228 Annals of the South African Museum. 



FAMILY DAJIDAE. 



1887. Dajidae, Giard and Bonnier, Travaux de 1'Inst. Zool. Lille, 



vol. 5. 



1893. Stebbing, Hist. Crust, p. 398. 

 1895. Dajinae, Hansen, Isopoden d. Plankton Exp. p. 22. 

 1897 (-1899). Dajidae, G. O. Sars Crust. Norw. ii. p. 221. 

 1905. Dajidae, Eichardson, Bull. U.S. Nat. Mus. No. 54, p. 572. 



GEN. ZONOPHEYXUS, Eichardson. 



1903. Zonophryxiis, Eichardson, Bull. U.S. Fish. Comm. p. 51. 



1904. ,, id. Proc. U.S. Nat. Mus. vol. 27, p. 677. 



1910. id. Washington Bur. Fish. Doc. 736, p. 41. 



1911. Koehler, Bull. Inst. ocean. Monaco, No. 196, p. 16. 



ZONOPHRYXUS QUINQUEDENS, n. Sp. 



(Plate XXII.) 



Body of $ oval. The dorsal surface shows four thoracic segments 

 marked by indistinct sutures and four abdominal segments of which 

 the sutures are very clear and deep in the middle line but indistinct 

 laterally. The thoracic segments are more marked ventro-laterally. 

 The margin which surrounds the body ventrally has 4 small notches 

 in the thoracic region and posteriorly is produced into 10 triangular 

 teeth, 5 on each side without a median one. 



The external antennae are apparently 1-jointed (not 2- jointed as in 

 Z. grimaldii). The internal antennae are large and laminar, indis- 

 tinctly divided into two portions, of which the posterior embraces 

 the upper and lower lips (rostrum). 



Upper lip broad, margin entire, very slightly emarginate on either 

 side of a central convexity. 



Lower lip narrower, tapering, with distal end deeply indented. 

 Both lips are curved towards one another at the sides so as to form a 

 cone. Through the opening at the apex of this cone project the 

 narrow gouge-shaped mandibles. 



Maxilla. In one specimen there were two appendages lying 

 beneath the maxillipeds and about in the same position, the "palp " 

 pointing outwards as does the epipod of the maxillipeds. Both the 

 palp and the outer margin of the basal plate are minutely serrulate. 

 In two other specimens I have failed to find any trace of these 

 appendages. Koehler (I.e.) makes no mention of them, but says he 



