I913.] S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 21 



three abdominal somites; no marked 

 secondary sexual distinctions . . lata. p. 37. 



b. Submedian carinae present on all abdom- 

 inal somites; telson of adult male differ- 

 ing greatly from that of female . . gilesi, p. 39. 



2. Median carina of carapace absent; mandibular 



palp absent; raptorial dactylus with seven to 

 nine (rarely six) teeth' ; lateral processes of 

 sixth and seventh thoracic somites spinous 

 posteriorly .. .. .. armata, p. 41. 



3. Median carina of carapace present ; mandibular 



palp absent; raptorial dactylus with five 

 teeth ' ; lateral processes of sixth and seventh 

 thoracic somites posteriorly rounded. 



a. Lateral process of fifth thoracic somite with 



a large black dorsal spot . . . . scorpio, p. 42. 



b. Lateral process of fifth thoracic somite 



without a black spot . . . . do. var. immaculata, p. 45. 



B. Median carina of carapace sharply defined and an- 

 teriorly bifurcated [raptorial dactylus with six 

 teeth 1 ; lateral processes of sixth and seventh 

 thoracic somites sharply acute posteriorly] . . mantoidea, p. 45. 



77. Raptorial dactylus with only four teeth ' ; submedian 

 and intermediate marginal teeth of telson very long 

 [mandibular palp absent]. 



A. Median and lateral carinae sharp and distinct in an- 



terior half of carapace ; lateral process of fifth 



thoracic somite directed straightly outwards . . leptosquilla , p. 46. 



B. Median and lateral carinae entirely absent from 



anterior half of carapace; lateral process of fifth 

 thoracic somite trending obliquely forwards . . tenuispinis, p. 48. 



B. Lateral margin of fifth thoracic somite, seen in dorsal view, composed 

 of two distinct processes, usually of a more or less antrorse ante- 

 rior spine and a rounded posterior lobe, rarely of two sharp spines. 

 I. First five abdominal somites each with eight longitudinal carinae. 



A. Lateral margin of sixth thoracic somite not bilobed ; mandi- 



bular palp absent. 



I. Anterior bifurcation of median carinae of carapace sharp 



and distinct ; raptorial dactylus with six teeth l . . laevis, p. 49. 



II. Anterior bifurcation of median carinae of carapace absent ; 



raptorial dactylus with five teeth ' . . . . hieroglyphica, p. 51. 



B. Lateral margin of sixth thoracic somite bilobed, anterior lobe 



rarely {i.e. in 5. boops) small and inconspicuous; mandi- 

 bular palp present. 



/. Raptorial dactylus with only five or six teeth. l 

 ■ A. Raptorial dactylus with only five teeth. 1 



1. Rostrum with median carina; breadth of cornea 

 more than one-third of median length of cara- 



1 Including the terminal tooth. 



