OF ARTS AND SCIENCES. 51 



postice rotundata. Digitus pedis mandibularis ad basin crassus, sensirn 

 attenuatus. Antennae anticse ad apicem 4- 5-setigerae, setis antenna 

 non longioribus. — Luteola. 



Long. yV'. — Hub. in mari " Sulu." 



2. Cypridina PUNCTATA. — Compresso-ovoidea, punctata ; latere vi- 

 sa, late ovalis, postice gibbosa, infra supraque asque arcuata, antice bre- 

 viter rostrata, fronte prominula, rostro gracili, acuminato ; superne visa, 

 angusto-elliptica, extra mitatibus rotundatis. Spinulse caudales decern. 



Hab. in mari " Sulu." 



3. Cypridina olivacea. — Subovoidea ; latere visa, oblongo-subel- 

 liptica, dorsum parce arcuata, postice truncata et sparsim ciliata, antice 

 rostrata, rostro ad apicem rectangulato, fronte prominente ; superne vi- 

 sa, longe ovata, antice obtusa, postice subtruncata. Antennae antic<E 

 setis corpore longioribus ad apicem instructae. Spinuls caudales oclo. 

 — Olivacea. 



Long. yV'. — Hab. in mari " Sulu." 



4. Cypridina gibbosa. — Latere visa, angusto-subovata, infra su- 

 praque arcuata, postice valde gibbosa, antice breviter rostrata, rostro 

 acuto, fronte prominula. Antennae anticae tribus setis longis aliisque 

 brevioribus ad apicem instructse, setis antenna paulo brevioribus. Spi- 

 nulse caudales sexdecim. — Fere incolorata. Phosphorescens. 



Long.^^". — Hab. in mari Pacifico, lat, aust. 15° 20', long. occ. 

 148°. — Lect. die 10 Sept., 1839. 



5. Cypridina Formosa. — Compresso-ovoidea ; latere visa, breviter 

 elliptica, infra supraque valde arcuata, margine postico interrupto, non 

 gibboso ; superne visa, angusto-elliptica, extremitatibus obtusis. An- 

 tennas anticae longe setigerae, setis antenna parce longioribus. Pedes 

 mandibulares digitum tenues. Spinulse caudales decern. — Pallide pur- 

 purea et maculis leete purpureis notata. 



Long. yV'. — Hab. in mari Pacifico, prope insulam " Upolu." — 

 Lect. die 26 Feb., 1841. 



Genus III. CONCH^CIA. {Dana.) 



Testa interdum breviter rostrata, corpus omnino tegens, fronte aperla. 

 Oculi simplices. Antennce anticce 3-4-articulat8e, apicem longe se- 

 tigerae. Spiculum inter antennas sarcosum, simplex, exsertiJe. Anten- 

 nce posticce 5 - 7-articulatEe, articulis brevissimis longe setigeris con- 

 fectae, ramo altero brevi. Pedes mandibulares ferme 5-articuIati, 



