l74 PEOF. p. M. BTJlSrCAN's EEVISION OF THE 



Genus Haimea, MicJielin, 1851, Bev. et Mag. de Zool. p. 92. 



Test small, moderately high, tumid and slightly elongate. 

 Apical system nearly central and with four generative pores. 



Ambulacra tumid, imperfectly petaloid, open, passing over the 

 margin to the peristome ; pores oblique. 



Peristome central, pentagonal, and without bourrelets. Peri- 

 proct very small, oval, and placed nearer the peristome than the 

 posterior margin. 



There is only one species to this genus, and the geological 

 position is not known. In Michelin's figure the form is not 

 larger than a nut, it is truncated posteriorly, and swollen and 

 subspherical ; it appears to be a figure of a cast. 



Fossil. Distribution unknown. (Cretaceous ?, France.) 



Grenus Oligoptgus, Be Loriol, 1887, Bee. Zool. Suisse, t. iv. 

 no. 3, p. 394. 



Test moderately large, thick, oval, elongate, depressed, tumid 

 actinally. 



Apical system central or subcentral, compact, small, four 

 perforated basals ; madreporite central and extending to the 

 posterior radials ; radial plates with very small pores. 



Ambulacra slightly differing in length, otherwise similar, 

 almost flush, semi-petaloid, widely open. Poriferous zones broad ; 

 pores equal. 



Peristome central, elliptical, broader than long, in a concavity 

 of the test ; floscelle and jaws wanting. Periproct very small, 

 circular, opening actinally between the peristome and posterior 

 margin. Tubercles small, imperforate, scrobicules sunken. 



Fossil. Tertiary : Plorida, N. America. 



ly. Subfamily FcJiinohrissince. 



Tests depressed, elongate, tumid. Ambulacra subpetaloid. 

 Apical system and peristome excentric, the latter variable in 

 shape, and with single interradial marginal plates ; floscelle absent 

 or rudimentary. Periproct supramarginal. 



Genus Echinobrissus. 



Subgenus Dochmostoma. 

 Oligopodia, 

 Genus Anochanus, 

 Botriopygus, 

 llariona. 



