ART. 14 FOSSIL AND EECENT BRYOZOA CANU AISTD BASSLER 67 



Albatross Station D. 2639 Straits of Florida; 25° 04' 



50" N.; 80° 15' 10" W.; 56 fms.; coral sand. 

 Fowey Light, 15 miles south of Miami, Fla., 40 fms. 

 Pliocene : Minnitimmi Creek, Bocas Island, Almirante 



Bay, Panama. 

 Florida, 24-60 meters (Smitt) ; Tortugas, 24 meters 

 (Osburn); Caribbean Sea, Pedro Bank, Jamaica, 

 16-19 m. (Harmer); St. Vincent (Harmer), Atlan- 

 tic; Bermuda (Verril). 

 Geographic distribution. — Atlantic: Abrothos Island, Brazil, 32 

 meters. Pacific: Honolulu, 32-64 meters; Port Molle, Queensland, 

 18-32 meters; Torres Strait, 16-32 meters; various localities in the 

 Malay Peninsula and the Philippines; Japan, slight depth to 320 

 meters; China Sea, Singapore, 19 meters; Tizard Reef, 43 meters; 

 Borneo and Hong Kong. Indian Ocean: Almirante Island, 32-40 

 meters; Wasin, British East Africa, 16 meters; Chuaka, Zanzibar 

 Channel, 3 meters. 



Geologic distribution. — Miocene and Pliocene of Florida. 

 Plesioty pes. —Ceit. Nos. 7597, 7598, 70860, U.S.N.M. 



STEGANOPORELLA BREVIS, new species 



Plate 32, Figure 7 



Description. — The zoarium is unilamellar. The zooecia are dis- 

 tinct, united by their mural rim, little elongated, short, rectangular or 

 hexagonal; the interior mural rim is wide, finely granulated, oblique; 

 the cryptocyst is large, concave, smooth. The opesium is semiellip- 

 tical, transverse, limited distally by a vestibular arch; the polypidan 

 tube is small, median, little salient, placed between the two opesiules. 

 The large zooecia (B) have the form of an 8; the opesium is very 

 large; the distal plate is very small and reduced to an arched slit 

 placed between the mural rim and a salient cushion. 



Measurements. — Ordinary zooecia (a)], " ^ "^ ^ «^ ' 



•^ ^ ^[lz = 0.60-0. 70 mm. 



^ . \ho = 0.15 mm. 

 Opesmm^, _ ^_ 

 ^ Uo = 0.25 mm. 



n ■ 1 ' . ,„ Jig =1.05 mm. 



Avicularian zooecia (isji 7 ^ _^ 



^ ^[h = 0.75 mm. 



^ . [^.0 = 0.30 mm. 



Affinities. — This species is very well characterized by the form and 

 the nature of the B zooecium with an avicularian operculum. It is 

 smaller than Steganoporella magnilabris Busk, 1854, which is so widely 

 distributed in the Gulf of Mexico. 



Occurrence. — Pliocene : Minnitimmi Creek, Bocas Island, Almirante 

 Bay, northwest Panama. 



Holotype.—Csii. No. 70859, U.S.N.M. 



