128 NEW YORK STATE MUSEUM 



are broad, each being nearly two-fifths the width of the shield, and each 

 bearing 15-16 rather narrow ribs separated by deep grooves, each rib 

 divided by a sharply incised furrow. Each branch of the rib bears a row of 

 irregular tubercles which are generally larger on the lower moiety and are 

 retrally directed. These do not attain great size nor spread over the grooves 

 and furrows as in some species. On the axis 16-17 ^^^ annulations are 

 present and these are also tubercled in a single row. Beyond the last 

 apparent annulation is a smooth apical projection of the axis, present also 

 in the originals of D. emarginatus. Our specimens indicate a length 

 of 45 mm and a width of 70 mm. 



Locality. Shore at Grande Gr^ve and thence to Little Gaspe. 



Dalmanites gaveyi nov. 



Plate 8, figures 8, 9 



Among the Dalmanites of these rocks, some with the snouted front of 

 Probolium, others with the crenulated anterior margin of D. anchiops 

 and D. pleuroptyx, and some having a smooth cephalic border (D. 

 m i c r u r u s and D. p h a c o p t y c h o i d e s), we are presented with a 

 species in which the frontal margin of the head bears a slight, simple, lobed 

 and blunt extension without accessory processes or crenulations similar in 

 effect to that of D. g r i f f o n i. This is a structure after the type of 

 D, vigilans Hall and D. limulurus Conrad of the Niagara, of 

 which a simple, well-lobed glabella is an accompaniment. 



This species has been observed in several examples, has a rather short 

 cephalon in which the glabella is subpentagonal, the dorsal furrows not 

 deep and rather obscure at the outer ends, the frontal lobe highly transverse, 

 right short, and merging directly into the frontal extension. The gla- 

 bellar furrows are very obscure, the first and second lobes but illy defined, 

 .slightly swollen and club-shaped but the third lobes are linear and are better 

 defined. Eyes comparatively small and not sulcate at the base, cheek 

 spines very narrow and produced. The cheeks slope somewhat abruptly to 

 a thickened and rounded edge without border. Ihe surface is marked by 

 no noticeable pustules but by a fine granular ornament. This is a very dis- 

 tinctive and rather rare type of structure expressed not so much in the 

 frontal projection as in the somewhat swollen aspect of the glabeller lobes 

 and the obsolescence of the furrows, as well as the smoothness of the surface. 

 I should bring it into comparison with my D. galea from the Lower 

 Devonic (Maecurii) sandstone of the Amazons wherein these characters 

 are pronounced. 



Dimensions. Length 12 mm, width 23 mm. One of the specimens 

 carries a considerable part of the thorax but the pygidium of this species 

 is not yet identified ; it may prove to be that described as D, v at i n i u s 



