1913-] S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 149 



basal segment of outer uropod articulating terminally with ultimate 

 segment [mandibular palp two-segmented]. Group III. 

 I. Large spines on last abdominal somite and telson with a soft fleshy pro- 

 cess protruding from apex . . . . . . . . guerini, p. 192. 



II. Darge spines on last abdominal somite and telson, if present, without 

 fleshy process at apex. 

 A. Distal margin of telson divided into right and left halves by a long and 

 very narrow median fissure with its edges partly in contact with one 

 another. 



1. Three round or oval bosses in centre of telson, external boss on each 



side not reaching distal margin. 



a. External boss on each side reaching only to middle of telson. 

 i. Median portion of fifth abdominal somite entirely smooth. 



• u. Rostrum sharply trispinous ; dorsal processes of ophthalmic 



somite produced, with acute antero-lateral corners . . pulchellus, p. 177. 



ß. Antero-lateral angles of rostrum acute but not spinous ; dorsal 

 processes of ophthalmic somite not produced antero-late- 

 rally . . . . . . . . . . nefandus, p. 179. 



ii. Median portion of fifth abdominal somite longitudinally wrinkled, 

 a. Rostrum sharply trispinous ; external bosses of telson oval 



in outline .. .. .. .. trispinosus, p. 180. 



ß. Antero-lateral angles of rostrum acute but not spinous ; 



external bosses of telson strictly circular in outline . . tnbevosus, p. 181. 



b. External boss on each side reaching well beyond middle of telson, but 



not extending to distal margin, 

 i. Median portion of fifth abdominal somite smooth ; distal margin 

 of telson with three large teeth on either side of median fissure. 

 a. Dorsal surface of telson, between bosses, smooth . . glaber, p. 182. 



ß. Dorsal surface of telson, between bosses, covered with well- 

 marked irregular depressions . . . . . . tanensis, p. 183. 



ii. Median portion of fifth abdominal somite furrowed; distal margin 



of telson with four large teeth on either side of median fissure . . stoliiirns, p. 184. 



2. Three bosses in centre of telson, external boss on each side termina- 



ting in a point on distal margin. 



a. Fifth abdominal somite smooth mid-dorsally ; sixth with six round- 



ed bosses; bosses of telson smooth and entire .. .. ectypus, p. 185. 



b. Fifth and sixth abdominal somites finely grooved ; dorsal bosses of 



telson incised at margins by fine grooves runnings towards summit 



of each boss .. .. .. ,. •• glyptocercus, p. 186. 



B. Distal margin of telson divided into right and left halves by a large, 

 wide and deep excavation. 



1. No spines or spinules on dorsal surface of telson. 



a. Distal margin of telson with tvv^ large teeth on either side of median 



excavation . . . '. . . . . • • excavatus, p. 187. 



b. Distal margin of telson with three large and blunt teeth on either 



side of median excavation . . . . • • • • [fohni, p. 189.] 



2. Dorsal surface of last abdominal somite and telson beset with spines 



or spinules. 

 a. With short spinules. 



i. Telson with three pyriform bosses ; spinules straight •• brooksi, p. 189. 



