Q20 CRUSTACEA. 



SQUILLA PRASINO-LINEATA. 



Segmentum antennale parce oblongum et antice rotundatum, partim 

 supra carinatum, extus lamina integrd instructum. OcuU grandes, 

 et pedunculi valde compressi. Carapax Q-costatus, angulis anticis 

 breviter acutis. Margines laterales segmentorum thoracic 3 posticorum 

 integri. Digitus clielai maximce 5-spinosus. Abdomen superficie 8-9- 

 costatum, costd mediand partim obsoletd, costis externis totis postice 

 acutis, proximis segmentorum 2di et sequentium postice acutis, 5ti 

 Qtique totis postice acutis. Segmentum caudale medio acute carinatum, 

 superjicie sulcis obsolete ornatd, marginibus prominenter 8-spinosis, 

 inter spinas medianas 4-rotundato-lobatis, inter has et proximas 6-8- 

 acuto-dentatis, dentibus bast valde gibbosis. Appendix caudalis dorso 

 Q-spinosus. 



Antennary segment sparingly oblong and rounded in front, in part 

 carinate above, either side furnished with a lamina having an entire 

 margin. Eyes large and peduncles very broadly compressed. Cara- 

 pax 5-costate, the anterior angles short acute. Lateral margins of 

 three posterior segments of thorax entire. Finger of large chela 5- 

 spinous. Abdomen with eight to nine costae, median costa in part 

 obsolete, outer costfe throughout acute behind, the next acute be- 

 hind in all the segments except the first, and on the fifth and sixth 

 segments all the costas acute behind. Caudal segment acute carinate 

 along middle, surface either side faint sulcate, margin with eight 

 prominent spines, between the two median four rounded lobes, be- 

 tween the median and the next spines, six to eight acute teeth, the 

 teeth being prominently gibbous above at base. Outer margin of 

 caudal appendage nine-spinous (apical spine included). 



Plate 41, fig. 3 a, part of abdomen ; 3 b, eye ; 3 c, part of hand. 

 Rio Janeiro. 



Length, four and a half inches. Colour, green ; of ridges, bluish- 

 green. The middle costa of the carapax is not distinctly furcate near 

 the front, but towards posterior margin opens for a short distance. 



