124 PROCEEDINGS OF THE NATIONAl, MUSEUM vol. loi 



bearing a setiferous projection on distal margin near medial border 

 of each sympodite. Second male pleopod with a styliform proximal 

 endopodite branch and a lamellar, somewhat rectangular, exopodite 

 whose caudal end is blunt and setiferous. Uropods 2-branched, ex- 

 ceeding one-half the pleotelson length; inner branch as long as or 

 longer than the outer branch. Female operculum widely ovate, with 

 a small median concavity on posterior border. Mandibular molar 

 process with an expanded, truncated, toothed, setiferous tip; palp 

 3-jointed and bearing on distal third of second joint along medial 

 margin two large denticulate setae and a diagonal row of similar 

 but smaller setae on outer surface; last mandibular palp segment 

 very much twisted at tip. Inferior border of proximal third of first 

 peraeopod propodus with a number of subequal serrations. Carpal 

 joint of first peraeopod swollen and beset with many 2-pointed setae 

 on inferior margin ; dactylus with two claws. Dactyls of other perae- 

 opods with three claws. Pleon composed of a short anterior segment 

 and a wide shieldlike pleotelson. 



This genus appears to be intermediate between lolella and 

 laniropsis. It resembles laniropsis in having dorsally visible epi- 

 meral plates on peraeon somites 2-7. It resembles lolella in that 

 most of the species have the lateral peraeon margins produced into 

 lappets. It differs from both genera in having a series of serrations 

 on the inferior border of the proximal third of the propodus of the 

 first peraeopod and in having a row of small denticulate setae between 

 two large setae on the distal third of the second joint of the mandibular 

 palp. 



The generic characteristics given in the above generic diagnosis are 

 omitted from the specific descriptions given for the new species de- 

 scribed in this paper. 



JANIRALATA DAVISI, new species 



Figures 19, 20 



Holotype. — Male, length 3.5 mm., width at widest part of second 

 peraeon somite 2.0 mm. 



Allotype. — Length 4.7 mm., width 2.4 mm. 



Diagnosis. — Cephalon anterior border with a very short triangulate 

 median lobe and two triangulate anterolateral expansions. Eyes dor- 

 sal, separated from lateral border a distance equal to their widths. 

 Lobate lateral extensions of the first three peraeon somites separated 

 from one another by a narrow V-shaped slit. Pleotelson posterior 

 margin with rounded posterolateral areas and a short, rounded median 

 lobe. Lateral areas of head and body setiferous. Maxilliped with 

 three coupling hooks. First male pleopods with acute laterally ex- 



