194 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



1909. Caberea boriii NORMAN. The Polyzoa of Madeira and neighboring islands, Journal 

 Linnean Society, London, Zoology, vol. 30, p. 235. 



1912. Caberea boryi CANU, fitude coniparee des Bryozoaires Helvetieus de 1'Egypte avec 

 les Bryozoaires vivants de la Mediterranee et de la Mer Rouge, Memoires Institut 

 Egyptien, vol. 6, p. 19S, pi. 10, fig. 17 (gives paleontological references). 



Affinities. Our unique specimen appears to us correctly determined within 

 the limits compatible with the extreme fragility of this small fossil. As in the 

 fossil representative from Egypt, the opesium measures 0.20 mm. by 0.12 mm. 

 Traces of the scutum are visible on almost all of the zooecia, which prevents this 

 specimen from being identified with Caberea ellisi Audouin. We have not noticed 

 the occurrence of distal spines. Therefore this is not Caberea darwini Busk. How- 

 ever, the small frontal avicularhim placed near the zoarial axis appears more trian- 

 gular. 



Occurrence. Vicksburgian (Glendon member of Marianna limestone) : West 

 bank of the Conecuh Eiver, 1 mile below mouth of Sepulga River, Escambia 

 County, Alabama (very rare). 



Habitat. Atlantic: Madeira Islands. English Channel, and British waters 

 generally. Pacific: New Zealand and Australia. Mediterranean and Adriatic. 



Although floating and parasitic on marine algae this species has been found 

 in the Mediterranean at depths from 70 to 100 meters, but we are ignorant as to 

 whether the specimens were living. The species has never been observed off either 

 the Atlantic or Pacific coast of America, where it is replaced by Caberea ellisi 

 Audouin, 1826. (Robertson, Osburn). Its presence in Madeira renders its dis- 

 covery in Florida very probable. 



Geological distribution. Miocene of Australia (Waters) ; Helvetian of Egypt 

 (Caiiu) ; Zanclean of Italy (Segnenza) ; Sicilian of Italy (Seguenza and Stefani) ; 

 Quaternary of Italy (Seguenza, Neviani, Waters). 



Plesiotype.Cnt. No. 64246, U.S.N.M. 



Family FARCIMINARIIDAE Busk, 1852. 



The zooecia are furnished with an obliquely ascending distal wall and sepa- 

 rated by common lateral walls, which are furnished with a small number (2-4) of 

 uniporous septulae; no true spines. The avicularia dependent, sometimes depressed, 

 sometimes strongly projecting. The oviceHs are endozooecial. The zoaria are 

 dichotomously branched tufts, with slender, prismatic, sometimes jointed segments, 

 on which the zooecia are arranged in longitudinal rows (generally 4-6) around an 

 axis formed by the adjoining separating walls. (After Levinsen, 1909.) 



There have as yet been no anatomical researches on the representatives of the 

 family. 



The known genera are as follows, the last one alone being represented in our 

 American collections : 



Columnaria Levinsen, 1909". 



Farciminama Busk, 1852. 



Ndlia Busk, 1852. 



