182 



The Philippine Journal of Science 



1915 



Table III. — Ratio of carapace-length to abdomen-breadth in two varieties of 



Gonodactylus. 



Variety. 



Mini- 

 mum. 



Mean. 



Maxi- 

 mum. 



G. ehiragra b. b 



G. ehiragra var. platysoma . 



1.16 

 1.01 



1.22 

 1.03 



1.35 

 1.09 



The other characters of the variety are clearly defined in all 

 the specimens in the collection. The raptorial dactylus is short 

 and is not markedly curved at the apex; the lateral teeth of 

 the telson margin are entirely suppressed, and if classified ac- 

 cording to Borradaile's scheme, the specimens would belong to 

 form G, or to a phase intermediate betw^een it and form F. 



The dorsal processes of the ophthalmic somite are consider- 

 ably larger in variety platysoma than in typical G. ehiragra. 

 In the latter the external margins of the processes are parallel,* 

 whereas in the former they are posteriorly divergent. 



The pair of approximate dark spots on the first abdominal 

 somite is distinct in all specimens of the variety and absent in all 

 examples of G. ehiragra, sensu stricto, while in most individuals 

 a black patch is conspicuous on either side of the last thoracic 

 somite and posteriorly on the fifth abdominal somite midway 

 between the lateral margin and the middorsal line. Patches 

 of pigment are also frequently visible in the middle of the sixth 

 and seventh thoracic somites. 



Gonodactylus demani Henderson. 



Gonodactylus demani Kemp, Mem. Ind. Mus. (1913), 4, 164, 198, 

 PI. IX, figs. 108-111. 

 No. 0-1088. Taytay, Palawan, from coral (Cowles and Laki), April 21, 

 1913, 3 c?, 3 ?, 10-19 mm. 



The specimens agree very closely with those which I have 

 examined from the type locality,^ and like them do not possess 

 setag on the inner margin of the uropod. The spinules on the 

 telson are not numerous, but are much sharper than is custom- 

 ary; they occur only at the distal ends of the 3 median ridges 

 and on the swollen bases of the marginal teeth. 



All the specimens show the characteristic transverse rows 

 of black spots (bright blue in life) on the carapace and abdomen. 



Gonodactylus glabrous Brooks. 



Gonodactylus glabrous Kemp, Mem. Ind. Mus. (1913), 4, 167. 



No. 0-133. Bantayan, Cebu Province, 1909, 1 d", 55 mm. No. 0-342. Ban- 

 tayan, Cebu Province, 1909, 3 c?, 1 $, 39-63 mm. No. 0-665. C 32. Port 



' See Kemp (1914), PI. IX, fig. 107. 



Loc. cit., p. 198. 



