612 



Carapace, rostrum included, a little louger tliau oue tliird the 

 leugtli of tlie abiloraen. Carapace without auteuual tooth. Rostrum 

 spiniform, as loug as Ist joiut of auteuuular peduucle. Abdouien, 

 except the telson, resembliiig that of CalL joculatrix, as regards 

 the rehitive length of the soraites. 



Telsou quadrate, very slightly louger thau broad, bilobed poste- 

 riorly, with small sharp tooth iu the raedian uotch. Caudal swim- 

 merets louger thau the telsou ; iuuer plate oblong, alniost twice 

 as long as broad, obtuse; exopodite pear-shaped, once and a half 

 as loug as broad, louger thau the iuuer plate, broadly and regu- 

 larly rouuded apically. Additioual row of spiues on the exopodite 

 short, measuring oue tourth of its vvidth, rather niuch divergeut 

 from the apical border. 



Iuuer auteuuae measuriug three fourths of the leugth of the 

 carapace; auteuuular flagella, of which the upper is much thicker 

 thau the other, about as long as their peduucle; 3rd joiut of the 

 latter 3-times as loug as the 2nd. Auteuual peduucle little louger 

 thau the other. 



External maxillipedes similar to those of Callianassa inodesta 

 u. sp., but the merus is broader anteriorly and uuarmed. 



Larger chelipede having the merus armed with a stroug spine 

 at the base of the lower border. Carpus little louger thau wide, 

 shorter thau the palm. Palm louger thau the fiugers, slightly louger 

 thau wide. Lobe ou hinder edge of the propodite of 3rd pair 

 small, obtuse, measuriug '/lo of the leugth of the propodite, that 

 is half as broad as loug. 



Length 15 m.m. 



28. Callianassa placida n. sp. 



Station 58. Anchorage off Seba, Savu. Reef. 



Station 142. Auchonige otf Laiwui. coast of Obi Major. Reef. 



Closely related to Call. mucrouata Strahl. 



Carapace anteriorly trispiuose, as iu ('all. tridentatu Mart., meilian 

 spine exteuding a little beyoud the miildle of Ist joiut of the 

 auteuuular peduucle, lateral spiues measuriug two filths of the 



