168 



4. Paratylus Smitti (Goes). 



(PI. 165, fig. 1). 



Parawphithoe Smitti, Goes, Crust, amph. maris Spetsb. p. 8, f. 14. 

 Syn. : Atylus Smitti, Boeck. 



Body highly compressed, and very distinctly keeled dorsally, the carina 

 being elevated in the last segment of mesosome and those of metasome to 

 rather large, triangularly-compressed projections. First segment of tiresome, 

 as usual, with 2 successive dorsal projections, the posterior very large and 

 nearly linguiform in shape. Cephalon produced in front to a rather prominent 

 acute rostrum, reaching beyond the middle of the basal joint of the superior 

 antennae, anterior edges of cephalon very slightly bulging out in the middle, 

 and forming below a narrowly-rounded, deflexed lappet, denned posteriorly 

 by a deep notch. Coxal plates comparatively small, and decreasing somewhat 

 in depth posteriorly; 1st pair very narrow and deeply concaved anteriorly, 

 with the outer part somewhat expanded, and having the anterior corner 

 narrowly produced, distal edge slightly serrated and edged with small 

 bristles; 2nd pair likewise rather narrow, and having the distal edge armed 

 in a similar manner ; the 2 succeeding pairs much broader, and scarcely as 

 deep as the corresponding segments, distal edge slightly emarginated in the 

 middle; 5th pair with the anterior lobe terminating in a downward curving 

 point. Last pair of epimeral plates ofmetasome rather narrow, and forming 

 at the lateral corners a very slight angle. Eyes comparatively small, 

 rounded, pigment carmine. Superior antennae very slender, nearly equalling 

 half the length of the body, 1st joint of the peduncle much shorter than 

 the 2nd, and not produced at the end posteriorly, last joint extremely small, 

 flagellum about twice the length of the peduncle, and composed of numerous 

 short articulations. Inferior antennas but little longer than the superior, and 

 having the last 2 joints of the peduncle about equal-sized, flagellum about 

 the length of the peduncle. Gnathopoda very slender, especially the posterior 

 ones, and densely setous on both edges, propodos in both pairs shorter than 

 the carpus and scarcely broader, palm somewhat oblique and much shorter 

 than the hind margin. The 2 anterior pairs af pereiopoda of normal structure; 

 the 3 posterior ones comparatively slender and elongated, with the propodal 

 joint much shorter than the carpal one, and the dactylus scarcely recurved, 

 basal joint of the antepenultimate pair but very slightly produced at the 

 infero-posteal corner, that of last pair rather expanded, with the posterior 

 edge considerably curved and densely setous, outer part of the joint abruptly 



