GULF OF MEXICO 



271 



Family PLUMULARIDAE 



Aglaopheiiia allmani Nutting, 1900. K, T; Ca. 

 Aglaophenia aperla Nutting, 1900. C, NE. 

 Aglaophenia hiconuila Nutting, 1900. C. 

 Aglaophenia ? constricta Allman, 1877. K. 

 Aglaophenia cristifrons Nutting, 1900. C, NW. 

 ? Aglaophenia dichotoma Kirclienpauer, 1872. NE. 

 Aglaophenia duhia Nutting, 1900. K, T, C; Ca, EP. 

 Aglaophenia elongata Menegliini, 1845. NE. 

 Aglaophenia flowersi Nutting, 1900. K; Ca. 

 Aglaophenia late-carinata Allman, 1877. K, T, NW; 



Ca. 

 Aglaophenia longiramosa Eraser, 1945. NE. 

 Aglaophenia lophocarpa Allman, 1877. K, T, C, NE; 



Ca, EP. 

 Aglaophenia ? mercatoris Leloup, 1937. NE. 

 Aglaophenia perpusilla Allman, 1877. K, T, NW; 



Ca. 

 Aglaophenia raridentala Eraser, 1944. K. 

 Aglaophenia rhynchocarpa Allman, 1877. K, T, C; 



Ca. 

 Aglaophenia rigida Allman, 1877. K, NW; Ca, EP. 

 Aglaophenia Iridentata Versluys, 1899. K, T; Ca. 

 Aglaophenoides mamniiUala (Nutting, 1900). T. 

 Aglaophenopsis hirsuia Fewkes, 1881. K. 

 Antennella gracilis Allman, 1877. K, C; Ca, EP. 

 Antennella quadriaiirita Ritchie, 1909. K, C. 

 Antennella secundaria (Gmelin, 1788). T; Ca. 

 Antennopsis distans Nutting, 1900. C. 

 Antennopsis hippuris Allman, 1877. K. 

 Antennopsis longicnrna Nutting, 1900. C. 

 Antennopsis nigra Nutting, 1900. C. 

 Antennularia simplex Allman, 1877. K, C. 

 Cladocarpns carinatus Nutting, 1900. T. 

 Cladocarpus dolicholheca Allman, 1877. K, T. 

 Cladocarpus flexilis Verrill, 1885. NE. 

 Cladocarpus flexuosus Nutting, 1900. NE. 

 Cladocarpus longipinna Eraser, 1945. NE. 

 Cladocarpus ohliquus Nutting, 1900. C. 

 Cladocarpus paradisea Allman, 1877. K. 

 Cladocarpus sigma (Allman, 1877). K, C. 

 Cladocarpus tenuis Clarke, 1879. T; Ca. 

 Cladocarpus ventricosus Allman, 1877. K. 

 Diplopteron longipinna Nutting, 1900. K. 

 Diplopieron quadricorne Nutting, 1900. C; Ca. 

 Halicornaria sinuosa Eraser, 1925. K, NE. 

 Halicornaria speciosa Allman, 1877. K; Ca. 

 Halopteris carinala Allman, 1877. K, T; Ca. 

 Lytocarpus clarkei Nutting, 1900. C, Y; Ca. 

 Lytocarpus grandis (Clarke, 1879). K; Ca. 

 Lytocarpus philippinus (Kirchenpauer, 1872). K, T; 



Ca, EP. 

 Monostaechas quadridens (McCradv, 1858). K, T, Y; 



NW, NE; Ca, EP. 

 Plumularia atlenuata Allman, 1877. K; Ca, EP. 

 Pluntularia clarkei Nutting, 1900. C. 

 Plumularia diaphana (Heller, 1868). K, T, NW; 



Ca, EP. 

 Plumularia filicula Allman, 1877. K; EP. 

 Plumularia floridana Nutting, 1900. K, T, NW; EP. 



Plumularia geminata Allman, 1877. K; Ca. 

 Plumularia inermis Nutting, 1900. T; Ca, EP. 

 Plumularia macrolheca Allman, 1877. C. 

 Plumularia margaretta (Nutting, 1900). K, T; Ca, 



EP. 

 Plumularia megalocephala .\llrnan, 1877. K, C; Ca, 



EP. 

 Plumularia paucinoda Nutting, 1900. C. 

 Plumularia setacea (Ellis, 1755). R, T, NW, NE; 



EP. 

 Plumularia setaceoides Bale, 1882. K, Ca. 

 Plumularia strictocarpa Pictet, 1893. K; Ca. 

 Schizotricha dichotoma Nutting, 1900. K. 

 Schizolricha tenella (Verrill, 1874). NW?; Ca, EP. 

 Thecocarpus bispinosus (Allman, 1877). K. 

 Thecocarpus distans (Allman, 1877). K, T. 



SUMMARY 



A total of 183 species of hydroids, 31 athecate 

 and 152 thecate, are known from the Gulf of 

 Mexico, mostly from the Tortugas and the Florida 

 Keys. Medusae are not considered. The Gulf 

 and the Caribbean have 95 species in common, 

 but 61 Caribbean species are unknown in the Gulf. 

 Seventy Gulf species also occur in the eastern 

 tropical Pacific, including 18 not yet known from 

 the Caribbean. Taxonomic difficulties, as well as 

 inadequate collecting, make hydroid geography an 

 unsatisfactory subject, and it is uncertain how far 

 the apparently common "American" distribution 

 pattern should be taken seriously. Wliat is espe- 

 cially interesting is the occurrence in the Gulf of 

 a significant number of boreal species, some of 

 them seemingly disjunct in the northwestern Gulf. 



LITERATURE CITED 



Allman, G. J. 



1877. Report on the Hydroida collected during the 



exploration of the Gulf Stream by L. F. de Pourtales, 



Assistant United States Coast Survey. Mem. Mus. 



Comp. Zool., Harvard College 5 (2): 1-66, 34 pis. 

 Clarke, S. F. 



1879. Report on the Hydroida collected during the 



exploration of the Gulf Stream and Gulf of Mexico 



by Alexander Agassiz, 1877-78. Bull. Mus. Comp. 



Zool., Harvard College 5 (10): 239-252, 5 pis. 

 Deevey, E. S. 



1950. Hydroids from Louisiana and Texas, with remarks 



on the Pleistocene biogeography of the western Gulf 



of Mexico. Ecology 31: 334-367. 

 Ekman, Sve.\. 



1934. Indo-Westpazifik und Atlanto-Ostpazifik, eine 

 tiergeographische Studie. Zoogeographica 2: 320- 

 374. 



1935. Tiergeographie des Meeres. Leipzig: Akade- 

 mische Verlagsges. xii + 542 pp. 



