262 PROCEEDING.^ OF THE NATIONAL MUSEUM. vol.xxxii. 



Genus HERPETOLITHA Eschscholtz. 

 HERPETOLITHA FOLIOSA (Ehrenberg). 



1879. Ilerpeto/itlin foliom KLVti'/ANGER, Koralltli. Ruth. Meer., Pt. 3, p. 68, pi. viii, 

 figH. 4, 5. 



Six specimens, four of which show distinct detachment scars. I 

 have already called attention to this phenomenon in ni}'^ Critical Re- 

 view of the Literature on the Simple Genera of the Madreporaria 

 Fungida^, with a Tentative Classification/' 



Genus ASTREOPORA de Blainville. 



ASTREOPORA EHRENBERGII Bernard. 



1896. Astrxopora ehrenbergii Bernard, The Genus Astrppopora, Brit. -Mus. Cat. 

 Madrepor., II, p. 92, pi. xxxiii, fig. 15. 



One specimen. 



Genus GONIOPORA Quoy and Gaimard. 



GONIOPORA SOMALIENSIS, new species. 



Plate XXV; plate XXVII, fig. 'l. 



Corallum forming an imdulated lamina attached by a portion of one 

 side, the free edge broadly lobate. Extreme width, 89 mm.; width in 

 sinus between lobes, 35 mm. ; width along lobe, 62 mm. ; greatest thick- 

 ness, 10 mm. The margin is acute or obtusel}^ rounded. The upper 

 surface covered with calices; the lower, invested to the margin by a 

 minutely, concentrically striate epitheca. 



Calices of moderate size, from 2.5 to 4.5 mm. in diameter, usually 

 about 3.5 mm.; polygonal, very shallow or superficial. Walls thin, 

 poorly developed, reinforced by peripherally disposed synapticula. 



Septal formula complete, that is, twenty -four in number, with typi- 

 cal gonioporid arrangement. Pali present before the primaries and 

 secondaries, rather irregular in development; moderately prominent, 

 consisting of separate granules, or those before a triplet and the pri- 

 mary joining its inner end, fused laterally. Usually there are two 

 rough dentations between a palus and the mural denticle. Interseptal 

 loculi narrow but open. The columella tangle extends outward 

 be3^ond the pali; it is large, often with a tendency to compactness. 



Type. — One specimen, one piece of which is in the Museum d'Histoire 

 Naturelle, Paris, the other in the United States National Museum. 



Bemurl's. — Bernard, in his work on Goniopora., describes three forms 

 that are similar to the one under discussion, namely: G. Barrier Reef 

 (12) 1; G. North-West Au.stralia (6) 2; G. North- We.st Australia (6) 3. 

 The last one seems the nearest; it differs b}- having a closely encru.st- 



aProc. U. S. Nat. Mus., XXVIII, 1905, p. 380, footnote. 



