l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 128 



Type. — The holotype of Trisegmentina compressa Wiesner (Side- 

 bottom's Hauerina compressa d'Orbigny) is in the British Museum 

 (Natural History), 



Discussion. — Wiesner first described this genus in 1920 and not in 

 1931 as stated by Cushman (1948, p. 198), or in 1923 as stated by 

 Ellis and Messina (Catalogue of Foraminifera) . Originally described 

 without naming species, Hauerina compressa Sidebottom was later 

 cited by Wiesner (1931, p. 70) as type species. This was the species 

 described by Sidebottom (1904, p. 19) as Hauerina compressa 

 d'Orbigny. Cushman (1933, p. 165) renamed Sidebottom's form 

 Trisegmentina sidehottomi, but this name must be considered merely 

 a junior synonym of Trisegmentina compressa Wiesner, 1931. This 

 case is covered in detail in the recent Copenhagen Decisions on Zoo- 

 logical Nomenclature by Hemming (1953, p. 68). Quoting Hemming 

 (p. 69), "A similar unsatisfactory situation arises where an author 

 of a generic name, without designating a type species for the nominal 

 genus so established, places in it a species under a name which he 

 clearly indicates that he is using in a different sense from that of its 

 original author, and the species so indicated is the first of the included 

 species to be selected as the type species under Rule (g) in Article 30." 

 In such a case as this "the type species of the new genus is to be 

 treated as having been given a new binomen composed of the cited 

 generic name and of a specific name consisting of the same word as 

 that borne by the species under which the type species was erroneously 

 cited by the author of the new generic name." Thus the type species 

 must be cited as Trisegmentina compressa Wiesner, 1931, and Cush- 

 man's name T. sidehottomi is a junior synonym. 



The figures given by Sidebottom (1904, pi. 5, fig. 8) show an aper- 

 tural plate with pores (trematophore). An examination of the type 

 specimen (B.M.N.H.) showed this apparent pore plate to be a frag- 

 ment of extraneous calcareous material lodged in the aperture, but 

 not an actual part of the specimen. The form is thus merely a Plani- 

 spirina, and as Planispirina was described by Seguenza in 1880, the 

 name Trisegmentina Wiesner is here suppressed as a junior synonym. 



Genus POLYSEGMENTINA Cushman, 1946, emended 

 Plate 3, figures 1-3 



Original description. — Contr. Cushman Lab. Foram. Res., vol. 22, 

 pt. I, p. I, 1946. 



Type species. — Hauerina circinata Brady, 1881. Original des- 

 ignation. 



