IgI0. | S. Kemp: Notes on Decapoda. 181 
The rudimentary exopods, mentioned by Smith, are visible 
only in the case of the female specimen. 
The merus of the second maxillipedes and the ischium and 
merus of the third maxillipedes and first three pairs of peraeopods 
are greatly expanded as in typical Gennadas. 
The third, fourth, fifth and sixth abdominal somites are 
dorsally carinate. The telson is much longer than in other species 
of Gennadas, being only a little shorter than the outer uropod. It 
bears four pairs of lateral spines in its distal third and is sharply 
pointed apically. 
The petasma (fig. 9) consists of a pair of simple leaves, as in 
Benthesicymus. 
The thelycum has been well described by McGilchrist in the 
following words: ‘‘ Between the bases of the fourth pair of legs a 
prominent central papilla stands. Towards this papilla a hairy 
process passes inwards and backwards from the base of each of 
the third pair of legs and from the base of each of the fourth pair 
of legs a tongue-shaped process projects inwards and backwards 
posterior to the papilla. The papilla thus stands in the centre 
between the tips of these four processes.” 
Apart from the type, only the two specimens mentioned above 
are known. Smith’s example, which was found off the east coast 
of the United States, 39° 44’ 30” N., 71° 4’ W., in 1,022 fathoms, 
measures only 74 mm. in length and is thus only about half the 
size of those from the Arabian Sea. 
