114 OKHAMANDAL MARINE ZOOLOGY REPORT 



Porcellana tuberculosa (Milne-Bdwaeds). — Plate, fig. 4. 



Petrolisthes tuberculosa, Milne-Edwards (9). 



A single specimen (female) is doubtfully referred here. The description of 

 this species by Milne-Edwards, in his Histoire Naturelle (which is the only one 

 available), is very short, somewhat indecisive, and no figures are given. Milne- 

 Edwards' description is as follows : — 



" Carapace slightly convex, and pilose on the sides, covered with short 

 filigerous wrinkles, and presenting on the sides some small tubercles. 



" Front deeply divided into three lobes of which the median one is 

 large and round, and is guttered with a profound median furrow, and the 

 lateral ones are straight, obtuse, and directed obliquely outwards. 

 Anterior feet very large. Carpus armed on the anterior edge with 

 several teeth, of which two are pretty large, and present above, three 

 longitudinal series of tubercles, separated by two furrows. Median series 

 most numerous and elevated. Similar tubercles on face of hands. Length 

 16 mm. Habitat, Chih." 



The Kutch specimen agrees with Milne-Edwards' description in the following 

 particulars : — 



(1) The carapace is pilose on the sides and priesents small tubercles 



laterally. 



(2) The front as in foregoing description. 



(3) The carpus of chelipedes has three longitudinal dorsal series of 



tubercles, separated by two furrows. Median series most numerous 

 and elevated. 



(4) The presence of tubercles on the hands. 



It differs in the following particulars : — 



(1) The transverse filigerous wrinkles on the carapace are absent. 



(2) The carpus of the chelipedes only armed with one tooth proximal and 



internal, and another distal and external. 



(3) The chelipedes are not covered with a dense down. 



Assuming the species to be the same, the Kutch specimen possesses the 

 following characteristic points : — 



(1) The palp of the third maxillipede is enormously long and ha'iry. 



(2) The right chelipede is slightly larger than the left. 



(3) The merus of each thoracic leg is characterised by being markedly 



broad. 



