242 E. W, SEXTON. 



dage ; palm covered on the under surface with long stout setae ; finger 

 carrying one small spine and a few setae distally ; nail strong, curved. 



In the female (Fig. 11) the gnathopod is much larger and stouter 

 than in the male. The first joint is as broad as long, distally expanded ; 

 second joint slightly longer, furnished on both margins with a pectinate 

 scale-like armature. This armature is also found on the anterior margins 

 of the fourth, fifth, and sixth joints. The hand as described by Norman 

 and Stebbing is pyriform, upper portion well rounded, palm with a well- 

 developed process projecting forward near the base ; inset on the under 

 surface near the finger is a cluster of stout setae similar to those of the 

 male. 



Anthura gracilis. Fio. 9. — First Gnathopod, upper .surface, ,^, Eddystone specimen, 



X 42. 

 Fig. 10. — First Gnathopod, under surface, c?, Eddystone specimen, 



X 42. 

 Fig. 11. — First Gnathopod, upper sui-face, ?, X 42. 



Gnaihofod 2 and Peraeopod 1 alike in construction in both sexes. The 

 first joint is longer than the second ; third half the length of the first, 

 strongly lobed posteriorly ; fourth very small, triangular ; fifth as long 

 as the first, nearly parallel-sided, front margin finely pectinate, the 

 microscopic spines arranged in semicircles giving the effect of over- 

 lapping pectinate scales down the whole length of the margin ; two 

 strong spines inset at the insertion of the finger. Finger long, finely 

 pectinate, carrying one strong spine and some setae at the base of the 

 nail, and two or three small spines proximally. Scattered over all the 

 appendages are many mobile sensory hairs, each hair consisting of a 

 shaft and a fine flagellum. These hairs are most numerous on the palm. 



Peraeopods 2, 3, 4, and 5 alike in construction, a little shorter and 

 stouter in the female. The first joint is slightly longer than the second ; 

 third and fourth shorter, subequal in length ; fifth about the length of 

 the first ; finger two-thirds the length of the fifth. The first three 

 joints are constricted proximally, the third lobed posteriorly. In all 



