28 



UN THE CIIILOPODA OF NORTH AMERICA. 









7W/,/.' showing 



■nritt/itms in specific characters. 











Spines on inner side 



Spines on lower surface of 





Spines on 



anal ap- 



Number ol 

 specimen. 



Labial teeth. 



of basal joint of last 

 pair of legs. 



basal joint of last pair of 

 legs. 



Spines on angu- 

 lar process. 



pendages. 



Apical. 



Marginal. 



39 



4 



4 



2 2 3 2 



2 



4 



2 



4 



5 



2 2 2 4 



Q 



4 



2 







[4 



6 



. 4 4 5 4 



5 



5 



2 







4 



6 



3 3 4 3 



5 



3 



1 



309 





4 



4 



• 2 3 5 3 



2 



4 



1 





4 



4 



2 3 5 3 



2 



5 



3 







4 



6 



3 3 15 3 



4 



5 



3 







14 



5 



13 2 3 3 



4 



5 



3 





'4 



6 



3 2 3 3 



3 



6 



1 





4 



6 



2 2 3 4 



2 



4 



2 





4 



5 



2 3 4 3 



3 



3 



1 





4 



5 



2 3 3 3 



3 



4 



1 





4 



5 



12 4 3 



3 



4 



1 





4 



5 



2 2 3 3 



3 



3 



2 



39 



1 



309 



3 



361 



4 



California. 

 California. 



Unc. 



3 J 



-2 2 



-4i 



S. btspinipes, n. sp. — S. olivacea, polita; eapite olivaceo-castaneo, cum mandibulis magnis et labio, minute 

 punetato ; segmento cephalico late ovato, antice leviter emarginato, basali magno, prebasali nullo ; 

 antennis 19 articulatis, antice pubescentibus; labio leviter couvexo sinesuturis; laminis dentalibus, 

 latis, brevibus, marginibus anticis reetis, angulis postieis esternis produetis ; dentieulis 10, conicis, 

 parvis sed acutibus et distinctis, utrinque intimis tribus arete coadunatis, duobus externis sejunctis ; 

 suturis scuto-episcutalibus inconspieuis, sed sterno-episternalibus modice conspicuis; pedibus luteolis, 

 leviter ■eorapressisj pari postremo gracile, articulo basali supra complanatis, subtus valde convexo 

 et sine spina, intus bispinoso, margine superiore esterno acuto, processu angulari valde elongato. 

 simplice vel bifido ; articulo tibiali basali fere Eequale, sed subcylindrico et graciliore; appendicibus 

 analibus lateralibus longis, dense minute profunde punctatis, utrinque spinis apicalibus 1 — 3. 



The length of cephalic segment is equal to its breadth. The mandibles are thick. 

 Breadth of the dental lamina much exceeds their length. The teeth are small, but 

 very distinct. The penultimate scutum is large, with its lateral margins strongly 

 arched ; the terminal large, with its lateral margins arched, very strongly elevated, 

 and its posterior very arcuate. The preanal scale is not canaliculate, but much nar- 

 rowed posteriorly, with its margins very nearly straight. The spines on the basal arti- 

 culation of the last pair of feet are very large ; the anterior is situated above the other. 

 This species is closely allied to S. Newportii, Lucas, (originally described by Mr. New- 

 port as S. Oervaisii). Mr. Newport, in his latin diagnosis, both in the Linnajan Tran- 

 sactions and the Catalogue of the British Museum, says " dentibus consjricitis," but in 

 the former work he says, " The most marked character of this species is the indis- 

 tinctness of the labial teeth, which in some specimens are entirely ivanthig "! What 

 does he mean ? Our species also is allied to S. ornata, Newp. That author states, 

 " pedum paris postremi articulo basali spinis tribus acutis," but does not state the form 

 of the head. Afterwards he says, " This is a very beautiful species, very distinct in 



