DIOGENES OF SINGAPORE AND THE MALAY PENINSULA 



35 



Fig. 1 Diogenes inglei sp. nov., holotype ovigerous 9 SL = 1 .46 mm. 

 BMNH 1905.10.21.33; a. shield and cephalic appendages; b. anterior 

 lobe of sternite of 3rd pereopods; c. I st maxilliped; d. 6th abdominal 

 tergite, protopods of uropods and telson; e. telson. 



weakly spinulose. Dorsal margins of branchiostegites with 3-6 

 small spines or spinules. Ocular peduncles swollen proximally and 

 narrowing distally to tapering corneae; overreached by antennular 

 peduncles. Ocular acicles with 1-3 strong and 1 or more smaller 

 spines. Intercalary rostriform process slender, reaching beyond 

 proximal half of acicle but not to tip of inner-most acicular spines; no 

 ventral spine. Antennal peduncles reaching to or slightly beyond 

 distal margins of corneae. Antennal acicle simple, with bifid termi- 

 nal spine and 2 widely-spaced spines on mesial margins. Antennal 

 acicles with pair of long pinnate setae on each article. First maxilliped 

 (Fig. lc) without exopodal flagellum. 



Left cheliped (Figs 2a, 10a) with row of prominent spines on 

 upper margins of dactyl, palm and carpus, and lower margins of 

 palm and fixed finger; outer surface of dactyl with short row of 

 spines near upper margin; palm and fixed finger with scattered small 

 spines or tubercles, irregular row of larger spines near upper margin 

 of palm. Right cheliped (Fig. 2b) with row of 3 spines adjacent to 

 upper margin of palm; 3 strong spines on upper margin of carpus. 

 Carpi of ambulatory legs (Figs 2c, d) each with dorsodistal spine and 

 1 additional spine on dorsal surface proximally on second pereopods. 

 Tergite of sixth abdominal somite with lateral and terminal spines 

 marginally. 



Telson (Figs Id, e) with median cleft practically obsolete; termi- 

 nal margin with row of several large and few smaller spines, extending 

 onto lateral margins. 



Fig. 2 Diogenes inglei sp. nov., holotype ovigerous 9 SL = 1 .46 mm, 

 BMNH 1905.10.21.33; a. left chela; b. right chela; c. right 2nd 

 pereopod; d. left 3rd pereopod. 



Description. Shield (Fig. 1 a) longer than broad; anterior margin 

 between rostrum and lateral projections weakly concave; anterola- 

 teral margins with marginal or submarginal row of small blunt or 

 acute spinules; anterolateral angle unarmed; posterior margin trun- 

 cate; dorsal surface with scattered spinules anteriorly and laterally. 

 Rostrum obsolete. Lateral projections obtusely triangular, with promi- 

 nent marginal or submarginal spine. Dorsal margin of branchiostegite 

 with 3-6 sometimes widely-spaced small spines or minute spinules, 

 1 spine on anterior margin. 



Ocular peduncles moderately long, approximately 0.80 length of 

 shield; swollen proximally and narrowing distally to somewhat 

 reduced and distally tapered corneae, dorsomesial surface with row 

 of long fine setae in proximal half. Ocular acicles almost 

 subtriangular, anterior margin with 1-3 strong and 1 or more smaller 

 spines; separated basally by width of intercalary process. Latter 

 moderately well developed, somewhat depressed, reaching beyond 

 proximal half of ocular acicles, with terminal spinule; no ventral 

 spine. 



Antennular peduncles, when fully extended, overreaching cor- 

 neae by approximately 0.33-0.50 length of ultimate segment. 

 Ultimate segment with 1 or 2 long setae on dorsodistal margin. 

 Penultimate segment with few scattered setae. First segment fre- 

 quently with small spine on ventrodistal margin. 



Antennal peduncles reaching to, or slightly overreaching distal 

 margin of corneae; with supernumerary segmentation. Fifth seg- 

 ment with 3 or 4 pairs of long setae on ventral margin distally. Fourth 

 and third segments with few short setae. Second segment with 



