40 Annals of the Carnegie Museum. 



The pvgidia resemble more closely those of Hemigyraspis collieana, but 

 are a little longer in proportion to the width, and have a less prominent 

 axial lobe. The genal spines are very unlike those of Isoieloides whitfieldi, 

 being circular in section and very long. 



It appears from Weller's figures that this same species occurs in New 

 Jersey. 



AsapheU.us monticola sp nov. 

 Plate XIV, figure 8. 



In a collection of fossils recently acquired by the Carnegie Museum 

 there is a nearly complete specimen of an Asaphellus collected by Monsieur 

 Jean Miquel at the Montagne Noire, Herault, France. It is such an 

 excellent example of the genus as restricted, that I can not refrain from 

 describing it. 



The form is long and narrow, the cranidium flat, the glabella not out- 

 lined, the dorsal furrows not present on the cephalon except as depressions 

 on the posterior margin. The eyes are small, situated one-third the length 

 of the head from the posterior margin. There is a very shallow neck- 

 furrow, but no neck-ring, and there is a small median pustule on the pos- 

 terior portion of the glabella. 



The thorax has eight segments, the axial lobe is one-third the total 

 width, and the pleura are deeply grooved. The pygidium is subtriangular 

 with a narrow concave border, the axial lobe is only faintly defined, and 

 there are scarcely any traces of segmentation. 



The total length of the specimen is 47 mm.; the width at the middle 

 of the thorax 23 mm. The cranidium is 18 mm. long; the pygidium 16 

 mm. long and 23 mm. wide. 



This species differs from Asaphellus homjrayi Salter chiefly in the 

 pygidium, which is narrower and has a much narrower concave border. 

 Our specimen is not distorted, but the form is much more like the com- 

 pressed specimen figured by Salter ("British Trilobites," PI. 24, fig. 6) 

 than like any of the other specimens figured. The French specimen is 

 much narrower than the Asaphellus homjrayi var. figured by Matthew. 



There is another species associated with this at the Montagne Noire 

 with a smooth cranidium, and which might be confused with the one here 

 described. This second species has, however, a short and wide cephalon 

 and pygidium, and the facial suture is of the Niobe type. It is probably 

 Hemigyraspis desiderata (Barrande). 



Locality. — The specimen here described was collected at Le Prion, near 



