113 



characters in common, as indicated in the above diagnosis. As the genus 

 M//i'oi><mtiti* was the first established of the two, the name of the family must be 

 derived from that genus. 



Gen. 26. MyZOpOntlUS, Giesbrecht, 1895. 



Generic Characters. Anterior division of body moderately dilated, with 

 the cephalic segment comparatively large, and the epimeral parts of the trunk- 

 segments only slightly angular. Tail slender, though not much elongated. Caudal 

 rami moderately produced. Anterior antennae slender and only sparingly seti- 

 ferous; those in male distinctly hinged, and provided with supplementary sesthe- 

 tasks. Posterior antennae likewise comparatively slender, with the penultimate 

 joint well defined and the terminal joint rather elongated. Oral cone produced 

 into a slender siphonal tube. Mandibles very narrow. Maxillae with the inner 

 lobe shorter than the outer, and provided with only a single apical seta. Both 

 pairs of maxillipeds very slender. Terminal joint of outer ramus in 1st pair of 

 natatory legs with 3 setae inside; same joint in the 3 succeeding pairs with 5 

 setae. Last pair of legs very small. 



Remarks. This genus was established in the year 1895 by Giesbrecht, 

 to include a species found by him in the Bay of Naples. In the elaborate 

 monograph of the Asterocheridce by the same author, this genus was placed at 

 the head of the sub-family Dyspotttivnce, and its differences from the more 

 typical genera, showing an approach to the Asterocherince (= Ascomyzontidcv), 

 were pointed out. The genus as yet only comprises a single species, to be 

 described below. 



64. Myzopontius pungens, Giesbr. 



(PL LXVIII). 

 Myzopontius pungens, Giesbrecht, Asterocheridse, p. 106, PL 1, tig. 6, PL (3, figs. 114. 



Specific Characters. Female. Body moderately slender, with the anterior 

 division oblong oval in outline, greatest width slightly exceeding half the length. 

 Cephalic segment very large, occupying almost half the length of the body, frontal 

 edge evenly curved, pleural parts incurved and rather broad; rostral projection 

 extremely small. The 3 succeeding segments gradually diminishing in size and 

 having the epimeral parts slightly angular behind. Tail scarcely attaining half 



15 Crustacea. 



