MUSEUM OF COMPARATIVE ZOOLOGY. 195 
Family ASTACIDZ. 
Nephropsis occidentalis, sp. nov. 
Pubescent. Carapace cylindrical, the branchial regions convex. Rostrum 
densely ciliated on the margins, armed witha pair of lateral teeth near the mid- 
dle; a double row of prominent granulations on the dorsal surface, diverging 
posteriorly and continued backward for some distance on the gastric region. 
A small, blunt papilla in the median line of the gastric area, a pair of acute 
teeth near the anterior margin at the base of the rostrum, and another pair just 
above the insertion of the second pair of antennz; a small papilla in the 
median line on the intestinal region. Abdominal pleure rather longer-pointed 
than in N. stewarti, but not so much so as in N. agassizw and N. atlantica; 
their anterior borders are finely denticulated, but are destitute of spinous pro- 
cesses. Telson armed with a sharp spine in the median dorsal line, near the 
proximal end. 
Length, 119 mm.; carapace, 51 mm.; rostrum, 14 mm. ; second antenna, 
225 mm. 
Station 3418. 660 fathoms. 23 males, 32 females. 
| yomeee C7600 oF 2 males. 
Family ERYONTIDZ. 
Willemoesia inornata, sp. nov. 
Similar to W. leptodactyla, but readily distinguished from it by the small 
number of spines on the margin and dorsal ridges of the carapace. The 
armature may be formulated thus : — 
Marginal . . . ... . . 5to8—2to8—O0to6 
Median ridge ©. . 2.) . 5 Ltob— 0 
The marginal spines which lie behind the cervical groove, if found at all, are 
but rudimentary, while there are no spines on the submarginal carina or along 
the lateral boundaries of the cardiac area, where they are present in W. lepto- 
dactyla. The third maxilliped bears only a slender epipod ; the membrane 
that connects this limb with the body carries a small, but perfectly formed 
gill (arthrobranchia). According to Spence Bate, this gill is absent in 
W. leptodactyla. 
Station 3374. 1823 fathoms. 8 males, 6 females. 
a 0 (6 -ele O 1 male, 1 female ovig. 
iy) 33825 e79o ke 2 males, 4 females (1 ovig.). 
« 3399. 1740 se 2 males, 1 female. 
3400. 1322 : 1 female. 
VOL. XXIV.—NO. 7. 4 
