176 Annals Entomological Society of America [Vol. II, 



mens agree closely in mouth parts and other characters with 

 some from Denmark communicated by Dr. Meinert. Those 

 examined from Provo have either 39 or 41 jxairs of legs. 



.2. Pectiniunguis montereus Chamberlin. 



1904. Pectiniunguis montereus Chamberlin, Proc. Acad. Sci. Phil., p. 653. 



Additional specimens, partly grown, from the Monterey Bay 

 region, agreeing essentially with the types. 



3. Pectiniunguis heathii sp. nov. 



Ultimate article of antennae in length subequal to the two preced- 

 ing taken together; a little excavated on exterior side near apex. 



Cephalic plate longer than wide (as 4.3:3.8); sides widely curved, 

 but little converging caudad; anterior margin subtriangular; posterior 

 margin truncate or weakly curved caudad. Frontal plate not dis- 

 crete. Prebasal plate not exposed. Basal plate wider than loni,' in 

 ratio 2:1. 



Claws of the prehensorial feet when closed attaining front margin 

 of head or nearly so; claws and other joints wholly unarmed; prester- 

 num emarginate mesally in front, the shoes of the emargination meet- 

 ing at an obtuse angle; wdder than long (4.6:3). 



Anterior praescuta short, the median and posterior of moderate 

 length 



Each of the first ten ventral scuta with a posterior median process 

 fitting into a corresponding pit or depression of the succeeding plate. 

 Ventral pores present on anterior segments in a circular or oval area. 

 Ventral plates of middle region with a longitudinal median sulcus. 



Spiracles all circular, the anterior ones small, the posterior ones 

 minute. 



Ultimate ])air of legs each armed with a claw as in montereus, the 

 claw stout. 



Last ventral plate wide, narrowed caudad, each side crenately 

 excised near its middle; posterior margin widely weakly incurved. 



Pleural pores two on each side, moderate in size and adjacent to the 

 ventral plate. 



Anal pores not detected. 



Pairs of legs in female type 4"). 



Length 22 mm. 



Locality — Near Cypress Point, Monterey Coimty, Cal. 

 Found in an Indian shell mound some distance below surface. 

 A female dug u|) at Los Angeles and otherwise agreeing with the 

 type has 53 ]jairs of legs. 



This species is most closely related to the Brazilian P. plusi- 

 cocitus Attems. It is dedicated to Prof. Harold Heath of Stan- 

 ford Unix'ersitv. 



