242 RANKIN. 



than the peduncle of the inner antennae, compressed laterally 

 and prolonged as a ridge nearly to the sharply marked cervical 

 furrow, above with four teeth, below teeth wanting. Carpus of 

 third pair of pereiopods quadrangular as in 5. hispidiis, but the 

 chelae compressed, with smooth sides and not so long ; chelae, 

 including the dactyl, twice as long as broad ; the upper margin 

 sharper than the under and smooth, the under serrated. The 

 dactyl half as long as the palma ; the back of the dactyl keeled, 

 serrated. Length from tip of rostrum to tip of telson 12 mm. 

 Length of third pereiopod 13 mm. Breadth of chela 3 mm. 

 The fourth pereiopod shorter than third." 



I note the following peculiarities in my specimens : Dorsal 

 surface of rostrinn zvith six teeth ; the fourth and sixth have each 

 a minute subsidiary tooth. * Ventral surface with a single, not 

 very prominent tooth. Both margins of the chelae of the third 

 pereiopods very finely serrated, a rather prominent keel on the 

 upper margin. The third pereiopod of the right and left sides 

 similar. Telson spiny. The large specimen ( 9 ) is 15 mm. 

 long, the $ slightly smaller. Length of chelae in 9,6 mm., 

 breadth, 2.5 mm. 



Not having the opportunity of comparing the Bahama speci- 

 mens with Von Martens' type I prefer to consider these slight 

 variations as possibly due to imperfect description, and to place 

 my specimens, provisionally, at least, with Von Martens' species. 



wS. seniilcevis differs from ^. hispidns mainly in the teeth of 

 rostrum, the shorter rostrum, the proportionately shorter and 

 thicker hand, the less spiny carapace of cephalo-thorax and the 

 smooth abdomen. 



52. Stenopus scutellatus n. sp. (PI. xxix, Fig. 3). 



[a) I (?) $ . Under coral, near low water. Silver Cay, N. P. 



Total length from tip of rostrum to tip of thorax 18 mm. 

 Length of rostrum 3 mm., of cephalo-thorax 7 mm. 



Rostrum has a single row often spines on median dorsal line; 

 back of the tenth a double row of three spines extend to 

 the cervical furrow. On median ventral line of rostrum are six 

 spines ; no lateral spines on rostrum. Rostrum longer than in 



