480 Zoological Society : — 



large lobe with another tubercle inside. There is a considerable space 

 left between the moveable finger and the fixed one ; the edge of the 

 latter is toothless, but is hollowed on the inside and at the base, 

 where it is covered with closely placed rounded tubercles ; the im- 

 moveable finger is not much arched, and is pointed. The outside 

 and greater part of the inside of the claw are very smooth, the lower 

 edge being fringed with long and rather coarse hairs, which are ar- 

 ranged in tufts, as they are also, in a double row, on the upper edge 

 of the moveable finger. There are, besides, four rows of distant tufts 

 of hair on the outside of the greater claw. Wrist sharp-edged above 

 and below, and crenulated on the lower margin. Rostral process 

 with three short sharpish teeth. Third, fourth, and fifth abdominal 

 segments with a large tuft of hairs covering the greater part of a 

 pellucid space on each side, in the third and fourth behind the middle 

 of the segment, in the fifth about the middle. 



Central caudal plate rather broader than long, at the end three- 

 lobed, the central lobe the longest and the largest : this central plate 

 has two longitudinal furrows, which divide it into three parts, the 

 central part bulging at the base, from the large rounded tubercle 

 which nearly covers it. Outer plate as if formed of two anchylosed 

 plates, with a rounded outer margin, which is closely and densely 

 covered with brown hairs. On the upper side these hairs extend 

 over nearly the apical half of one (the outer) of the two portions of 

 which the outer plate seems to be formed. 



In the Illustrated Proceedings of the Society for 18.50 there is the 

 description and figure of a fine species of Gonodactylus, belonging to 

 the second section of the genus as defined by Milne-Edwards, that 

 in which the rostral plate is rounded and not pointed in front. The 

 species is from China, and, from the peculiar armature of the caudal 

 ring, received the name of G. cultrifer. The species now described 

 is remarkable for the singularly armed caudal ring, which, with the 

 sixth abdominal segment, is covered with outstanding spines. This 

 species, which I have named Gonodactylus Guerinii, belongs to the 

 first section of the genus, that in which the rostral plate is armed on 

 the median line with a long spiniform tooth. It was obtained on the 

 voyage of H. M.S. 'Herald.' 



Genus Gonodactylus, Latr. 

 Gonodactylus Guerinii, n. s. 



G. carapace subquadrato, processu rostrali spinis trihus longis 

 armato ; abdominis segmento quinto ad apicem breviter spino- 

 sulo, segmentis quinto et caudali spinis plurimis longis erectis 

 armatis. 

 Long. unc. 2\. 

 Hab. Matuka, Fiji Ins, 



Carapace as wide behind as long, in front almost a third narrower 

 than behind, the central plate extending beyond the lateral plates 

 over the base of the rostral process ; the anterior lateral angle of 

 outer plate subquadrate, the posterior lateral corner subrotundate ; 



