"ENDEAVOUR" SCIENTIFIC RESULTS. 



is, of course, the possibility that it might prove to be 

 the male of T. granulosus, of which females in three 

 instances were associated with females of T. anchoralix 

 (Re-. Xos. E.6IJ18, 6615 and 6611). 



This lone male is approximately 54 mm. long, of 

 which length the carapace and rostrum together re]) re- 

 sent 19-5 mm., and the rostrum alone 7 mm. It agrees 

 in most particulars quite closely with the female. The 

 rostrum is fairly straight, but no more than in some 

 of the females. It is armed above with eight teeth 

 exclusive of the epigastric. The post-rostral earina is 

 evident nearly to the hinder margin of the carapace, 

 though becoming broader and less distinct posteriorly. 

 The antero-lateral angle is blunt and not produced. 



Likewise the abdomen is "much as in the female, 

 the fifth somite being about three-fourths the length 

 of the sixth. The telson is broken. 



The petasma is of the same general type as that 

 of T. salaco, symmetrical, and reaching as in that species 

 the coxae of the fourth legs; the lateral hooks with 

 which it is provided, however, attain the coxae of the 

 ] (receding pair of legs. The two branches are united on 

 their anterior or dorsal surface, but leave below or 

 posteriorly a narrow fissure between them. Distally the 

 petasma ends in two apparently truncated "horns." The 

 truncation is produced by the upward-turned and 

 forward-twisted, and in part outwardly rotated slender 

 extremities of these "horns," which form the lateral 

 hooks, so-called above. Just short of the rounded end 

 of these slender processes or hooks there is an upward-cut 

 notch, making the end of the hook resemble much the 

 tip of a crochet needle. The transverse lamina on the 

 anterior margin of each "horn" of T. xalaco is represented 

 in this species by a platelet placed just about as far 

 laterally, as seen in ventral view, as is possible without 

 touching the lateral hook of the corresponding horn. 

 Medially there are two joined, ventrally curved lobes 

 which have their counterparts in T. salaro and corres- 

 pond to the submedian teeth in T. curriroxtrix. Much as 

 in T. xalaco also, there is developed on the posterior 

 surface of the petasma, at the level of the middle of the 

 laterally directed portions of the "horns," a suggestion 

 of a tooth on either margin of the median fissure. 



