112 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



Remarks. — All authors have considered C. plagiosomus as the type 

 species of Hypsoclypus. However, C. plagiosomus is a junior sub- 

 jective synonym of C. lucae. L. Agassiz's (1840a, p. 5) Conoclypus 

 plagiosomus is a nomen nudum. Agassiz and Desor (1847, P- 168) 

 described two species, Conoclypus plagiosomus and Conoclypus lucae, 

 and later Desor (1858, p. 322) made C. plagiosomus a junior sub- 

 jective synonym of C. lucae. Many authors have stated that C. 

 plagiosomus is the type species of Hypsoclypus, but their action has 

 not been a valid designation of C. lucae, even though it is a synonym, 

 because none of these authors stated in the same publication that C. 

 plagiosomus =C. lucae. 



Mortensen (1948, p. 316) is mistaken when he states that there 

 are no true phyllodes in Hypsoclypus, and that the pores are arranged 

 in single series. The phyllodes are very well developed, being wid- 

 ened near the peristome, and with three series of pores in each 

 half -ambulacrum. 



This genus cannot be distinguished from Echinolampas. Appar- 

 ently the only character that served to distinguish Hypsoclypus, 

 other than the mistaken idea that it had no phyllodes, was its great 

 size, but a young specimen of the type species would have to be 

 referred to Echinolampas. 



Hypsoheteroclypeus Szorenyi, 1953. Geol. Hung., ser. Palaeont., vol. 23, p. y6. 

 Type species by original designation, Hypsoclypus doma Pomel. 



Remarks. — Szorenyi established her Hypsoheteroclypeus as a new 

 name for Hypsoclypus and Heteroclypeus, believing that her action 

 would reduce the confusion resulting in the use of these latter two 

 names. However, since both Hypsoclypus and Heteroclypeus are 

 older names, her Hypsoheteroclypeus cannot stand. Echinolampas 

 domn is very similar to the Echinolampas lucae (Desor) (=£. pla- 

 giosomus (L. Agassiz) and certainly congeneric with it. 



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

 species by original designation, Echinolampas gaujoni Pomel. 



Libyolampas Lambert, 1914. Revue paleozool., vol. 18, p. 112. Type species by 

 original designation, Echinolampas africanus De Loriol. 



Macrolampas Lambert, 1906. Arm. Soc, Alpes-Maritimes, vol. 20, p. 33. Type 

 species by original designation, Clypeaster hemisphericus Lamarck. Drawing 

 of a phyllode is included (text fig. 97). 



Merolampas Pomel, 1883. Class, meth., p. 63. Type species, Echinolampas 

 mattsensis Quenstedt, by subsequent designation, Lambert (1918, p. 44). 



Miolampas Pomel, 1883. Class, meth., p. 62. Type species, Echinolampas 

 depressa Gray, by subsequent designation, Lambert (1918, p. 44). A photo- 

 graph of the adapical surface (pi. 31, fig. 2) and a drawing of a phyllode 

 (text fig. 91) is included. 



