138 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



telopodite, but this sketch is not useful for comparative purposes. 

 As Atopetholus californicus is the type species of the genus, a good 

 description of it is much to be desired. 



Atopetholus carmelitus Chamberlin 



Atopetholus carmelitus Chamberlin, 1940, p. 81, figs, c-e; 1941a, pp. 30-31, 

 figs. 3, 4 (male holotype in the Chamberlin collection, from the Hastings 

 Reservation, Monterrey Count}', California, collected on February 1, 1940, 

 by J. M. Linsdale). 



The description of this species includes the remark that it is one — 



much resembling A. californicus but differing in the gonopods of the male. An 

 easily noted diflference is in the telopodite of the anterior gonopods; this at the 

 distal end is extended into a curved acute process which Ues in front of the base 

 of the digitiform process whereas in californicus the corresponding process is 

 short and blunt with its distal margin concave. 



Atopetholus fraternus Chamberlin 



Atopetholus fraternus Chamberlin, 1918, p. 169 (male holotype, Mus. Corap. 

 Zool. from Friant, Fresno County, California, collected by R. V. Chamberlin). 



This species has not, apparently, been reported since its description, 

 and the types cannot at present be found in the Museum of Com- 

 parative Zoology. According to the original diagnosis, Atopetholus 

 jraternus is : 



Easily separable from the two preceding species [A. californicus and A. parvus] 

 in the form of the male gonopods. The telopodite of the anterior gonopods is 

 bent convexly forward at the side where it bears at the anterodistal angle a 

 straight, simple, process additional to the caudally directed one arising from the 

 distomesal edge behind, this feature at once separating it from the preceding 

 species. 



Atopetholus michelbacheri (A'^erhoeff), new combination 



Onychelus michelbacheri Verhoeff, 1938, p. 276, figs. 1-3 (male holotype in the 

 Verhoeff collection now in the Zoologische Staatsammlung, Munich, from 

 Walker's Pass, Kern County, California, collected by A. E. Michelbacher). 



Onychelus phanus Chamberlin, 1941b, p. 6, figs. 6, 7 (male holotype in the Cham- 

 berlin collection, from 6 miles west of Freeman, Kern County, California, 

 collected on March 17, 1941, by Stanley and Dorothea Mulaik); 1949, p. 169. 



Orthichelus phanus Chamberlin and Hoffman, 1950, p. 8. 



Onychelus phanus was named insofar as one can deduce from its 

 origmal description chiefly because of its being found in southern 

 California whereas the admittedly very similar 0. michelbacheri 

 was stated to have come from "Nordcalifornien, am Walkerpass." * 



' Actually, however, this information was elaborated on in a footnote stating "liegt der Walkerpass in 

 einer sehr trockenen Gegend und befindct sieh 100 Eng. Meilen nordlich von Los Angeles, etwa 50 Eng. 

 Meilen sUdwestlich vom Death Valley Nat. Monument." These dh-ections clearly refer to the Walker 

 Pass that is located in the northeast corner of Kern County, about 4 or 5 miles west of the town of Freeman. 

 There can be no doubt that the types of Verhoeff and Chamberlin actually came from the same locality and 

 the major diagnostic character of phanus is thereby demolished. 



