The Isopods of Abyssal Depths in the Atlantic Ocean

176 ROBERT J. MENZIES
Figure 59. Notoxenoides vemae, n. sp. A: dorsal view female holotype; B: dorsal view uropod;
C: first peraeopod; D: first antenna; E: mandible; F: maxilliped; G: third peraeopod.
Acanthomunna beddardi, new species
Figure 57
Synonyms: None.
Diagnosis: Acanthomunna with bifurcated frons of
cephalon and three stout spines in a cluster at midline
of dorsum of cephalon. Three transverse rows of stout
spines on dorsum of first three peraeonal somites and
one row on somites 5 and 6. Pleon irregularly spinous.
Propod with seven stout spines along inferior margin.
Measurements: Male holotype length 5.4 mm.,
width pleon 1.5 mm.
Type locality: South Atlantic, L.G.O. Biotrawl
No. 53, type only, cat. no. 1-180.
Distribution: Known only from type locality.
Affinities: This species is distinct in having the
central cluster of three spines in the dorsum of
cephalon.
NOTOXENOIDES, new genus
Type species: Notoxenoides abyssi, new species.
Synonyms: None.
Diagnosis: Munnidae with coxal plates evident in
dorsal view on peraeonal somites 5-7 inclusive.
Uropoda biramous small, leaf-like, peduncle lacking,
insertion lateral. Lateral borders of peraeonal somites
1-7 inclusive produced into spine-like process, dorsum
at midline of each somite with a long spine. Maxillipedal
palp narrower than endite. Mandibular palp
triarticulate; molar expanded and truncated at apex.
Apex of male first pleopods triangulate. Ocular