PSEUDOLOVENIA HIRSUTA. 259 



are all so well shown in the photograph (Plate 160, fig. 10), that a description is 

 not needed. The internal fasciole does not show well; it encloses an area 

 about 20 mm. long by 8 mm. wide, with a rounded posterior end; at this end 

 the fasciole is very broad. In side view (PI. 160, fig. 8) the somewhat swollen 

 posterior end of the test and the projecting sternum are well seen. The ventral 

 surface is very largely bare, as in Lovenia; the small tuberculated area of the 

 sternum, the position and form of the peristome, and the large primary tubercles 

 of the subanal plastron and of the lateral interambulacra all come out well 

 in the figures (PI. 160, figs. 9, 12). The posterior end of the test is nearly verti- 

 cal, the periproctal region being scarcely at all depressed, though the subanal 

 plastron projects a trifle beyond the periproct; the latter is about 9 mm. wide 

 by 7 high. The subanal fasciole is wide and very distinct. The enclosed plas- 

 tron is only 6 mm. high at the middle, but it is 25 mm. wide and at each side it is 

 10 mm. high; the lateral portions include 5 ambulacral plates (the 6th-10th) 

 but there are only 3 large tube-feet; the 10th plate just sends a projecting corner 

 within the fasciole but with no accompanying tube-foot. In all the other speci- 

 mens examined, there are 4 ambulacral plates on each side within the fasciole, 

 and 3 tube-feet, the 10th plate not entering. On each side of the plastron is a 

 group of about 15 (holotype) large primary tubercles. The character of the 

 sternum is well shown in fig. 9, but the form of the labrum is not clear. Indeed 

 the labrum shows considerable diversity in form and length. As a rule it reaches 

 back far enough to come in contact with the third ambulacral plate on each side, 

 but sometimes it fails entirely of reaching them. In a specimen 28 mm. long, 

 it is 6 mm. long, 1.5 mm. wide, where widest, and tapers to a slender tip, which 

 is broadly in contact with the third ambulacral plate on each side, while in 

 another specimen, of about the same size, it is 5 mm. long, nearly 2 mm. wide 

 and does not reach the third ambulacral plate on either side. The color of the 

 smaller specimens is whitish or pale brown when dry; larger specimens are 

 more gray or brown; the spines when dry are nearly or quite white. The sub- 

 anal fasciole is dark brown, conspicuously so in alcoholic material. 



The general character of the spines is clearly shown in the photographs 

 (PI. 160, figs. 11, 12). The primaries on the dorsal side are 30-35 mm. long 

 and are very similar to those of Lovenia; under the lens the distal portion is 

 finely thorny. Pedicellariae are abundant and characteristic. No globiferous 

 of any sort were found, but multidentate occur about the peristome and along 

 the sides of the ambulacra ventrally while ophicephalous are common, and in 

 small specimens are sometimes exceedingly abundant, on the ventral ambulacra 



