4 PROCEEDIlSrGS OF THE NATIONAL MUSEUM vol. 81 



Antennae digitiform. Eyes somewhat elongated, near lateral mar- 

 gins of head, nearer anterior than posterior margin. A forked 

 chitinous thickening branches above the mouth and bifurcates on 

 each cheek. Seven thoracic segments and seven legs are apparent on 

 the side of the body opposite the marsupium; the other side 

 bears only the first leg, and the somites are not defined. The 

 thoracic legs are all subchelate. Ovarian bosses are present on the 

 marsupial side of the thorax. The abdomen is composed of four 

 segments. On the side away from the marsupium the first three seg- 

 ments each bear an appendage, which ends in two flat, spatulate 

 rami; the last somite bears tAvo such appendages; in other words, 

 there is a fringe of five flattened, biramous appendages along the 

 lateral and posterior border of the abdomen. There are five pairs 

 of incubatory lamellae, which inclose a more or less spherical mass of 

 eggs ; those on the side of the body without legs are very small. 



Three young females were found attached to the abdomens of al- 

 pheids among the swimmerets. These measured 0.7, 1.1, and 1.3 

 mm. in length, respectively. They (fig. 18) have seven pairs of sub- 

 chelate legs on the thorax, and a tapering, 6-segmented abdomen, 

 which is without appendages. The first segment of the abdomen is 

 much shorter than those following. The head is flat and resembles 

 that of the adult. 



Male : Narrow, 1.8 mm. long, 0.5 mm. wide. Head rounded an- 

 teriorly, straight across the posterior margin. Eyes elongated, near 

 posterolateral angles. Antennae tapering, first pair less than half 

 as long as second, 3-segmented; second pair 7-segmented. Thorax 

 7-segmented, with seven pairs of subchelate appendages. Abdomen 

 unsegmented, without appendages; lateral margins somewhat vari- 

 able, often with a deep notch near the base and another slight in- 

 dentation nearer the tip; posterior end, always rounded and 

 emarginate. 



The species is named for Dr. Waldo Schmitt, curator of marine 

 invertebrates. United States National Museum. 



Type.—V.S.l^M. No. 65147. 



Genus STEGIAS Richardson 



STEGIAS CLIBANARII Richardson 



Figures 22-26 

 Steffias clihanarii Richardson, Proc. U. S. Nat Mus., vol. 27. pp. 59-60, 1904. 



Through the kindness of Prof. B. W. Kunkel, three specimens of 

 this species, all now in the United States National Museum, were 

 obtained from the branchial cavity of CUbanarius tincolor (Gibbes). 

 The two females differ in some respects from Richardson's de- 

 scription, which was made from one very old specimen, but the 

 abdomens and their appendages agree quite well with her descrip- 



