ART. 14 FOSSIL AND EECEIS'T BRYOZOA CANU AXD BASSLEE 27 



The colonies are attached to sponges and occasionally to shells 

 (Osburn). The radical tubes spring out from the middle of the front 

 side just below the apertural area of the zooecia (Smitt) . 



Occurrence.— Albatross Station D. 2405, Gulf of Mexico; 28° 45' 

 00" N. ; 85° 02' 00" W. ; 30 fms. ; gray sand, broken 

 coral. 

 Albatross Station D. 2407, Gulf of Mexico; 28° 47' 

 30" N.; 84° 37' 00" W.; 24 fms.; coral, broken 

 shells. 

 Florida, 21-222 meters (Smitt); Tortugas, 16-29 

 meters (Osburn); Texas and St. Thomas, West 

 Indies (Levinson). 

 Pliocene: Minnitimmi Creek, Bocas Island, Almirante Bay, Pan- 

 ama. 



Geographic distribution. — Pacific: Torres Strait, Bass Strait, Queens- 

 land, Victoria, Cape Grenville, Cape Joubert (23 meters) , Gasparstrasse 

 (29 meters), Phihppines, Heard Island, and Crozet Island. Indian 

 Ocean: Mergui Archipelago, Gulf of Arabia, Ceylon, Sudanese Red 

 Sea, Zanzibar, Wasin. Atlantic : Bahia, Brazil. 



Geologic distribution. — Eocene (Lutetian) of the Paris Basin (Canu) ; 

 Oligocene (Vicksburgian) of Alabama and Mississippi (Canu and 

 Bassler); Miocene (Burdigalian) Cercado de Mao, Santo Domingo 

 (Canu and Bassler) ; Miocene (Helvetian) of Touraine and Egypt 

 (Canu) ; Miocene of Australia (MacGillivray) . 



Family ALDERINIDAE Canu and Bassler, 1927 



This family was proposed for all the Membraniporae in which the 

 ovicell is hyperstomial. It comprises, therefore, groups 3 and 4 of 

 our classification of 1920. It is probable that certain articulated 

 genera will some day be classed in this family, but their larval sys- 

 tem not being known, it is preferable to leave them where their 

 authors have placed them. There are also some exceptions to make 

 regarding the genus AmpJiiblestrum, of which the anatomy is abso- 

 lutely unknown; some species belong perhaps to the Opesiulidae. 



Genus ALDERINA Norman, 1903 



ALDERINA IRREGULARIS Smitt, 1873 



Plate 3, Figure 3; Plate 32, Figure 4 



1873. Membranipora irregularis Smitt, Floridan Bryozoa. Kongl. Svenska 



Vetenskaps-Akademiens Handlingar, vol. 11, p. 8, pi. 11, fig. 63. 

 1914. Membranipora irregularis Osbtjbn, The Bryozoa of the Tortugas 



Islands, Florida, Publication Carnegie Institution, Washington, 



No. 182, p. 194. 

 1920. Alderina irregularis Canu and Bassler, North American Early 



Tertiary Bryozoa. Bull. 106, U. S. National Museum, p. 142. 



(Not D'Orbigny, 1839, Waters, 1904, Busk, 1861, Manzoni, 1875.) 



