REPORT ON THE ANOMURA. 143 



without considerable hesitation that I have ventured to separate the two ; it is dis- 

 tinguished by its smaller size, the broader and flatter carapace, the non-diverging supra- 

 orbital spines, the presence of spiuules on only the second abdominal segment, and the 

 shallow-water habitat. 



Habitat. — St. Paul's Rocks ; depth, 10 to 60 fathoms. A female with ova and a 

 young male. 



Munida gracilis, Henderson (PI. XIV. fig. 4). 



Munida gracilis, Henderson, Ann. and Mag. Nat. Hist., ser. 5, vol. xvL p. 412, 1885. 



Characters. — The rostrum is about two-thirds the total length of the carapace, and 

 more than twice the length of the supraorbital spines ; all three are distinctly upturned, 

 but especially the rostrum, which reaches a considerably higher level than the carapace 

 itself. The transverse striae on the carapace are granulated, and comparatively few in 

 number, the fringing hairs being poorly developed ; the gastric area is somewhat swollen, 

 and is armed in front with a transverse row of spinules from eight to ten in number, two 

 of which, placed behind the supraorbitals, greatly exceed the others in size, a second, 

 but very much smaller, pair of gastric spines is placed immediately behind the first pair, 

 and there is a single spinule on each side towards the lateral boundary of the area ; the 

 cardiac area is unarmed, and indistinctly circumscribed ; a prominent spinule is jjlaced 

 on each branchial region behind the cervical groove, and in close proximity to the outer 

 border of the cardiac area ; a minute spinule may also exist on the anterior branchial 

 region. The lateral border of the carapace bears seven spines, only two of which, 

 situated in front of the cervical groove, attain any great size ; the posterior margin is 

 almost straight and distinctly elevated, but unarmed. 



The chelipedes are subcylindrical and remarkably long and slender; the upper 

 surface of the merus, carpus, and propodus is armed with prominent spinules, which are 

 most strongly developed on the first of these joints. The chela is narrower than, and 

 slightly more than twice the length of, the carpus ; the fingers are slender and almost 

 straight, with their length considerably less than that of the palm, and the opposed 

 edges finely toothed ; the dactj'lus is bispinose at the apex, and the immobile finger 

 trispinose. The ambulatory limbs are slender, and provided with a pair of prominent 

 spinules at the distal end of the meri and carpi, both margins of the meri also are 

 armed with spinules, and the anterior is in addition pubescent ; the dactyli are about 

 two-thirds the length of the propodi, and moderately curved. 



The eyes are of moderate size and slightly flattened, while the cornese in both the 

 specimens examined are of a light brown colour. The antenna! spine scarcely reaches 

 the middle of the second peduncular joint, and the latter is provided with a pair of pro- 

 minent spines at its distal end. The ischium and merus of the external maxillipedes 



