.'5S "ENIIEAVOCK" SCIENTIFIC RESTLTS. 



of each is indicated by a blunt hump as though the spine 

 had been accidentally destroyed at some time during the 

 life of the individual, and the injury subsequently over- 

 come without regenerating the spines. The telson of the 

 male specimen is somewhat damaged. Alcock speaks of 

 but three pairs of very small, obscure and hardly per- 

 ceptible spinules. In T. eurriroxtrix too, all the spines 

 are fairly small. There always has been much con- 

 fusion regarding the number of marginal spinules in the 

 several species of Trachypcnciis as described (cf. Bate, 

 Ortniann, Haswell). Therefore is it not possible that 

 Alcock may have overlooked a possible tiny pair close 

 upon the bases of the subterminal pair? 



Further, de Man's intermediates, if you Avill, have the 

 antero-lateral angles of the carapace "rather obtuse," on 

 the basis of which they tend to stand nearer true eurri- 

 roxtrix than iixftei' as described by Alcock. Alcock has 

 remarked that among other features, T. aspcr differs from 

 T. currirostris in that "the antero-inferior angles are 

 sharper," but in occasional specimens of T. currirostrix 

 the anterior-inferior angles of the carapace appear quite 

 as prominent and sharp as shown in Alcock's figure, 

 even though they could not be described as what he 

 designates in aspcr, "distinctly dentiform." 



The specimens which Miers listed as T. granulosus 

 in his "Alert" report are said by Alcock to be the same 

 as ancJioraUs Bate. Consequently on the basis of what 

 that species was heretofore supposed to be, such an 

 identity would render them synonymous with T. curvi- 

 roxtrix Stirnpson. 



Balss has more recently listed T. as per from Western 

 Australia, 4546 miles W.S.W. of Cape Jaubert, 50-140 

 feet. From his citations I take it he follows Pesta in 

 the separation of his material from T. curriroxtris. It 

 seems, therefore, as regards the post-rostral carina that 

 his specimens are much like those taken by the 

 "Endeavour." But in all this discussion even though 

 these "Endeavour" specimens might some time be deter- 

 mined as a distinct species, the fact should not be over- 

 looked that Alcock described the post-rostral carina of 

 his species as "low, broad and faint; nearly reaching 

 the posterior border of the carapace." The several speci- 

 mens Pesta determined as aspcr are, by the way, listed 

 as juvenile by him. 



