SOMETHING ABOUT SUB-GENERA 129 



the left side, of the crab. The parasite referred to would 

 no doubt now stand under some other generic name, 



Myra, Leach, 1817, is another genus of common occur- 

 rence throughout the Indo-Pacific region, of which the 

 species Myra fug ax (Fabricius) has been frequently re- 

 named. It is remarkable for the great length which the 

 slender chelipeds sometimes attain, and which have caused 

 the Japanese to call it the long-handed crab. 



Ubalia, Ijeach, 1817, has an extremely extended range, 

 and includes numerous species, among which several occur 

 in European seas, and four of them in the waters of Great 

 Britain. These four are Ebalia tuber osa (Pennant), Ebalia 

 tumefacta (Montagu), Ebalia Cranchii, Leach, and Ebalia 

 71UX, Norman. It is curious that Bell, in his ' History of 

 British Stalk-eyed Crustacea,' should have thought it right 

 to follow Leach in calling the first two of these respectively 

 Ebalia Pennantii and Ebalia Brijerii, while he relegated 

 the earlier names to the synonymy. The resemblance 

 which these little creatures, with their legs all tucked up, 

 assume to a rugged little fragment of stone has been 

 already mentioned. Comparing Ebalia with a genus 

 P/iZ//a3iVt instituted by Bell in 1855, Mr. Miers says : — ' The 

 genera Ebalia and Phlyxia are now connected by so many 

 intermediate species, that not one of the distinctive cha- 

 racters mentioned by Bell can be regarded as constant. 

 I propose, therefore, to unite these genera, but to separate 

 the species under two primary sections or sub-genera (for 

 which the names Ebalia and Phlyxia may conveniently be 

 retained) as follows : — 



' I. Front slightly concave or truncated, not quadri- 

 dentated (Ebalia).' This is followed by a list of twenty- 

 six species. 



' II. Front with four distinct (usually tuberculiform) 

 lobes or teeth, including the tooth at the interior angle of 

 the orbit (Phlyxia).' This is followed by a list of seven 

 species, in regard to which it is pointed out that all are 

 restricted to Australia. The convenience of having a 

 generic name to indicate so small a mark of separation 

 may well be questioned, but the inconvenience of the sub- 



