BULLETIN 59. UMITED STATES NATIONAL MUSEUM. 2U7 



The caliccs arc deep, from 1 iiini. in cliuint'lfr in the depressions to '2 mm. on the 

 eleviitions, usually 1.5 mm. or sligiitly muic. Separated by tall, straight walls. The 

 mural denticles are rather coarse, and inoderately rejriilar in size. 



The upper portions of the septal uiurifins are usually narrow, forming ridges 

 along the sides of the walls, or sometimes obsolete. Between the i)alar ends of the 

 septa and the wall there is one trabeoula. Frequently there is no distinct septal gran- 

 ule; one, however, is sometimes present as a tliickeiied tooth, cletacheil from tin; wall. 

 As a rule a few denticles, processes from the tiubecuhc, occur on the septsil margins. 

 A peripheral ring of synapticuia is usually indicated, but it is verj^ rarely even 

 approximately complete. The septal faces are almost without granulations and pre- 

 sent a strikingly smooth appearance. Intcrseptal loculi open. The septal arrange- 

 ment is, dorsal directive, four lateral pairs, fused in jjairs by their inner ends, and a 

 directive triplet, its members not fused to one anotlier. The pali are poorly devel- 

 oped, the formula is rarely complete, altiiough the septal arrangement is in accord 

 with its being complete. They are l)etter developed on the ends of the pairs, and 

 are often suppressed on the dorsal directive and on one or more members of the 

 triplet. The inner ends of the septa joined by a ring of synapticuia. 



The columella is a narrow, thin lamella, joined to the inner ends of the septa. 

 The columella tangle, open and loose. 



The specimen from WaiUilci siiows no ditl'erences of importance from the second 

 one from Pukoo. 



Localities. — Pukoo, Molokai, 2 specimens received from Dr. W. T. Brigham; 

 Waikiki, Oahu. 1 specimen, collected l)y Dr. J. K. Duerdcn. 



Cotyj^es.—CAi. Xos. 20921, 2092-1, U.S.N.IM. 



Professor Studer in 1901 described from Laj'san two species of Poritci, having 

 the massive glomerate mode of growth. Mis desci-iptions, rendered somewhat liber- 

 ally into English, follow. I suspect that his J', qihldil is a synonym of J\ hilhitn. 

 The presence of only six pali in the former species and its denser texture are the 

 characters that 1 can gather from his description by which the two are separated. 

 The second one of his species, according to his description, possesses several char- 

 acters that indicate distinctness. It is unfortunate that Professor Studer has described 

 for his species neither the septal arrangement nor the relations of the pali to the 

 septa, and has not given much-needed detjiils concerning several other skeletal struc- 

 tures. 



7. PORITES QUELCHI Studer. 

 Plate LXX XVI. 

 1901. Pontes quelchi Stitder, Zool. .Tahrb., Syst., XL, p. 422, pi. .w.xi, tig. 14. 

 Bixcrlption. — According to Professor Studer. this species has the following 

 peculiarities: 



The colony is massive, 156 mui. high and 146 mm. in diameter. The upper surface is uneven, 

 divided into hillocks and lobes whidi are .somi-times ronnded, sometimes more el<ini;ateil and com- 

 pressed. Those of the la.st form have dearly orii;iiiateii from the fusion of several single hillocks. The 

 whole ma.ss, which is heavy and of a dense texture, consists of layers of coral substance laid <io\vn one 

 above another. The outermost living layer is .'? mm. thick, and is separate<l from those lying lielow by 

 epitheca. 



