part 1 garth: pacific oxyrhyxcha 101 



hatching could be seen through the transparent egg membranes of a 

 female from Costa Rica taken March 26. 



Remarks: In view of the fact that increasingly fewer species of 

 Brachyura are found to be common to the Atlantic and Pacific oceans as 

 time goes on. the writer departs from the synonymy nf ? zthbun (1925) 

 and returns to the concept of Stimpson's Inachoides laevis as a purely 

 Pacific species, unencumbered by the addition of A. Mi. re Ed wank s /. 

 forceps and I. obtusus and of Ra tli b un 's /. intermedins. These la::tr 

 may well represent named varieties of a single Atlantic species standing 

 in an analogous relationship to /. laevis, which has similar, if u nn a m ed, 

 varieties of its own. 



Since the name Inachoides laevis Stimpson belongs a priori to the 

 species as represented in the Pacific, the writer does not consider it 

 incumbent upon him to discuss in this, a Pacific paper, the status of the 

 Atlantic forms grouped by Rathbun under the same name. In a forth- 

 coming report dealing with Hancock Caribbean material the question 

 will be reopened and at that time supporting evidence for the specific 

 identity of the Atlantic analogue in the form of pleopod studies will be 

 introduced. 



As contrasted with the gregariousness of Inachoides microrhynchus, 

 which was dredged by the hundreds in the bays of Peru. I. laevis occurs 

 sparingly but over a much wider territory. The largest number o: 

 s rations at which it was obtained was in Costa Rica, where conditions 

 for its existence seem highly favorable : the greatest number of individ-- 1 . s 

 from any one dredge haul was 13 specimens taken at Tenacatita Bay. 

 Mexico. 



Genus PODO CHELA Stimpson 



Pod* chela Stimpson. 1860b. p. 19-. Rathbun. 1925. ?. 31. 



Podonema Stdmpsom 1860b, p. l c ": type: P. riisei (Stimpson), 1860 



= Podochela riisei Stimpson, by subsequent designation of Mirrs 



(1879c, p. 644). 

 Driope Desbonne. 1S67. p. 2 : :y?e: D. falcipoda Desbonne. 1867 = 



Podochela riisei Stimpson, by monotypy. 

 Acrorhynchus A. Milne Edwards, '. 879, p. 189; type: A. depresses A. 



Milne Edwari? 1879 = Podochela arossipes Stimpson, by original 



designation. 

 Jnisonoius A. Milne Edwards. IST 2 . p. 195: tyre: J. uuviimUis A. 



Milne Edwards. 1S79 = Podochela curvirosiris (A. Milne Ed- 

 wards), by money ry. 



