KEPOHT ON THE CRUSTACEA MACRURA. 181 



which corresponds with a dactylos of its own length ; the three posterior pairs of pereio- 

 poda are long and slender, the dactylos remarkably so, and fringed with a lew- 

 long hairs ; the antepenultimate and penultimate pairs support cadi a podobranchia, 

 mastigobranchia, and two arthrobranchiaa, but the posterior pair has none. 



The first pair of pleopoda (PI. XXIV. p) is situated near the ventral median 

 line, and consists of two joints rigidly connected and directed forwards. 



The second pair (q) is attached to the inner side of the posterior margin of the coxal 

 plate, and consists of a long basal joint carding a pair of long, flattened, narrow branches, 

 fringed with long ciliated hairs, the inner branch being furnished with a long, cylindrical, 

 slender stylamblys, armed with a few obtuse hooks at the apex. 



The three following pairs of pleopoda are similarly formed, but the stylamblys 

 becomes gradually more slender in each successive pair. 



The ultimate pair of pleopoda has a short basal joint carrying the two large, 

 squamous plates of the tail-fan, the outer one having a diaeresis which divides the 

 plate near the middle, and both are armed on the outer side by a strong, sharp, posteriorly- 

 directed tooth. 



The telson is long, quadrate, with the sides subparallel, terminating in two sharp 

 spines, which are continuous with two strong ridges that begin at the base near the 

 median line ; the posterior margin is thin, convex, and fringed with long simple 

 hairs. 



Nephropsis agassizii, A. Milne-Edwards, 1 is probably this species. 



Nephropsis suhmi, n. sp. (PI. XXIII. fig. 3 ; PL XXIV. fig. 2). 



Carapace coarsely granulated. Rostrum more than half the length of the carapace, 

 armed on each side with two large and seven small teeth, also one on each side of the 

 base and one on the antennal region. 



First pair of pereiopoda having three teeth on the upper distal margin of the meros 

 and one on the lower ; carpos armed at the distal extremity with one large tooth above 

 and one below. Pleon, having the coxal plates produced to a point, the anterior margin 

 being furnished with a small point or sharp cusp. 



Length 38 mm. (1*5 in.) ; sex undetermined; associated with Phoberus tenuimanus. 



Habitat.— Station 191, Sept. 23, 1874; lat. 5° 41' S., long. 134° 4' 30" E.; off 

 Dobba, Arrou Island : depth, 800 fathoms ; bottom, green mud ; bottom temperature, 

 39°-5. 



The carapace, from the posterior margin to the extremity of the rostrum, is rather 

 longer than the posterior division of the animal. Rostrum two-thirds as long as the 



1 Ann. d. Sci. Nat.(Zool), sen 6, vol. is. p. 124, 1879. 



