126 CARL BOVALLIUS, THE OXYCEPHALIDS. 



Syn. 1841. Oxycephalus armatus, [H. MILNE EDWARDS]. EYDOUX and 



SOULEYET. 8, p. 267, pi. 



4, % 13-32. 

 Rhabdosoma armatum, C. GLAUS. 1871. 23, p. 155. 



1879. 27, p. 197 (51). 



1887.36, p. 74, pi. 



25, fig. 1-6, 



pi. 26, fig. 5. 



TH. STEERING. 1888. 39, p. 1607. 



1862, Rhabdosoma White!, ! ) SPENCE BATE. 20, p. 345, pi. 



TH. STREETS. 1878. 26, p. 287, pi. 



2, fig. 6. 



Rhabdonectes C. BOVALLIUS. 1887. 35, p. 39. 



1887. Rhabdosoma iuvestigatoris, G. M. GILES. 37, p. 2 19, pi. 4. 



The original description of SPENCE BATE in 1862 was fully suf- 

 ficient for the identification of his species. I give here the most im- 

 portant passages of it. 



Sixth segment of the pleon (= the last coalesced ural seg- 

 ment) not longer than the preceding. First pair of gnathopoda 



having the coxa (= the epirneral) anteriorly produced to an obtuse point; 

 carpus broadly infero-anteriorly produced as far as the inferior angle 

 of the propodos; propodos short, stout, inferior angle anteriorly pro- 

 duced; dactylos long, arcuate, capable of antagonizing at the apex with 

 the extremity of the carpus only. Second pair of gnathopoda much 

 longer than the first; carpus infero-anteriorly produced beyond the ex- 

 tremity of the propodos, the process being slender and curved, terminat- 

 ing in a fine point; propodos increasing towards the distal extremity, 

 inferior angle slightly anteriorly produced; dactylos arcuate, antagonizing 

 at the extremity with the apex of the carpus. Pereiopoda gradually in- 

 creasing in length posteriorly, the fourth pair being the longest; fifth 

 obsolete. Antepenultimate pair of pleopoda reaching to half the length 

 of the ultimate; peduncle having the outer margin coarsely, the inner 

 finely serrated: penultimate pair originating on the inner side of the 

 preceding, and longer than the sixth segment of the pleon (== the last 

 coalesced ural segment); peduncle having the outer margin coarsely, the 

 inner finely serrated; ultimate pair nearly as long again as the sixth 



1) SPENCE BATE, in his publication of 1861 (19, p. 15, pi. 1, fig. 4) gave 

 a drawing of the animal, and mentioned the name Rhabdosoma Whitei, but only in 

 the explanation of the plates, and without the slightest description. 



