ART. 14 FOSSIL AND EECENT BRYOZOA CAITU AKD BASSLEK 161 



number of three, but, as Smitt has already noted, there are only one 

 or two tubes per row on certain small branches. Moreover, we found 

 specimens having a larger number of tubes on the branches; they 

 have a more idmoneiform aspect, although they never present true 

 alternating fascicles. 



In the two cases the ovicell is always the same. It belongs to the 

 Diaperoecia type with central oeciostome. The latter is curved 

 toward the base in a contrary direction to the peristome of the adja- 

 cent tubes. The tube which engenders the ovicell is always placed 

 in the immediate vicinity of the median longitudinal axis of the. 

 branch. 



Here the oeciostome is indeed specific, and we have not observed 

 very important variations on our specimens. On the other idmonei-- 

 form species of this genus {Diaperoecia pulcherrima Kirkpatrick,- 

 1890) its form is very different. 



The decoration of the tubes is not as beautiful as in specimens 

 from the Philippines where the specimens are highly ornamented. 

 We attribute this phenomenon to the great calm of the waters of the 

 Pacific, while in the vicinity of Florida the passage of the Gulf Stream 

 profoundly modifies the fauna. The species was in reproduction 

 March 15, 1885. 



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

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

 ken coral. 

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



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

 Gulf of Mexico, Egmont Key, Fla. Florida, 19-97 

 meters (Smitt). 

 Plesiotypes. —C&t. No. 7488, U.S.N.M. 



Genus DIPLOSOLEN Canu, 1918 



DIPLOSOLEN OBELIUM Johnston, 1838 



Plate 31, Figure 11 



1889. Diastopora obelia Jelly, A synonymic Catalogue of Marine Bryozoa, 



p. 83. (Bibliography.) 

 1896. Diastopora obelia Neviani, Briozoi Postpliocenici di Spilinga. Atti 



Accademia di Scienze Naturali in Catania, ser. 4, vol. 9, p. 60, 



(Bibliography.) 

 1901. Diastopora obelia Neviani, Bryozoi neogenici delle Calabrie. Palaeon- 



tographia Italica, vol. 6, p. 240. (Local bibliography.) 

 1905. Diastopora obelia Neviani, Briozoi fossili di Carrubare. BoUettino 



Societa Geologica Italiana, vol. 23, p. 551. 

 1907. Diastopora obelia Calvet, Bryozoaires. Expedition scientifique 



Travailleur et Talisman, p. 484. (Complementary bibliography.) 



The study of the bibliography of this species will certainly give 

 good biologic information. Its discovery to the south of North 

 58513—28 11 



