REPORT ON THE CRUSTACEA MACRURA. 



809 



their long and slender character, are particularly liable to be broken. The consequence is 

 that there is only one specimen, a male, out of the three taken at Station 300, in which 

 any of the pereiopoda are preserved ; this specimen is smaller than the one from which 

 the measurements are taken. 



The rostrum in the smaller specimen is only two-thirds the length of the carapace, 

 and is 20 mm. long, while the carapace measures 28 mm. The ophthalmus is more 

 globular than in Nematocarcinus longirostris. The peduncle of the first pair of 

 antennas is about half the length of the rostrum, and the scaphocerite reaches to a point 

 but little short of the apex of the rostrum, while in the larger specimen it falls short by 

 about one-third of its length. The first pair of pereiopoda has the chela long and the 

 dactylos slender and as long as the palm. The second pair of pereiopoda has the chela 

 short and the dactylos half the length of the palm, and reaching a little beyond the 

 extremity of the scaphocerite, while that of the first pair falls short of the same. 

 The only other pereiopod that has been preserved is the right penultimate, in which the 

 carpos is seen to be a little longer than the meros and more slender ; the propodos is 

 also slender and comparatively long, and the dactylos is long, slender, and curved, and 

 is also embedded in a fasciculus of straight and long hairs. 



The rest of the animal differs little from other allied species. 



Nematocarcinus alius, n. sp. (PI. CXXXII. fig. 4). 



Rostrum long and slender, nearly of the same length as the carapace, armed on the 

 upper surface with ten small spinules close together on the frontal crest, posterior to the 

 orbits, and with five or more teeth on the rostrum proper, and on the under surface with 

 two or more small ones. 



Telson shorter than the outer branch of the rhipidura. 



Habitat— Station 198, October 20, 1874 ; lat. 2° 55' N., long. 124° 53' E.; south of 

 the Philippine Islands ; depth, 2150 fathoms; bottom, blue mud ; bottom temperature, 

 38°'9. One specimen, male. Trawled. 



Only one specimen of this species was procured, from which all the appendages are 

 wanting, and the rostrum is broken near the apex. The number of teeth is not nearly 

 so great as on the rostrum of Nematocarcinus longirostris or even of Nematocarcinus 



(ZOOL. CHALL. EXP. PART LII. 1887.) Fff 102 



