588 MRS. E. W. SEXTON ON THE 



arranged in transverse rows in addition to the marginal fringe. 

 5th joint slightly longer than 6th ; 6th twice as long as broad, 

 widening a little towards the palm. The palmar margin is convex, 

 its limit defined, as in the preceding species, by a long sensory 

 spine inset on the under surface ; on the outer surface it carries 

 a submarginal row of about 10 strong sensor}^ spines, and on the 

 inner side a thick row of setiform spines. The finger when closed 

 reaches to the large spine ; it is curved, with a strong auxiliary 

 tooth subapically, and 6 smaller teeth on the inner margin, each 

 tooth with a setule beside it. In the notch near the apex 2 or 3 

 longer setules are inset. 



Dr. Pesta's description is as follows (text-fig. 146, d) : " das 

 Handglied des 1. Gnathopoden ist vorne etwas verbreitert, die 

 Klaue so lang wie die konvexe Seite desselben ; der konvexe Rand 

 die ' Hand ' besitzt eine Reihe von kraftigen Dornen, die gegen 

 die Klane gerichtet sind." 



Second Gnathopod (fig. 18) : 2nd joint unusually long, equalling 

 in length the joints 3-6 taken together ; 3rd, 4th, and 5th joints 

 subequal to each other measured along the inner side. The finger 

 is nearly straight, about half the length of the preceding joint ; 

 " leicht gebogen und spitz" (text-fig. 146, e). 



Perceopods 1 and 2. — The length of the 4th joint forms a dis- 

 tinguishing character for this species. The perseopods are about 

 the same length, but in perteopod 1 the basal joint is longer than 

 in perseopod 2 ; and the 4th joint is longer in the latter than in the 

 formei', being equal to the basal joint in length. Dr. Pesta says 

 " das 4 Glied des 1. Peraeopoden ist langer als das 6 Glied und fast 

 so lang wie das 2 Glied." {Cf. text-fig. 146, c, with Norman's pi. xii. 

 fig. 8 and Delia Valle's pi. xii. fig. 24.) The 2nd joint carries 

 posteriorly numerovis delicate sensory setee, some of great length ; 

 4th joint long, of equal breadth throughout ; 5th about half as 

 long as the 4th ; 6th longer than 5th, both Avith clusters of long 

 sparsely feathered setse posteriorly ; finger shortei- than the 6th, 

 subequal to the 5th in length, with the glandular aperture 

 opening at the tip. 



Hinder Perceopods (fig. 19) as figured by Delia Valle. In perseo- 

 pod 3 the basal joint has the posterior margin straight and 

 crenulate ; in perseopod 5 the posterior expansion of this joint is 

 much wider distally than at the base, and the margin is rounded 

 and serrate, the lower portion carrying numerous plumose setae. 

 Fingers curved and falciform. In Heller's specimen, perseopod 3 

 is missing, but Dr. Pesta says of the last two pairs " die End- 

 klauen sind einfach (nicht ' bifid ')," as in Spence Bate's hirsuti- 

 mana. In Norman's figure, pi. xii. fig. 9, the terminal joints 

 g-re lying in such a position as to quite conceal the spines. 1 have 

 therefore refigured them to show the ai-mature. 



Uropods 1 and 2 (text-fig. 146, g) much as in guttatus Grube ; 

 very spinose, the spines of uropod 2 shorter and much stouter than 

 those of uropod 1 . The falciform process of the peduncle reaches, 

 in uropod 1, to the tip of the outer ramus; in uropod 2 beyond 

 the tip. The inner rami differ fx-om the other species in having 



