BULLETIN a'J, UNITED STATES NATIONAL MUSEUM. 

 Table I. 



53 



Specimen 

 number. 



Station 

 number. 



-Average ... 



Height, 

 measured 

 along face. 



22. 5 



22 



30 



30. 5 



32 



17 



20 



37.5 



40 



41 



40 



23. 5 



24.5 



26.5 



30.5 



29.5 



31.5 



24 



34 



53 



29.3 



Angle of 

 lateral 

 edges. 



174 

 180 

 166 

 174 

 190 

 155 

 188 

 180=t 

 170 

 168 

 167 

 168 

 165 

 175 

 180 

 184 

 180 

 180 

 125 

 68 



Angle of 

 faces. 



174 



35 



39 



41 



39 



42 



39 



40 



46± 



47± 



30 



44 



40 



42 



41 



41 



43 



53 



34 



42 



37 



40.3 



diameter 

 of calice. 



mm. 



29 



27 



42 



40 



40 



26 



25 



48 



70 



64.5 



69 



26 



33.5 



34.5 



39 



36 



39. 5 



28 



37 



56 



diameter 

 of calice. 



39.8 



mm. 



13.5 



14.5 



22.5 



20.5 



23. 5 



13. 5 



14 



32 



33 



20.5 



24.5 



14 



17.5 



18 



20 



22.5 



26.5 



14 



25 



35 



Shorter 



diameter 

 above 

 longer. 



20.2 



mm. 



19 



18.5 



25 



26 



29 



13 



13.5 



34 



39 



30 



31.5 



15 



19 



21 



25 



27.5 



27.5 



16.5 



w„n,K<>.. Number 

 otsLpta. paisep,,,. 



6.5 



191 

 197 

 191 

 193 

 206 

 111 

 150 

 260 

 326 

 240 

 239 

 185 

 191 

 192 

 192 

 196 

 207 

 182 

 135 

 122 



45 



48 

 48 

 48 

 48 

 24 

 24 

 48 

 48 

 48 

 50 

 43 

 48 

 48 

 48 

 48 

 48 

 33 

 19 

 27 



Faces: 

 cv= con- 

 cave: 

 cx=con- 



vex; 

 pl=planc. 



23.8 



203 



44 



pi. 

 pi. 



pi. cv. 

 cv. 

 cv. 



pi. cv. 

 pi. cv. 

 cv. 



pi. cv. 

 cv. ex. 

 cv. ex. 

 pi. 

 pi. 



pi. IV. 



cv. 

 cv. 

 cv. 



pi. 



cv. 

 cv. 



"Specimens Nos. s, 11, and 20. figured. 



f* Specimens Xos. 19 and 20 have been broken and subsequently repaired: both are abnormal and are omitted in 

 calculating the averages. 



Several characters not hrouijht out in the preccdini>- tal)lp deserve notice. The 

 faces in none of the .specimcn.s are .strongly convex; they arc only very gently so. The 

 concavity of one, or even of both faces, maj' be pronounced. Specimens 9, 10, and 

 11 have one face decidedly concave; spociiiien No. 8 has both faces concave. The 

 lateral edges are acute near the pedicel in all the perfect specimens, and in the smaller 

 ones are usually acute throughout their length, but in large specimens — as, for 

 instance, Nos. 8, !), 10, and 1 1 — th(> iingh^s at (he ends of tlu> calices are rounded. The 

 principal septa are arched above and fall inwardly steeply to the bottom of the calice. 

 The outer portion of the septal arch may reach the upper edge of the wall, as in 

 specimen No. 8, or the uppermost jieriplieral portion may be in large part cut away, 

 forming a zone of narrow septal ends just below the upper edge of the wall. The 

 excavation of the septal margins at the wall is oiu; of tiie characters given by Moseley 

 for his J^. aimtrale. Specimens Nos. 8 and i> have both kinds of .septa in the same 



