REPORT ON THE CRUSTACEA MACRURA. G71 



The first pair of antennae (fig. 4b) has the peduncle subequal in length to the rostrum, 

 the first joint corresponds with the length of the ophthalmopod and supports a short and 

 round-pointed stylocerite ; the second joint is short, and the third still shorter and 

 cylindrical ; it terminates in two flagella subequally long and but little longer than the 

 peduncle, the outer being robust and the inner very slender. 



The second pair of antennae carries a scaphocerite that reaches beyond the extremity 

 of the rostrum and a flagellum that is as long as the animal. 



The oral appendages have not been examined. 



The second pair of gnathopoda is tolerably robust and reaches as far as the extremity 

 of the rostrum. 



The first pair of pereiopoda (fig. 4k) is slender and terminates in a long, straight and 

 styliform extremity tipped with a few hairs, planted at right angles to the surface of the 

 joint. The second pair of pereiopoda (figs. 4l, 4l') is unequally long and slender. The 

 posterior three pairs are moderately long and terminate in a long, sharp-pointed, curved 

 dactylos, armed on the inner surface with two teeth (fig. 4m) ; the propodos is long, 

 cylindrical, and armed on the flexor surface with two long and several short spines ; the 

 carpos distally overlaps the base of the propodos, and is armed with two small spines 

 on the posterior and flexor margin ; the meros is long, slender, cylindrical, and armed 

 on the posterior margin with several small spines. 



The first pair of pleopoda is single, the four succeeding are double-branched, and 

 the posterior pair is subequal in length with the telson. 



Pandalopsis, n. gen. (A. Milne-Edwards in litt.). 



Eesembles Pandalus, but has the flagella of the first pair of antennae slender, and 

 both branches longer than the carapace. 



The single species of this genus in the Challenger collection is the only one that I 

 have had an opportunity of examining. Beside the relatively greater length of the 

 flagella of the first pair of antennae, it differs from Pandalus in having the second pair 

 of gnathopoda more robust, the meros having the inner margin longitudinally developed 

 into a squamiform process fringed with long hairs, in having a broad squamiform process 

 anteriorly projecting on the under side of the ischium, and in having a pleurobranchia 

 above the second pair of gnathopoda and no mastigobranchia posterior to the first pair of 

 pereiopoda. 



Pandalopsis am/plus, n. sp. (PI. CXV. fig. 3). 



Carapace smooth and polished ; fronto-lateral margin armed with an antennal and a 

 fronto-lateral tooth, compressed anteriorly in the dorsal median line, elevated to a crest over 



