This genus is allied to both Trinudeas and Ampyx. From the former 

 it differs in the absence of the punctured border of the head ; from the 

 latter, in the form of the glabella, which has a large tubercle on each side, 

 and is destitute of a rostrum. 



Endymion Meeki. (N. sp.) 



Fig. 84. 

 Fig. Q^.-— Endymion Meeki, enlarged two diameters. 



Description. — Broad oval ; length to width about as 5 is to 4. Head 

 transversely semi-oval ; glabella convex, depressed semi-cylindrical in the 

 posterior half of the length, then expanding to twice the width of the 

 neck-segment, front obtusely rounded ; glabellar furrows represented by 

 two obscure indentations on each side, of which one is situated at about 

 the mid-length, and the other half-way between this and the neck-segment. 

 Neck furrow extending all across. Neck segment convex, and well defined. 

 On each side of the glabella there is an elongated fusiform lateral lobe or 

 large tubercle, separated from the main body of the glabella by the dorsal 

 furrows, which are moderately deep. These lateral lobes are also sepa- 

 rated from the cheeks by a furrow distinctly defined, but broader than the 

 dorsal furrows. The anterior extremities of the lobes are acute, and situ- 

 ated on a line drawn across the glabella at about one-fourth of the length 

 from the front margin thereof. The posterior extremities are a Httle tnmca- 

 ted by the neck furrow. The glabella is about four-fifths the whole length 

 of the head. The cheeks are moderately tumid, and crossed at the base 

 by the neck furrow, which runs nearly out to the posterior angle, and then 

 seems to turn forward as if it were continued all round the head. 



Thorax distinctly trilobed, with six segments visible in the specimen, it 

 remaining doubtful whether or not there is a seventh situated where a 

 fracture crosses the body, just behind the first segment next the head. 

 Axis of thorax semi-cylindrical, very convex, a little wider in the middle 

 than at the extremities ; less than one-tliird the whole width of the body. 

 Side lobes, as far as seen, flat. Pleural groove crossing the pleurae out- 

 wards and downwards in the outer tliird of the length, gradually becoming 

 parallel with the posterior side, and then curving slightly forwards. 



