20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



It is possible that the anterior truncation and OA^erhang of the 

 glabella of the Girvan type of this proposed new species was empha- 

 sized by pressure and oblique position of the cranidiuni with 

 respect to the bedding plane of the matrix. But if this explanation 

 of its present extraordinary appearance is correct it would at the 

 same time imply uncommon original length of glabella. Under the 

 circumstance I feel warranted, at least provisionally, in proposing 

 the above new name for this Girvan species. 



Occurrence. — Whitehouse group, Whitehouse Bay, Girvan District, 

 Scotland. 



TELEPHUS? SALTERI Reed 



Plate 2, Figure 14. 



Telephus saltcri Reed, 1914, Supplement Lower Paleozoic trilobites of 

 Girvan, Paleontog. Soc, p. 16, pi. 2, fig. 11. 



OHginal description. — 



Specific Characters. — Head transversely elliptical. Glabella sub-cylindrical, 

 slightly expanded at front end and projecting a little beyond cheeks, abruptly 

 truncate, moderately convex, more than twice as long as wide at base ; surface 

 coarsely tuberculated. Axial furrows parallel for three-fourths length of gla- 

 bella, diverging slightly at front end. Meso-occipital furrow distinct, marking^ 

 off rounded smooth depressed meso-occipital ring, widest in middle. Cheeks 

 rounded, nearly semi-elliptical, widest behind middle, rather wider than glabella, 

 gently convex, witli rather broad smooth flattened border extending round them 

 and ending against glabella in front and at meso-occipital ring behind ; marginal 

 furrow strong ; surface of cheeks granulated and with a few coarse tubercles on 

 outer half. 

 Dimensions. — 



Length of head-shield 3.6 mm. 



Length of glabella 2.8 mm. 



Width of head near base 5.4 mm. 



Width of glabella at base 1 1.5 mm. 



Width of cheek, (maximum) 2.1 mm- 



Remarks. — There is only one specimen of this curious little trilobite available, 

 but with the exception of the front end of the glabella it is well pi*eserved. It 

 is uncertain if a pair of anterior spines is present as in T. bicuspis, Aug., which 

 it much resembles, though the cheeks in ours are relatively broader and more 

 semi-elliptical and the glabella more cylindrical, and the neck-ring smooth and 

 projecting behind the cheeks. 



Judging from the description and figure of the holotype of this 

 species it stands well apart from all others now known. Indeed, and 

 particularly in view of the general sameness of the 20 or more other 

 species of the genus, I doubt very much that its reference to Telephus 

 is quite justifiable. The others in no case suggest that normal specific 

 modification of the generic characters could produce the unheralded 

 structural pecularities of T. salteri. Among the more striking of 

 these is the relative narrowness of the glabella and, especially, its 

 anterior expansion. Equally unexpected is the shape of the fixed 



