2234 CRUSTACEA. 



There were two large oval glandular masses in the anterior part of 

 the cephalothorax, situated as indicated in the figure. 



The figure of the posterior antennae (fig. b) was drawn from the 

 specimen obtained near longitude 165°, in 1841, while the other 

 figures are from that of 1839. 



Genus SAPPHIKINA, Tliomjpson. 



Corpus 2>lus minusve depressmn, f route arcuato. Conspicilla in frontem 

 vel superficiem capitis inferiorem insita. Sexus quoad antennas pos- 

 ticas stylosque caudales similes, abdominem pedesque anticos dissimiles. 

 Maris: — Abdomen thorace subito non angustius, i-5-articulatum, 

 appendicibus basalibus car ens; pedes antici digito elongato instructi. 

 Feminae : — Abdomen thorace subito angustius, 5-§-artimlatum, appen- 

 dices breves basales gerens; pedes antici digito brevi. [Mares swpe 

 loeti opalini aut fulgidb metallini; feminse scepius incoloratm et plus 

 minusve pellucidce, inter dam opacce et indigotico3.~] 



Body more or less depressed, front arcuate. Conspicilla either on the 

 front margin or under surface of the head. Sexes alike in the pos- 

 terior antennae and caudal stylets, but differing in the abdomen and 

 anterior feet. Male: — Abdomen not abruptly narrower than 

 thorax, four or five-jointed, without basal appendages ; anterior feet 

 with a long finger. Female: — Abdomen abruptly narrower than 

 thorax, five- or six-jointed, having basal appendages; anterior feet 

 with a short finger. [Males often beautifully opaline or brilliant 

 with metallic tints ; females usually colourless and more or less 

 pellucid, or else opaque and indigo-blue in colour.] 



The body in the Sapphirinae varies from a long narrow form, three 

 or four times as long as broad, to an ovate shape. The cephalothorax 

 is much longer than the abdomen, and consists of either four or five seg- 

 ments; four is the usual number, and when five, the first or added 

 articulation is often faint. The anterior segment is quite large ; the 

 others are short and transverse. When there are five segments each 

 of the last four bears a pair of natatories. These segments vary in 

 different species in their relative dimensions, and in the lateral margins 

 and angles. 



