60 RKCKNT MADRKPdHAKTA OF THE HAWAIIAN ISLANDS AND I.AYSAN. 



least, siiiallor than the iiieiiihers of the first three eyelos. The size of the fourth 

 cycle has been shown to he \aria})le, these specimens from Hawaii show varia- 

 tion, and ("tn therefore he disre<rarded. Alcock states that the inner edges of 

 the septa of pariparonitnnn are straioht, not undulated. In the Hawaiian speci- 

 mens the inner edjres of the septa of this \ariety are not so strongly undulated as in 

 the other varieties of jKinminiuii, and in some cases the septa are so little undulated 

 that they might be called straight. The \^^\•>v\• portions of the principal septa in 

 Alcock"s figures of jxiripiinnuu'uii \\y(- ^\Kh'V than in the Hawaiian specimens, but 

 this is a variable character. At first I thought of erecting a new variety for the 

 Alhafi'dKs specimens, sepai-ating them fiom jKirijidnuiinKin because their principal 

 septa are more numei-ous and narrower near the calicular margins, but l)oth characters 

 are too variable to furnish a valid basis for even varietal separation. 



The following table is based upon 50 specimens, all of the best preserved and 

 most ])erfect of those obtained. As remarks have already been made on the varia- 

 tion and some ('haracters not ex])r(>ssed in the table, what is to be said along this 

 line may appropriately be comi)leted here. The bases of the specimens are often 

 more compressed than tlie up])er portions. Below the plane of the longer axis of the 

 calice tlie faces of the coralhun are normally gently convex; above that level they 

 are almost flat until near the iip))er edge t)f the wall, where frequently there is a 

 gentle bending outwaid, making the upper portions of the faces slight]}' concave. 

 Those specimens that have their upper edges flaring outward in this way are marked 

 "H" in the following table. The lateral edges are subacute, except at the ends of 

 the calice. where they are rounded; moderately developed crests are sometimes 

 present. Tlu' angle of (ii\ergence is not always the same throughout the length of 

 the latei'al edges. When two angles are given in the table, the first one is taken 



nearer the center of the base. 



Table V. 



Specimen 

 number. 



28. 

 29. 

 30. 

 31. 

 32. 

 33. 

 34. 

 35. 

 36. 

 37. 

 38. 

 39. 

 40. 

 41. 



station 

 number. 



Height, 



measiiretl 



along side; 



p. b. means 



pedicel 



broken. 



Angle of 

 lateral 

 edges. 



Angle of 

 faces. 



4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 

 4080 



26 



26.5 



33 



36 



36 



36 



38. 5 



.33 p.b. 



39 



37 



38.6 



.36 



38. 5 



92 



90 

 104 

 <a. 1 L'O 

 105 

 cii. 100 

 114 

 106 

 109 

 112 

 120 



95 

 100 



98 



41 

 46 

 47 

 40 

 45 

 47 

 49 

 38 

 51 

 47 

 45 

 45 

 45 

 45 



Number 

 of septa. 



Number 

 of prin- 

 cipal 

 sepia. 



104 

 114 

 118 

 148 

 164 

 190 

 192 

 178 

 164 

 ISS 

 176 

 160 

 178 

 164 



24 

 24 

 28 

 28 

 42 

 48 

 39 

 38 

 40 

 46 

 39 

 36 

 44 

 38 



Faces: 

 ex. = con- 

 vex; fl.= 

 somewhat 

 flaring su- 

 periorly. 



ex. 



ex. 



ex. 



ex. 



ex. 



fl. 



ex. 



fl. 



fl. 



fl. 



fl. 



fl. 



ex. 



ex. 



