466 
Aug. F. Foerste 
Another specimen from the Faber Collection, 995 IB (plate V, 
Fig. 1, B, D) presents all of the plates, and has the parallel line 
ornamentation of the type specimen. This ornamentation has 
been omitted in the following diagram. 
All of the plates belonging to the first three rows are distinctly 
outlined, excepting plates 13 and 14, and, of these, plate 13has been 
pushed up until it belongs practically to the fourth row, as already 
noted in the description of the genus. The right hand margin of 
plate 13 is concealed by the ambulacrum which traverses the left 
three-fourths of plate 19 and reaches a point on plate 14 opposite 
the middle of the anal area. The last two left hand brachioles of 
this ambulacrum are preserved. They consist of two series of alter- 
nating plates, about five or six in each series. Judging from other 
specimens, the brachioles near the proximal end of the ambulacra 
.o o 
B CD 
Fig. 7. Diagram of Lepadocyslis moorei. The natural size of the specimen is 
indicated by an outline at the right of the diagram. A , Diagram of the ray system ; 
the rays follow the sutures between plates 20-24, and terminate usually on plates 
15-19. B, Diagram of anal pyramid and of part of the surrounding circlet of 
plates. C, The same plates, in natural position. D, The anal pyramid, viewed from 
the side. Specimen No. 9961B, Faber Collection, Chicago University. 
probably were longer. Owing to the ambulacrum just mentioned, 
the suture between plates 13 and 14 is concealed. On plate 15, 
the ambulacrum reached the middle of the plate, at the junction 
of the two adjacent angles of the pectinirhombs. This is the 
anterior ambulacrum, and is always the shortest. On plate 16, 
the ambulacrum crosses only slightly to the right of the middle of 
the plate and passes a short distance beyond the suture between 
plates 16 and 17. On plate 17, the ambulacrum crosses the entire 
length of the plate, grazing the upper right hand margin of the 
pectinirhomb, and at least one of the ambulacral plates reached 
