184 Memoirs of the Indian Museum. [Vol. IV, 



The inner spine of the bifurcate process of the uropods, though very much 

 shorter than the outer, appears to be noticeably larger than in the allied species. 

 There are only seven movable spines on the outer margin of the proximal segment of 

 the exopodite. 



Fukuda records a single male, 30-5 mm. in length, from Tanegashima, Osumi 

 Province, Japan. 



r8, Gonodactylus stoliurus (Müller). 



1880. Gonodactylus trispinosus, Miers, Ann. Mag. Nat. Hist. (5), V, p. 121 (partim) and p. 460 (fide 

 Pocock, 1893, p. 476). 



1886. Protosquilla stoliura, Müller, Verhandl. naturf. Ges. Basal, VIII, p. 477, pi. iv, fig. 2. 



1887. Protosquilla stoliura, de Man, Arch. f. Naturgesch., LIU, i, p. 576. 

 1894. Protosquilla stoliura, Zehntner, Rev. Suisse Zool., II, p. 213. 



1894. Gonodactylus stoliurus, Ortmann, Denk, med.-wiss. Ges. Jena, VIII, p. 61. 

 1902. Protosquilla stoliura, Schenkel, Verhandl. naturf. Ges. Basel, XIII, p. 582. 



The principal characters of this species seem to be as follows : — 



The carapace is only very slightly longer than wide, with a concave posterior 

 margin and rectangular, but rounded, antero-lateral angles. The rostrum bears three 

 sharp spines ; the median one reaches only to the base of the eyestalks, while those of 

 the lateral pair are slightly shorter. 



The eyes are cylindrical and the cornea is not wider than the stalk. The inner 

 edge of the raptorial dactylus is finely serrate, and the basal part is greatly inflated. 



The first four abdominal somites are smooth dorsally, with blunt postero-lateral 

 angles. The upper surface of the fifth is wrinkled and grooved in a symmetrical 

 fashion. On the sixth somite there are six dorsal prominences, those of the median 

 pair are rounded, the others eroded at the margins. The surface of the sixth somite 

 and hinder part of the fifth is beset with numerous very small spinules. 



The telson is distinctly broader than long and bears, as usual, three prominent 

 rounded elevations on its dorsal surface. The median boss is triangular in shape, while 

 those of the lateral pair are pyriform, rounded posteriorly, and reach to the distal third 

 of the telson. On either side, between the lateral elevations and the thickened external 

 margin, there is a well-marked rounded longitudinal ridge. On the distal margin there 

 are eight broad triangular teeth ; between the two submedians there is a very narrow 

 fissure extending forwards almost to the base of the median boss. The teeth on either 

 side are separated by short notches and bear small spinules on their edges. In addition 

 the whole surface of the telson is beset with spinules similar to those found on the two 

 preceding somites. 



The outer spine of the process from the base of the uropods is twice the length of 

 the inner. The basal segment of the exopod bears ten or eleven spines on its external 

 margin. 



By the length of the lateral elevations on the telson, and by the very narrow median 

 fissure in the middle of the distal margin, this species is easily distinguished from all 

 species except G. glaber ; from the latter it may be separated at a glance by the wrink- 

 ling in the median part of the fifth abdominal somite, by the presence of four pairs of 



