BULLETIN OF THE 
Paleopneustes hystrix A. Ac. n. sp. 
This species is more flattened than P. cristatus; the ambulacral pores are more 
distant, extending In nearly vertical rows, slightly and uniformly spreading towards 
the ambitus. The primary tubercles of the abactinal surface are not numerous ; 
they earry large, comparatively stout, slightly eurved sharp primary radioles, 
which, at first sight, give this Spatangoid the appearance of one of the regular 
Sea-urchins. The color of the test and of the spines is greenish purple, or a light 
Indian red. The spines of the actinal surface are finer, spathiform, and closely 
packed, specially closely clustered round the anal system. There is no trace of a 
marginal fasciole. 
Station 144. 91 fathoms. On Saba Bank. 
i 148. 208 ÉS Off St. Kitts. 
SB ES 120 5 * Montserrat. 
Ha LOO 150 i * Guadeloupe. 
Linopneustes longispinus A. Ac. 
Eupatagus longispinus A. Aa. Bull. M. C. Z., V. no. 9. 
In the Preliminary Report of the Echini of the “Blake” Expedition for 1877- 
78, I noticed under the name of Lupatagus longispinus fragments of a large 
Spatangoid too imperfectly preserved for accurate generic determination. A 
number of specimens of this fine species were collected, and I am now able to 
say that it belongs to the subgenus Linopneustes (Paleopneustes), and is most 
closely allied to Linopneustes Murrayi. 
It can at once be distinguished from it by the great flatness of the test, the 
nearly closed lateral petaloid ambulacra, about half-way from the apical system, and 
the simple rows of pores spreading far apart at the ambitus. The primary tuber- 
cles are distant; on the abactinal surface they carry long, stout, curved primary 
radioles of a whitish silvery lustre, with yellowish tint. The color of the test is 
pinkish or flesh-color. The subanal fasciole is small, transversely elliptical; the 
marginal fasciole is of a dark color, extends a very short distance above the ambi- 
tus along the whole outline of the test, and crosses the posterior extremity above 
the anal system. | 
The spines of the actinal surface are much finer and shorter than those of the 
abactinal side. The ambulacral areas are broad, bare; the actinal plastron is 
small. Large specimens measure nearly four inches in length. 
Station 127. 38 fathoms. Off Santa Cruz. 
e ds .948 i: ds $ 
id 147. 250 " GS AT KUS 
AO 208 u ys T 
w nc pags 60-150 “ Lis E 
£x T0) 271 "T Between St. Kitts and Nevis. 
on 154, 298 de Off Montserrat. 
5, O74, 209 fe * Barbados. 
300. $.» e 
