Some New Species of Fussih from the Cincinnati Group. 349 



bya semi-circular depression into two short abruptly attenuate 'points, 

 obliquely striated from the medial line backwards. 



Surface. Glabella finely tuberculated. Movable cheeks very finely 

 granulated. Axial lobe smooth with a few fine punctures. Outer 

 spines of the head, pleuroe, (outer and inner surface), and pygidium 

 striated. 



Formation and locality. Upper third of the Trenton Limestone, 

 Trenton Falls, N. Y. The glabella of this species closely resembles 

 the glabella described by Prof. E. Billings as Remopleurides Cana- 

 densis, from the Chazy Limestone. Differs in the narrow palpebral 

 lobes and glabellar furrows. 



Some New Species of Fossils from the Cincinnati Gmvp and Remarlcs iipon 

 some Described Forms. By S. A. jMiller. 



Acidaspis anchoralis (p.. sp.) 



Fiff. 23; Head of Acidaspis anchoralis. 



Fig. 24. Pygidium. 

 [Etym, anchoralis anchor shaped.] 



Cephalic .shield, irregular, rough, tuberculated and spinous. An 

 outline of the margin would be represented by a depressed arc in front, 

 a slightly longer digitated and expanded arc for each cheek, and a still 

 longer arc for each of the projecting spines, while a half ellipse would 

 be formed between the projecting spine from the occipital part of the 

 glabella and each of the cheek spines. The cheeks have about twelve 

 or fourteen digitations or short curved spines on the lateral margins, 

 and about twenty prominent tubercles on the face of each, with their 

 posterior extremities produced, in a strong, round, oblique, curving spine 

 covered with numerous smaller tubercles or asperities. The eyes are 

 prominent, directed backwards, and situated near the posterior junc- 

 tion of the cheeks with the glabella. The glabella is somewhat 

 anchor shaped in outline ; the middle lobe has an expanded elevation 



