OF THE SPECIES. 91 



4. Ph. srierops : Protubcriuitiie frontalis lobo antico maximo rcnlfoniii, lobo quarto minuto, rcliquis 

 abrupte augustiori ; rliachi cauthe H aiuuilata, costis latcralibus sex. Long. 114-2." Table IV, Figs. 

 5-6. 



R(f. — Ca/j/m. sclerops, Dalm. Palcead, 39. 5. Milne Edw. Crust, iii, 322. 9. Phac. 

 sderops, Emmr. Dmert. 22. 8. Pander, Beitr. 138, Tab. XLVIII, Fig. 9, Tab. V, 

 Fig. 4, Tab. VI, Fig. 10. 



Zoc.— Swedish limestone at Husbj'fjol, in East Gothland; in gray limestone near 

 Skarpasen ; in red limestone near Furudal ; in Dalecarlia in red limestone. 



This distinct species can readily be known by the peculiar form of its glabella, which 

 consists of five lobes, of which the anterior and largest is singularly wide, and projects 

 laterally over the eyes ; the second is narrower and posteriorly smaller, the eye corresponds 

 with it ; the third is a very small narrow lobe, and the fourth has pretty much the same 

 size as the margin of articulation following it. The eyes are large and prominent, the 

 facial suture is distinct (Dalman was the first who described the facial suture in this species 

 as terminating in the lateral margin) ; the posterior cephalic angles are obtuse. The axis 

 of the tail consists of four distinct, and four rather more indistinct rings, and has from six to 

 seven lateral ribs ; its extremity is obtuse, and so also is the front of the cephalic 

 shield. 



Remark. — From examining a great number of specimens, I have had an opportunity of convincing 

 myself that this species does possess long projecting angles at the cephalic shield, and thereby approxi- 

 mates so near to Ph. conophthalmus of Boeck, that I am inclined to doubt their specific distinctness. 



5. Pli. cunuphtliulinus : Protuberantia frontali antice latissima, posticum versus valde coarctata ; 

 oculis minutis ; rhachi caudae 7 annulata, costis laterahbus 9. Long. 2K". 



Ref. — Emmr. Dissert. 21.7. Boeck, Gaea Norm, i, 4. 



Loc. — The yellowish gray limestone of Revel, and Ladegaards Oen at Cliristiania ; found 

 likewise in boulders at Gussow, in Mecklenburg (Berlin Museum). 



This singular species resembles the preceding one in the formation of the glabella, 

 but is readily distinguished by the pointed angles of the cephalic shield. The anterior 

 large lobe of the glabella has an oblique rhombic form with rounded angles ; the 

 second is obtusely trilateral, rather truncated towards the posterior part ; the third is the 

 smallest, and is rather narrower than the margin of articulation which follows it. The eyes, 

 which are not large, correspond merely to the second lobe of the head. The facial suture 

 is very distinct. The cephalic shield, which is very broad at the sides and rounded off at 

 the anterior part, is rendered conspicuous by a sharp point at the posterior extremity, 

 which point is about as long as the four first body rings ; the caudal shield has a ten- 

 jointed rounded axis, obtuse at the posterior part, and nine diagonally-furrowed latei-al ribs ; 

 it is much smaller than the cephalic shield, and not pointed at the end, but perceptibly 

 incurved. When rolled up, this incurvation is closely embraced by the under margin of the 

 cephalic shield. 



Remarks — 1 . The cephalic shield from the transition limestone of llevel, figured by ScLlotheim in 

 Leonhard's Taschenbuch, 1810, Table I, Fig. 6, I consider as most decidedly belonging to this species. 



.2. Cahjmene microps (Green, Mon. p. 34; Milne Edw. Crust, iii, 326. 17) is very nearly allied to 

 the species just described, and may perliajjs be the same. 



