ECHINODERMATA. 



163 



No. 807. Faujasia apicalis, D'Orb. 



(Syn. Py gurus apicalis, Desor.) This species is conical, with the ambulacral 

 summit a little eccentric, and the mouth subcentral. From the Upper Chalk of 

 Maestricht, Holland. Price, $0.20. 



No. 808. Pygorhynchus G-rignonensis, Agass. 



In this species,"the posterior side is truncated, 

 the under side concave, and the mouth a little more 

 eccentric than the summit. Itis the Nueleolites 

 Grignonensis of Defrance. It characterizes the Cal. 

 caire Grossier (Middle Eocene Tertiary) in the envi- 

 rons of Paris. Price, $0.20. 



No. 809. Pygurus Blumenbachii, Agass. 



This genus, of the group Nueleolites, is akin to Echinolampas. It has 

 a very prominent anal beak, eccentric mouth and summit, and lanceolate petals. 

 From the Coral Rag (Middle Oolite), Tonnerre, France. Original in the private 

 Geological Cabinet of Mr. Ward^ Rochester. Price, $0.85. 



No. 810. Pygurus Davoustianus, Cott. 



From the Great Oolite, Sarthe, France. Price, $0.40. 



No. 811. Pygurus lampas, Beche. 



(Syn. Pygurus trilobus, Agass.) From the Upper Greensand (Cretaceous), 

 Lemans, France. Price, $0.35. 



Clypeastridse,. 



No. 812. Clypeaster altus, Lam. 



Two specimens. This genus, one of 

 the true Clypeastridae, includes the lar- 

 gest of sea-urchins. The shell is ob- 

 long ; mouth angular and furnished 

 with well developed teeth ; tubercles, 

 mere granules, and the spines propor- 

 tionally small. The shell of this species 

 is subpentagonal, and the ambulacral 

 portion is much elevated. These specimens— from the Eocene Tertiary of the 

 Isle of Malta— are now in the Ward Museum of the University of Rochester. 



Size of each, 6x5. Price, $1.50. 



No. 813. Clypeaster grandiflorus, Bronn. 



A smaller and flatter form from the Miocene Tertiary, Montpelier, France, 

 and in the same Museum as the preceding. Price, $0.50. 



No. 814 Clypeaster umbrella, Agass. 



This inflated form, with interambulacra rising into ribs, is from the Miocene 

 Tertiary, Sardinia, and belongs to the Ward Museum, University of Rochester. 



Price, $0.75. 



No- 815. Laganum ellipticum, Agass. 



This Clypeastroid with lanceolate petals is small, elliptical, and depressed. 

 From the raised Beaches (Recent), east shore of the Red Sea, Arabia, and now 

 in the Ward Museum, University of Rochester. Price, $0.25. 



