1244 



CRUSTACEA. 



Pacific, latitude 18° 10' south, longitude 125° 30' west, August 8, 

 1839. 



Length, one-sixteenth of an inch. Colours by reflected light, richly 

 variegated and changeable, with an extremely brilliant lustre, like 

 tinsel. 



The body gradually tapers from the second segment backward. 

 The first segment is about as long as broad. The conspicilla on 

 the front are very large. The third and fourth joints of the posterior 

 antennae are together about three-fifths the second, and very slender. 



Sapphirina islequalis. 



Digitus antennarum posticarum articulo 2do non brevior, tenuis, ungui- 

 ado brevi. Lamellae muddles oblcmgce, subovatce, a/pice interno 

 promimdo, subacuto, setis quatuor, dimidio lamellae non longioribus. 

 Feminae : — Corpus elongate^ ovatum, segmentis cephalotJwracis tribus 

 posticis dissimilibus, segments ultimo breviore et latere acuto, penultimo 

 obtuso. Conspicilla / route insita. Abdomen Q-articulatum, segmento 

 prime fere obsoleto out tecto, secundo utrinque posticd acuto. 



Finger of posterior antennae not shorter than the second joint, 

 slender, claw short. Caudal lamellae oblong, subovate, twice as 

 long as broad, inner apex a little prominent, subacute, setae four, 

 not more than half as long as lamella. Female : — Body long ovate, 

 cephalothorax with the last three segments dissimilar, antepenult 

 segment having the posterior angles obtuse, penult laterally sub- 

 truncate, obtuse, last lunate, acute. Conspicilla small, situated on 

 the front. Abdomen six-jointed, first segment nearly concealed, 

 second having the posterior angles acute. 



Plate 87, fig. 7 a, animal, enlarged; b, posterior antennae. 



Pacific, latitude 43° south, longitude 78° 45' west, April 3, 1839. 



Length, one-twelfth of an inch. Colour, a little reddish. Anterior 

 segment of the cephalothorax has an imperfect articulation across, and 

 the anterior part is nearly as long as broad, and shaped like the letter 



