92 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



the inner surface of the second segment of the exopodite of the first 

 thoracic leg in L. jallolunulus are also found in Pseudoanuretes chae- 

 todontis Yamaguti, 1936a, while the ramified spine on the first seg- 

 ment of the exopodite of the second thoracic leg is similar to the 

 condition of this spine in Anuretes serratus Shiino, 1954a. 



The name "falloluniiliis" is derived from the Latin terms "fallo" 

 (deceive) and "lunula" (small moon) and refers to the natm-e of the 

 lunule-lilce structm'e on the female. 



Midias Wilson, 1911b 



Diagnosis. — Cephalothorax ovoid, consisting of cephalon and first 

 4 thoracic segments. Frontal region distinct, with lunules. Free 

 fom-th pedigerous segment wider than long, tergal region heavily 

 sclerotized (as is most of the dorsal body surface), with flapiike 

 lateral extensions, segment without alae or separate plates in either 

 sex. Genital segment with short, heavily sclerotized, spinelike fifth 

 leg projections on posterior lateral siu-face. Abdomen of female 

 2-segmented, of male 1- or 2-segmented, basal segment of female 

 with lateral lobes. Antennule 2-segmented; antenna 3-segmented, 

 with clawlike terminal process, male with adhesion surfaces on first 

 and second segments. Mandible rodlike, distal region curved inward, 

 slightly flattened, with 12 denticulations along distal inner surface. 

 Postantennal process consisting of spinelike projection and 3 nod- 

 ules, each bearing several hau'like processes; postoral process spine- 

 like, either bifid or simple, male with adhesion siu-face on distal region 

 of process. Maxillule nodular, with setules; maxilla 2-segmented, 

 tipped by 2 saber-shaped processes. Maxilliped 2-segmented, with 

 clawlike terminal process; sternal furca well developed. Thoracic 

 legs I-III biramous although endopodite of first leg reduced, foiu-th 

 thoracic leg uniramous. 



Remarks. — Two species have been described in this genus and 

 are compared in the discussion section following the description of 

 M. lohodes. 



Wilson (1911b, p. 628) placed M. lohodes in the subfamily Eury- 

 phorinae (now recognized as a distinct family) because, "among 

 general characters," of the large size, "the possession of rudimentary 

 dorsal plates on the fourth" pedigerous segment, "a strongly inflated 

 genital segment ... an abdomen with lateral lobes on the basal 

 joint and posterior lobes on the terminal joint," the possession of a 

 2-segmented endopodite on the first thoracic leg, and the presence 

 of 3 segments in each of the rami of the third thoracic legs. Yamaguti 

 (1963) accepts this placement and includes the genus in the Eury- 



