ZOOLOGY OF FERNANDO NORONIIA. 
517 
middle line at a very obtuse angle. Carapace nearly smooth 
frontal spines considerably shorter than the eye-stalks, slightly 
incurved at the apices, armed above at the base with a single 
spine ; one spine situated near the ocular margin of the carapace, 
one in the anterior third of the supero-lateral margin, and a 
third beneath the eye-stalk near the outer portion of the basal 
antennal segment. 
Antennal peduncle about two thirds the length of the 
carapace ; basal segment armed externally with a single spine on 
its anterior margin; second segment armed above with five spines, 
two forming a longitudinal series externally, three forming an 
oblique series internally ; third segment armed above with ten 
short spines. Below, the three segments are smooth. 
Antennular plate nearly horizontal, with rounded antero- 
external angles not armed with spines ; the peduncle shorter than 
peduncle of antennae ; segments of peduncle not spined. 
Epistoma with a straight unspined anterior margin. 
The first and fifth pairs of limbs simple, unspined. (Second, 
third, and fourth pairs absent.) 
Postero-external angles of the sternum prolonged into a sharp, 
long spine. 
Abdominal tergites smooth, punctured, not marked with a 
transverse sulcus ; interiorly and laterally prolonged into a spine. 
The posterior margin of the last dorsal plate furnished with two 
long, sharp spines. 
Proximal portion of telson furnished in the middle of its 
upper surface with two spiues and with its posterior margin 
armed on each side with four spiues. 
Total length from anterior margin of carapace to posterior 
margin of telson 27 millim. Length of upper surface of carapace 
11 millim. 
One specimen. 
Judging from its size, the specimen from which the above 
description has been taken is certainly immature. It, never- 
theless, presents the characters of a true Panulirus, and differs 
from all the specimens of that genus that I have examined in 
the absence of spines from the basal plate of the antennulae. 
Dredged in Water Bay. About 10 fathoms depth. 
