-MACRI-RA. SCI I MITT. 329 



slightly more curved rostra, but they are well within 

 the limits of variation common to any fair series of the 

 species. According to Alcock, the number of rostral 

 teeth in P. monoceros varies from 9-12; Haswell counted 

 8-9 in his tnaxtersii, but two of the Cooktown specimens 

 have nine, and the third, the smaller male, has ten. As 

 stated before, the rostrum of the cotype lacks its tip, and 

 ends at about the middle of the second segment of the 

 antennular peduncle. On it eight teeth are to be counted. 

 Of the "Endeavour" specimens, eight have ten teeth 

 above, four have nine, and one has eleven teeth ; in the 

 others the rostra are incomplete. 



PEX.KOPSIS KXDEAVOUKI, new .v/nr/rx. 

 (Plate lix., figs. 1-3. Plate Ixviii., fig. 4.) 



Occurrence. 11-14 miles N.W. of Pine Peak, Queens- 

 land, 24-26 fathoms; one female (Reg. No. E.6613). 



Southern Queensland coast ; nine males and four 

 females (Reg. Nos. E.3198-9, E. 6687-8, P.3583, P.3585, 

 P.3589) ; E.3199 is the female holotype. 



Dewrijttion. A very pubescent species, so closely 

 related to P. intcrmedius (Kishinouye) 21 that the two 

 are difficult to differentiate without recourse to the 

 shapes of the petasma. and thelycum. There are also 

 some differences in the arrangement of the pubescent 

 areas on the body. 



The lateral pubescent areas of the carapace are 

 much larger in P. endeavour}, occupying the greater part 

 of the branchial region, which is for the greater part 

 bare in P. intcrmedius. Similarly, the roughly circular 

 pubescent areas on all but the first of the abdominal 

 epimera in P. intermedium arc never more than half 

 the width of the corresponding epimerou, and usually 

 scarcely more than a third of its width; in P. endeavouri 

 the similarly placed, irregularly triangular patches 

 always occupy more than a half, and usually two-thirds 

 of the epimera. The two pubescent patches on the 

 epimeron of the first somite in P. intermedium are 

 separated by an interval considerably wider than either 

 patch, while in P. endeavouri each patch is more than 

 twice as wide as the interval between them. 



21 Kishinouye, Journ. Fish. Bur. Tokyo, viii.. 1900, p. 21. 



