78 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I44 



Rcvtarks. — I have studied three specimens of the type species in 

 the Lambert Collection at the Sorbonne, Paris. One of these speci- 

 mens was figured by Lambert. His description of this species (1892, 

 p. 84-89) is so thorough and accurate that it is not necessary to 

 redescribe it here. I include photographs (pi. 11, figs. 6, 7) and a 

 drawing of a phyllode (text fig. 62) of his specimen. 



Duncan (1891, p. 187), Lamber and Thi^ry (1921, p. 350), 

 Mortensen (194S, p. 165, 167), and Cooke (1953, p. 17) have 

 considered AntJwbrissus a synonym of PJiyllohrissus. Although it 

 differs from the type species of PJiyllobrissus in being more elongate, 

 having slightly narrower petals, and in having its periproct more 

 anterior, these differences do not seem of sufficient importance to 

 warrant generic distinction. 



Synonym of PHYLLOBRISSUS 



Astcrobnssiis De I.oriol, 1888. Mem. Soc. Phys. Hist. Nat. Geneve, vol. 30, 

 p. 104; pro Trochalia Pomel, 1S83. Class, metli., p. 60; non Sharpe, 1850, a 

 mollusk. Type species, Echiuobrissus requiem Desor (in Agassiz and Desor, 

 1847) bj' subsequent designation, Kier, herein. 



Remarks. — Because of the invalid designation of a type species, 

 Lambert, Mortensen. and others have misunderstood this genus. 

 Lambert (m Demoly and Lambert, 1913, p. 204) designated Astcro- 

 hrissus fourtani as the type species of Astcrohr'issns. However, since 

 this species was not included among those referred to Trochalia in 

 Pomel's original description of the genus, or in De Loriol's description 

 of Astcrobrissus, it cannot be considered as the type species. Lambert 

 stated that when Pomel erected his genus, and included Echinobrissus 

 I'equiciii Desor among its species, he was not referring to the typical 

 E. rcquicni but to some specimens of another species which had been 

 wrongly referred to E. rcquicni. Lambert named this other species 

 Astcrobrissus fourtaui and designated it as the type species. Even 

 though Pomel may have been referring to these specimens when he 

 made his genus, he used the name E. rcquicni Desor, and it and the 

 other species he and De Loriol named are the only ones that can be 

 considered in selecting the type species. 



I have not seen any specimens of E. rcquicni, but from a study of 

 the illustrations by d'Orbigny (1856, pi. 963, figs. 6-10), it resembles 

 closely the type species of PJiyllobrissus, P. grcssiyi (Agassiz), mak- 

 ing Astcrobrissus a synonym of PJiyllobrissus. Most of the other 

 species that Pomel referred to TrocJtalia should be placed in Petalo- 

 brissus. I have studied specimens of Lambert's Astcrobrissus fourtaui, 

 and believe that this species is a PJiyllobrissus. It is similar to 

 P. grcssiyi in petal arrangement, tetrabasal apical system, supra- 



