding 

 to the more striking evidence of this system in the other plates. Three thecal 

 plates are represented in the figure toward the right of the protuberance, tooth 

 along the upper and lower margins of the figure. Each plate exposes two sets 

 of lamellae, directed perpendicularly to two different suture - lines. In each 

 set. the lamellae extending from the middle of the suture lines are longer, 

 and those hearer the angles of the thecal plate are shorter. The grooves 

 separating the sets of lamellae belonging to the same plate from each other 

 narrow toward tin angles. The deep triangular pits at the angles of junction 

 of the thecal plates produce a similar appearance. The sides of five additional 

 plates are exposed in parts extending beyond the lower right hand corner of 

 the figure, but these did not show up well in the photograph utilized in the 

 preparation of this figure. 



Fig. 4. Caryocrinites ornatus. -Say. Arms with pinnules attached. 

 Opposite the number 4, and near the base of the figure, are two pinnules 

 which are entire. 



Fig. 5. Caryocrinites ornatus. Say. A. arm with pinnules attached, only 

 the basal parts of the latter well seen near the middle of the figure. Several 

 of the larger brachials bear a strongly nodose protuberance. B, an adjacent 

 arm of the same specimen, showing the granulate surface, and the pronounced 

 alternation of longer and shorter brachials. Figures 4 and 5 are enlargements 

 of specimens in the collection of Frank Springer in the U.S. National Museum, 

 at Washington, and were prepared by Mr. Herrick E. Wilson. 



PLATE V. 



Comarocystites punctatus, Hillings. Specimen retaining the entire 

 length of the column, including the basal attachment disk (described on page 

 89 of present volume). Figure reduced to about eight-tenths of the natural 

 Mze. i inly the left arm in the figure is attached to the theca. The right arm 

 may have belonged to another individual. Presented to the Victoria Memorial 

 Museum by oir James Grant, who published the first description and figure 

 in 1880. (Trans. Ottawa Field-Nat. Club, 1, pi. 1, fig. 1.) 



KILDEER PLOVER. 



Ten years ago the Kildeer Plover (Oxyechus voci ferns) was a 

 rare summer resident in the Province of Quebec. During the past five 

 seasons the bird has become very numerous and is now a common 

 breeder, nearly one hundred nests having been found in the past four 

 or five years. Several observers agree that the Kildeer is spreading 

 rapidly throughout the Province, as in the case of the Meadowlark, 

 which was also very rare a few vears back. 



