54 RECENT MADRETORAKIA OK THE HAWAIIAN INLANDS AND LAYSAN. 



calice. Tho inside of tiie \v:ill iuid the .sppta are usiuilly w liito. hut in speciinen.s Nos. 

 (5 und 9 there is coiisidenihlc jxirplish i-ed on tlie wall and the pciipheral portious of 



liic septa. 



There are two speeiiuens from station No. ;-5S5C> not included in the precedinjr 

 table. One of these is notewoithy in havinjf an angle of divergence of the hxteral 

 edges of 134'^; the sides are asyininetrical; on one side 70^ is the angle with the ver- 

 tical axis, on the other 58 , practically combining in the same specimen the angles of 

 jKirmihutiii typical with those of vm: jxn'//>tin>/u'nym. 



Three specimens that connect pavonimim typical with var. d/sflnctinn on one 

 hand and with var. parimvoninnin on the other are considered in the following 

 table. 



Table 11. 



Specimens Nos. 22 and 23 difier so little from those of Table I that they could 

 with propriety l)e placed with paroiiinum typical. The lateral edges of No. 22 are 

 slightly crested, and it is precisely intermediate between typical pavonimim and 

 var. dldmctmn. Specimen No. 23 is decidedly compressed. The lateral edges, how- 

 ever, are not crested or sharj) keeled, but obtusely rounded. It is intermediate between 

 the typical form of the species and specimen No. 2-1, which connects with x&v. j)aripa- 

 voniniiiK, represented by Table V, p. 60. The basal angle of the lateral edges is 

 becoming smaller, and specimen No. 24 has the arch of the upper margin of the calice 

 more produced than in typical pavonimim, presenting the essential characters of var. 

 pari pai-oninu III. Other variations and intergradatiou in the character of the septal 

 margins are shown. In .specimen No. 2:5 the septal arch is becoming less pronounced 

 than in the specimens included in Table I, the upper and outer narrow portions of 

 the margins of the principal septa forming a wider zone. In specimen No. 24 the 

 septal arch is still more supjjressed, the septa tending to slope in an almost straight 

 line from the lower limit of the zone of narrow septal ends to the boundary of the 

 axial fossa. The arch diminishes from the ends of the shorter toward the plane of 

 the larger axis of the calice. 



Liifdlifii.s. — Those from whi<-li previously reported: Sandwich Islands (Lesson, 

 Dana); Singapore and China (Milne Edwards and Haime): Cape of Good Hope, 50 

 to 100 fathoms (Gardiner). 



