484 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



E-166, Bogombogo Island, ocean side, algal clumps in 1 foot of water, July 2. 



cf. Maera inaequipes serrata, 1 

 E-169, Bogombogo Island, ocean side, intertidal sand, July 2. 



Le7n6os species (cf. francanni), 1 

 E-17I, Bogombogo Island, lagoon side, algae attached to old coral heads, July 2. 



1 Ampithoe raviondi, 14; Cymndusa filosa, 4; Hyale honoluhiensis, 4 

 E-172, Bogombogo Island, lagoon side, old coral head washings and coral rock, 

 July 2. 



Ampithoe ramondi, 5; Cymadusa filosa, 8; Lcmbos species (cf. francanni) , 3 

 E-182, Parry Island, lagoon opposite EMBL, coral washings, July 7. 



Synopia variabilis, 1 

 E-184, Parry Island, lagoon opposite EMBL, old coral washings from 5 feet of 

 water, July 8. 



1 Ampithoe ramondi, 4; Elasjyiopus pseudaffinis, 5 



Family Lysianassidae 

 Azotostoma, new genus 



Diagnosis: Mouthparts styliform, formed into a large ventral 

 conical bundle; basal article of mandibular palp nearly as long as 

 second article; lower lip with well defined mandibular processes, 

 inner lobes absent; maxilla 1 with projecting but blunt inner plate, 

 fringed apically with fine hairs, outer plate with about 7 or 8 distal 

 teeth, palp apparently biarticulate, clavo-falciform, exceeding outer 

 plate; maxUla 2 with both pairs together enclosing an imaginary 

 hemispherical channel, inner plate medially expanded, hairy, outer 

 plate much more slender; maxilliped with palp projecting only slightly 

 beyond the large outer plate, inner plates styliform, reaching end of 

 outer plate, palp with 4 articles, the second produced apically so 

 that the third article is attached proximal to its apex, article 4 claw- 

 shaped; gnathopod 1 simple, not subchelate, the sixth and seventh 

 articles quite elongated and slender, article 7 serrate along its inner 

 edge; gnathopod 2 minutely subchelate; coxae closely packed but 

 first not strongly concealed by second; uropod 3 biramous; telson 

 entire. 



Type species: Azotostoma fusta, new species. 



Relationship: This genus belongs with the Trischizostoma-Acido- 

 stoma group of lysianassids bearing styliform mouthparts formed 

 into a concial bundle. The genus differs from Stomacontion and 

 Acontiosfoma by the biramous third uropods; from Phoxosfoma by 

 the well-developed fourth article of the maxillipedal palp; from 

 Trischizo stoma by the simple, styliform first gnathopod; from Acido- 

 stoma by the large palp of maxilla 1 and from Shackletonia, to which 

 it bears closest relationship, by the uncleft telson. The genus assorts 

 so niany unusual features that it is not closely related to any other 

 genus of lysianassid mentioned and is quite remarkable in the second 

 maxillae and in the produced second article of the maxUlipedal palp. 



