1913-] S. Kkmp: Crustacea Stomatopoda of the Indo-Pacific Region. 181 



1865. Gonodactylus trispinosus, Heller, Reise ' Novara ' Kxped., Crust., p. 126. 



1876. Gonodactylus trispinosus, Miers, Cat. Crust. N. Zealand, p. 90. 



1880. Gonodactylus trispinosus, Miers, Ann. Mag. Nat. Hist. (5), V, p. 121, pi. iii, fig. 10 (partim). 



1882. Gonodactylus trispinosus, Haswell, Cat. Australian Crust., p. 211. 



1886. Gonodactylus trispinosus, Filhol, Miss., de l'île Campbell, III, 2e, p. 436. 



1886. Protosquilla trispinosa, Brooks, Voy. H.M.S. ' Challenger,' XVI, Stomatop., p. 71. 



1891. Protosquilla trispinosa, Chilton, Trans. N. Zealand Inst., XXIII, p. 61. 



1893. Gonodactylus trispinosus, Pocock, Ann. Mag. Nat. Hist. (6), XI, p. 476. 



1898. Protosquilla trispinosa, Borradaile, Proc. Zool. Soc, p. 33, pi. v, figs. 1, xa. 



1899. Protosquilla trispinosa, Borradaile, in Willey's Zool. Results, p. 400. 



This species and G. tuber sus may be distinguished at a glance from the two pre- 

 ceding forms by the close and conspicuous corrugations in the middle of the fifth abdo- 

 minal somite. In other respects G. trispinosus is very similar to G. pulchellus, from 

 which, according to Borradaile's description and figures, it would seem to differ only in 

 the following features : — 



1. The antero-lateral angles of the carapace are not subacute, scarcely even 



rectangular. 



2. The lateral margin of the last thoracic somite is broadly rounded. 



3. The bosses on the last abdominal somite and telson are clothed with setae as in 



G. pulchellus, but the lateral pair on the telson are rather more broadly oval in 

 outline. The telson is also rather more rounded at the apex than in the allied 

 species, and the surface behind the elevations, in place of being reticulate, is 

 marked with parallel impressed lines. The fissures in the distal margin do not 

 appear to be widened proximally. 



I have seen no examples of Gonodactylus trispinosus. It has been recorded from 

 the Fiji Is. (Dana) ; Loyalty Is. (Borradaile) ; Auckland Is. (Heller) ; Swan R., W. 

 Australia (Miers); and Baleine Bank, N.W. Australia (Pocock). Chilton considers 

 Heller's record doubtful. 



Hoffmann (1874, p. 43) includes G. trispinosus in a list of Stomatopods from Mauri- 

 tius ; but Miers and Brooks both regard this record as untrustworthy and a consideration 

 of the known geographical range of the species supports their view. Pocock notes, on 

 Hansen's authority, that the two specimens from Sharks Bay which Miers referred to 

 this species are in reality examples of Müller' s G. stoliurus. 



15. Gonodactylus tuberosus, Pocock. 



1893. Gonodactylus tuberosus (? var. of G. trispinosus) Pocock, Ann. Mag. Nat. Hist. (6), XI, p. 476, 

 pi. xx B, fig. 2. 



This species l seems to bear much the same relation to G. trispinosus that G. 

 nefandus does to G. pulchellus. 



The rostrum is very similar to that of G. nefandus, but the lateral spines are even 



1 Pocock does not mention the median corrugations on the fifth abdominal somite, but from his re- 

 marks concerning the close resemblance of this species to G. trispinosus (specimens of which were before 

 him at the time) the presence of this important character may be inferred. 



