210 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



presence of a naked, granular zone adorally. However, many of the 

 species they refer to EcJiinanthus also have a low periproct notched 

 at the margin, and a few of them have the naked granular zone. 



Cotteau (1888, Pal. franc, Tert., pi. 154, fig. 6) shows a tetra- 

 basal apical system in Gitolampas issyavicnsis Munier-Chalmas. I 

 have studied this figured specimen in the Cotteau Collection at the 

 ficole National Superieure des Mines in Paris and found a monobasal 

 apical system. Furthermore, in Cotteau's figures of the floscelle of 

 this species and all the other species he figured of Gitolampas, he 

 shows double pores in each ambulacral plate of the phyllodes, whereas 

 they are single pored (text fig. 173). Photographs of this specimen 

 are included on plate 42, figures 7-9. 



DESCRIPTION OF TYPE SPECIES 



GITOLAMPAS TUNETANA (Gauthier) 

 Plate 42, figures 1-6 ; text figure 175 

 Pliolampas hmetana Gauthier, 1889. fich. foss., Tunisie, p. 99, pi. 6, figs. 7-9. 



Material. — Holotype and two figured specimens studied. 



Shape. — Small to medium size (holotype, 30 mm. long), elongate, 

 posterior extremity pointed, greatest width posterior to center, mar- 

 gins rounded, adapical surface smoothly convex; adoral surface de- 

 pressed around peristome. 



Apical system. — Anterior, monobasal, madreporic pores numerous, 

 occurring over most of apical system, four genital pores. 



Ambulacra. — Petals long, extending almost to margin, wide, with 

 tendency to close distally ; posterior petals longer than others. Inter- 

 poriferous zones two to three times width of poriferous zones, with 

 greatest width one-third distance from apical system to extremity of 

 petal; poriferous zones narrow, with greatest width at midlength of 

 petal; pores conjugate, outer pore elongated transversely, inner pore 

 less elongated. 



Periproct. — Marginal to inframarginal, longitudinal, on projected 

 posterior extremity. 



Peristome. — Anterior, large, subpentagonal. 



Floscelle. — Bourrelets well developed, vertical walled. Phyllodes 

 (text fig. 175) broadened, single pored, with two series of pores in 

 each hal f -ambulacrum : approximately 10 in each outer series; 3 to 5 

 in each inner; buccal pores present. 



Occurrence. — Upper Cretaceous (Carapanian), Djebel Blidji ; 

 Djebel Chebika, Mides, Tunisia. Gauthier considered this species to 



