Laguna @arine Laboratorp 133 
than the outer and somewhat longer, provided with spines and teeth. 
Outer branch is also thickly spined. Both the inner and outer rami 
are very markedly serrate, especially the outer, in which the extrem- 
ity is so sharply divided that it appears bifurcated. 
These specimens found in the sponges appear to be very closely 
related to Cirolana harfordi (Lockington) but the marked difference 
in the number of spines at the extremity of the telson and the evident 
difference in the extremities of the uropod rami, which are more 
rounded and much less emarginate in Cirolana harfordi seems to 
warrant a varietal distinction. The lateral margins of the telson 
of Cirolana harfordi are curved near the base; in the specimens 
obtained from the sponges these margins are straight. These differ- 
ences, with those of size and habitat, allow at least a distinction in 
variety. 
