364 (!. 0. SARS, 



than the peduncle, being composed of about 16 articulations. The acces- 

 sory appendage about equals in length the 2nd peduncular joint, and is 

 composed of 4 articulations. The inferior antennae are a little shorter than 

 the superior and of the usual structure. 



The gnathopoda (figs. 4, 5) are not nearly so strongly developed as in 

 the female of G. robustoides, and are also less unequal. The propodos of the 

 anterior ones (fig. 4) is oval in form, with the palm rather oblique and 

 defined below by a very slight angle, carrying 2 strong spines. In the post- 

 erior pair (fig. 5) the propodos is somewhat more elongated and of an oval 

 quadrangular form, the palm being nearly transverse. 



The 2 anterior pairs of pereiopoda (fig. 6) are less strongly built than 

 in G. rohiistoides, but are otherwise of a rather similar structure 



The 3 posterior pairs of pereiopoda (figs. 7—9) are moderately slender, 

 and have their outer part edged with fascicles of spines and delicate bristles. 

 In all the basal joint is rather expanded, though of very different size. In 

 the antepenultimate pair (fig. 7) this joint is of a rounded quadrangular 

 form, with the infero-posteal corner somewhat projecting; in the penulti- 

 mate pair (fig. 8) it is somewhat larger, being strongly expanded posteriorly, 

 with the hind edge boldly curved and distinctly serrate, each serration 

 carrying a short bristle. The last pair (fig. 9) are highly distinguished by 

 the very large size of the basal joint, which expands at the infero-posteal 

 corner to a broad, obtusely truncated lobe, reaching nearly to the middle of 

 the meral joint. The posterior edge of the joint is distinctly serrate through- 

 out, and provided with a number of short bristles corresponding to the 

 serrations. Of the outer joints in these legs, the carpal one is a little shorter 

 than the propodal joint. The dactylus is in all very strong and curved. 



The 2 anterior pairs of uropoda (fig. 10) have the rami nearly equal- 

 sized and each tipped with several spines, one of which is longer than the 

 others; the inner ramus has also one or two lateral spines, whereas the 

 outer is without such spines. 



The last pair of uropoda (fig. 11) nearly agree in their structure with 

 those in G. robustoidcs. 



The telson (fig. 1 2) is scarcely as long as it is broad, and has, on the tip 

 of each half, 2 spines accompanied by 2 delicate hairs. 



The adult male (fig. 13), as usual, attains a somewhat larger size than 

 the female, the length of the body amounting to 12 mm. It is of a some- 

 what more slender and compressed form, and also easily recognizable by the 

 strong development of the gnathopoda. 



The latter (figs 14, 15) are very unequal, the posterior ones (fig. 15) 

 being much more powerful than the anterior, with the propodos exceedingly 



^H3.-MaT. cTp. 344. 22 



