1248 



CRUSTACEA. 



spicilla fronte imita. Abdomen 5-arttcidatum, segmento primo fere 

 obsolete aut tecto, secundo latere obtuso, tertio quartoque lunatis. 



Finger of posterior antennae slender, finger three-fourths the second 

 joint, claw half the finger in length. Caudal lamellae approximate, 

 subovate, oblong, length exceeding twice the breadth, setae very 

 short (obsolescent). Female: — Body much convex. Cephalotho- 

 rax oval, five-jointed, anterior segment scarcely shorter than the 

 breadth, posterior segments laterally obtuse, diminishing in breadth 

 to the last. Conspicilla of moderate size, situated on the front. 

 Abdomen five-jointed, breadth sparingly less than the length, first 

 segment very short, second laterally obtuse, third and fourth lunate, 

 acute. 



Plate 87, fig. 11 a, animal, enlarged; b, under view of anterior seg- 

 ment, showing how far the upper shell is reflexed ; c, posterior an- 

 tenna. 



Pacific Ocean, in the Paumotu Archipelago, near Honden Island, 

 latitude 15° south, longitude 138° 45' west, August 19, 1839. 



Length, about one-sixteenth of an inch. Translucent. Colour, 

 brownish by transmitted light, and bright blue by reflected light. 



The last four segments of the cephalothorax rather rapidly and 

 regularly diminish in breadth, so that the last of the four is about 

 half as broad as the first. The first of the abdominal segments bears 

 a pair of short appendages. The second is much larger, but it is nar- 

 rower than the third and a little longer; it is not acute laterally. 

 The caudal lamellae are as long as the last three abdominal segments. 

 The setae are not over a fourth the length of a lamella. The abdomen 

 is very short for its breadth. 



Sapphirina indigotica. 



Digitus antennarum posticarum tenuis, fere articuli 2di longitudine, et 

 unguiculo fere dimidii digiti. Larnellce caudales subovatce, apice in- 

 ferno vix prominulo, setis quatuor, duabus apicalibus, aliis externw, 

 totis dirnidio lamellae vix brevioribus. Feminae : — Corpus valde con- 



