218 



accessory ajipendage (fig. 5) is rather fully developed, equalling half the 

 length of the peduncle, and is composed of about 7 articulations. 



The inferior antennae, as in most of the typical Gammari, are shorter 

 than the superior and somewhat more densely setiferous. The last 2 joints 

 of the peduncle are nearly equal-sized and combined somewhat longer than 

 the flagellum, which is composed of about 8 articulations. 



The gnathopoda (figs. 6 and 7) are rather unequal in size, the posterior 

 ones (fig. 7) being much stronger than the anterior. In structure they agree 

 rather closely with those in the female of the preceding species, the carpus 

 being in both pairs comparatively short and expanded distally, with a 

 rounded setiferous lobe below. The propodos in both pairs considerably ex- 

 ceeds in length the 3 preceding joints combined, and in the posterior pair 

 is much larger and more tumid than in the anterior. The palm is somewhat 

 oblique and defined below by an obtuse angle carrying a strong spine 

 followed by a few much shorter ones. The hind margin of the propodos in 

 both pairs is provided with numerous small tufts of bristles. 



Of the pereiopoda, the 2 anterior pairs (fig. 8) exhibit the usual slender 

 form. The 3 posterior pairs are, on the other hand, rather stout and have 

 their outer part edged with fascicles of strong spines and scattered bristles. 

 As usual, the antepenultimate pair (fig. 9) are considerably shorter than 

 the 2 succediug ones, and have the basal joint of a somewhat irregular 

 quadrangular form, with the infero-posteal corner nearly rectangular. In 

 the penultimate pair (fig. 10) the basal joint is somewhat larger and more 

 expanded in its proximal part, the posterior edge being boldly curved above 

 and not all produced at the infero-posteal corner. The last pair (fig. 1 1) 

 about equal in length the penultimate pair, and have the basal joint much 

 larger than in any of the preceding pairs and of a rounded quadrangular 

 shape, forming posteriorly a broad laminar expansion, which terminates 

 below in a short, narrowly rounded lobe. The posterior edge of the ex- 

 pansion is slightly curved and, as in the 2 preceding pairs, exhibits a number 

 of distinct serrations, each carrying a small hair. 



The 2 anterior pairs of uropoda (figs. 12 and 19) are normal in structure, 

 though less coarsely spinous than in the preceding species, their inner ramus 

 having only a single lateral spine and the outer no lateral spines at all. 



The last pair of uropoda (fig. 13) considerably project beyond the others, 

 and on the whole agree in their structure with those in the preceding species; 

 the inner ramus being very small and scale-like, whereas the outer is rather 

 elongated and densely edged with long ciliated setse, and having besides a 

 few fascicles of short spines. The terminal joint of the ramus is very small 



*n3.-MaT. cip. 21S. • 40 



