220 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



(if P. pusillns Penecke is included) species known in this genus. 

 I have studied the type specimen of P. buccalis Peron and Gauthier, 

 and P. gauthieri Cotteau, and a figured specimen of P. trigeri, all 

 of which are in the Lambert Collection at the Sorbonne. The type 

 specimen of P. lorioli Cotteau was seen in the De Loriol Collection 

 at the Museum d'Histoire Naturelle, Geneve, Switzerland, and a 

 specimen of P. maresi (Cotteau) in the Cotteau Collection at the 

 £cole National Superieure des Mines in Paris. The type specimen 

 of P. excentriciis and P. anteciirsor (Duncan and Sladen) are in the 

 collections of the Geological Survey of India at Calcutta, and were 

 not seen. 



DESCRIPTION OF TYPE SPECIES 



PSEUDOPYGAULUS TRIGERI (Coquand) 



Plate 43, figures 5-8 ; text figure 179 



Catopygus trigeri Coquand, 1862. Mem. Soc. Emulation de la Provence de 

 Constantine, vol. 2, Marseille, p. 274, pi. 31, figs. 14-16 (labeled Pseiido- 

 pygauliis trigeri on plate explanation). 



Material. — Four specimens studied in the Cotteau Collection in the 

 ficole National Superieure des Mines in Paris, including a figured 

 specimen (Cotteau 1887, pi. 126, figs. 5-10), and one figured specimen 

 (Cotteau, op. cit. pi. 126, figs. 1-5) in the Gauthier Collection which 

 is in the Lambert Collection at the Sorbonne, Paris. All the speci- 

 mens are silicified, and some of them are very well preserved. 



Shape. — Small, 20 mm. long, elongate with pointed posterior 

 margin, inflated adapical surface with greatest height anterior at 

 apical system ; adorally flattened except for depressed area around 

 peristome. 



Apical system. — Anterior, monobasal. 



Ambulacra. — Anterior ambulacrum not petaloid, with two series 

 of pores, each ambulacral plate single pored. Other ambulacra 

 petaloid, broad, closed, petals II and IV slightly shorter than petals I 

 and V; interporiferous and poriferous zones wide, tapering distally. 

 Pores strongly conjugate, outer pore elongated transversely, inner 

 less elongated, joined by deep groove. 



Periproct. — Inframarginal, triangular, wider than high. 



Peristome. — Anterior, oval, wider than high. 



Floscelle. — Bourrelets not inflated ; phyllodes not broadened, single 

 pored with slight crowding of pores (text fig. 179), one or two 

 pores occluded in each half -ambulacrum. Buccal pores present. 



