NO. 3 CASSIDULOID ECHINOIDS — KIER II5 



Remarks. — Lambert and Thiery (1924, p. 387) considered Pro- 

 gonolampas as a subgenus of Echinolampas characterized as having 

 simple round, noncon jugate pores. However, the pores are not simple 

 (see pi. 32, fig. 5), but are strongly conjugate, with the outer pores 

 slightly elongated transversely. I agree with Mortensen (1948, p. 

 278) in considering Progonolampas as a synonym of Echinolampas. 



Bittner evidently had not seen Gregory's paper when he described 

 his species P. novae-hollandiae. His species is identical with Greg- 

 ory's E. posterocrassus. Gregory's paper was published just two 

 years before Bittner's. 



Psammolampas Lambert, 1913. Mem. Soc. Pal. Suisse, vol. 39, p. 136. Type 



species by original designation, Echinolampas sciitiformis Desmoulins. 

 Sctitolampas Lambert, 1906. Ann. Soc, Alpes-Maritimes, vol. 20, p. 33. Type 



species by original designation, Conoclypus plagiosomus L. Agassiz (•=Echino- 



lampas hicae (Desor). 

 Sphelatiis Pomel, 1883. Class, meth., p. 54. Type species by monotypy, 



Caratomus lehoni Cotteau. 



DESCRIPTION OF TYPE SPECIES 



ECHINOLAMPAS LEHONI (Cotteau) 



Plate 32, figures 2-4 ; text figure 95 



Caratomus lehoni Cotteau, 1880. Mem. Acad. Roy. Sci., Lett, ct Beaux-arts de 

 Belgique, vol. 43, p. 25, pi. 2, figs, 14-20. 



Material. — I studied the holotype, which is the only specimen 

 known of this species. 



Shape. — Very small, 9.5 mm. long, marginal outline circular except 

 for slight posterior prolongation ; highly inflated with steep but 

 smoothly curved sides, slight oblique posterior truncation ; adoral 

 surface smoothly depressed around peristome. 



Apical system. — Anterior, very large relative to size of test, elon- 

 gate, monobasal, madreporite elevated, pierced with approximately 

 13 pores, no genital pores. 



Ambulacra. — Ambulacrum HI not petaloid, petals H and IV short, 

 curving anteriorly (text fig. 95), no petaloid pores in anterior porif- 

 erous zones, 14 pore pairs in petaloid portions of posterior poriferous 

 zones ; petals V and I extending halfway to margin, with slight tend- 

 ency to close distally, interporiferous wider than poriferous, taper- 

 ing slightly distally ; poriferous zones unequal, right zone of petal I 

 with two more pore pairs than left, left zone of petal V with two 

 more pore pairs than right; pores conjugate, outer pores slightly 

 elongated transversely, inner circular. 



