190 Notes on North American Crustacea. 



It approaches nearest to M. hispidus, with which it agrees 

 nearly in the front, orbits, antennae, etc., but it is easily recog- 

 nised by the granulated tubercles of the carapax. 



It inhabits the shores of Cape St. Lucas, L. California, where 

 it is very abundant, according to Mr. Xantus. 



Teleophrys. 



TeleojyJirrjs Stimpson, Silliman's Am. Jour. Sci. 2iid ser,, xxix. p. 133. 



This genus is allied to Mitlirax proper, but is distinguished 

 by the character of its orbits, which have the superior and ex- 

 terior margins entire, and not armed with tubercles or spines. 

 There is sometimes an indication of a superior fissure entirely 

 closed up, but there is no trace of an exterior one. The basal 

 joint of the external antennae is rather narrow for the group to 

 which this genus belongs, tapering anteriorly, armed with a 

 slight tooth at the antero-exterior angle, and another still 

 smaller at the middle of the outer margin. Meros-joint of the 

 external maxillipeds broader than the ischium, and three- 

 fourths as long, and notched at the internal angle, for the recep- 

 tion of the palpus. 



Teleophrys cri$$tiilipes, nov. sp. 



PI. II. fig. 2. 



Carapax triangular in front, laterally and posteriorly rounded. Gas- 

 tric and cardiac regions moderately protuberant ; the former crossed at 

 the middle by a transverse row of four small tubercles. Branchial 

 region deeply separated from the hepatic, sparsely tuberculated, with 

 one high tubercle near the lateral extremity, and four short spines, curv- 

 ing forward, on the lateral margin. Front narrow ; rostrum very short, 

 shghtly bifid. External antennae two-thirds as long as the carapax. 

 -Feet rather broad, naked above, and covered with lamelliform spines or 

 short, leaf-life crests, often somewhat imbricated. Chelipeds with the 



