Spermatophores in Panulirus and Paribacus. 181 
gesting the edges along the gape of the beak of a bird. "This claw 
is evidently quite unlike the usual claws of the anterior legs of 
crustacea and may well have some special use, and being found 
only in the female is either used in cleaning the body for the eggs, 
or in liberating the sperm or in both these necessary sexual acts. 
Fig. A. 
The peculiar specialization of this claw is more evident upon 
closer serutiny which shows even with the naked eye a dense brush 
of setae all along the inside edge of each rim of both upper and 
lower parts of the claw. These setae are set close together to form 
a dense hard brush and form about ten irregular rows from side 
to side. The longest setae are in the innermost row and the shor- 
test in the central row so that the surface of the brush is not flat 
but hollowed out. The outermost two rows of setae are quite diffe- 
rent from the rest, being thick blunt clubs while the rest are 
slender spines with sharp tips bent to one side Each seta is 
hollow and in the outer spatulate or club shaped ones the central 
canal bends to one side and seems to open near the tip. 
A cross section of the claw, Fig. B, shows the thick shell 
hollowed on the face opposite the opposing member, and the edges 
of these hollowed faces projecting as the above horny rims like 
