410 riKJCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvni. 



1. Genus TURBINOSERIS Duncan. 



187(1. TiirliiiinKcrinDv^i'AS, rahi'oiitograph. Soc, Monog. Brit. Foss. Corals, Slip., 

 I't. 2, No. 2, p. 42. 



( >r'i<i'n)(d (/eiierie (luKjiKmi^. — "The coralluin is simple, more or less 

 tuil)iiuite, or constricted midway ]>etween the base and calico. The 

 base is either bi-ojid and adherent or small and free. 



"There is no epitheca. and the costal are distinct. 



'"There is no columella, and the septa unite literally [-s/c] and are 

 very numerous.'' 



Ty)>e species. — TurhinoMeris (lefnniientcJi Duncan, Pah\?ontog'raph. 

 Soc, Monog. Brit. Foss. corals, Sup., Ft. 2, No. 2, p. 43, pi. xv, tigs. 

 13-lS. 



(jfeohx/lc Jiorhon ami loail'dy. — Athertield, England, in the Lower 

 Greensand. 



RemarliH. — The following additional characters apparently can })e 

 deduced from Duncan's description and figures of T. defromenteU. 

 He sa3^s "the syuapticultB are well developed, and the costfe are well 

 developed, and often not continuous with the septal ends." The septa 

 are not positively stated to be imperforate, but figures 15 and 18 so 

 represent them. No discussion of the wall is given, but })oth hgures 

 13 and 14 represent it as of perforate or synapticulate composition. 

 Figure 18 illustrates what Duncan says is "the unusual appearance of 

 septa ending in intercostal spaces, magnified.'' Figure 16, natural size 

 of a calice, shows an apparently imperforate wall, though not of uni- 

 form thickness, and the septa in most instances correspond in position 

 with the cost}©. Although Duncan says there is no columella, one 

 would judge from his figure that a poorly developed, false one is 

 present. A comparison is made with Trovhoserm in the following 

 words: "The necessity for forming a new genus for this species is 

 obvious. It is the neighl)or of Trochoseris in the subfamily of the 

 LopJhomr 1)1(1'. This last genus has a columella and the new has none." 



There is quite a large literature on Tiirhlnoseris^ but no one has as 

 yet published an accoiuit of the structure of the type species. The 

 following is a review of the literature: 



Duncan, in his On the Older Tertiary Formations of the West 

 Indies," republishes his original description, adds a note to the effect 

 that it is separated from Trochoseris by the absence of a columella, 

 and describes seven new species from the Tertiary of St. Bartholomew, 



In his Sind fossil Corals and Alcyonaria,^ he descri)>es four more 

 species that he places in Turhino-serix^ but gives no additional informa- 

 tion on the characters of the genus, 



"Quart. .Tour. Geol. Soc. London, XXIX, 1873, pp. 558-561. 

 ''Palfcontol. Indica, Ser. XIV, I, 1880, Pt. 2, pp. 49-51, 



