COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 77 



Petrolisthes manimaculis Glassell 

 Plate 27, fig. 1 



Petrolisthes eriomerus, ?HiIton, 1916, p. 72. Schmitt, 1921, p. 180 

 (part). PRiclcetts and Calvin, 1939, p. 171 (part). Not P. erio- 

 merus Stimpson. 



Petrolisthes gracilis, Schmitt, 1921, p. 181 (part), pi. 32, fig. 4. Not 

 P. gracilis Stimpson. 



Petrolisthes manimaculis Glassell, 1945, p. 223, text-fig. 1 (type local- 

 ity, Morro Bay, California). Light, 1954, pp. 183, 186. 



Petrolisthes sp., Hewatt, 1946, p. 200. 



Previous records: 



California, Moss Beach, San Mateo County: R. Fields and E. Benton 

 (Glassell). Half Moon Bay: (Schmitt) [as P. eriomerus~\. Mon- 

 terey Bay; Pacific Grove: (Schmitt) [as P. gracilis^. Morro 

 Bay: S. A. Glassell (Glassell). Santa Cruz Island: W. G. Hewatt 

 and W. Williams (Hewatt). Newport Bay: (Ricketts and Cal- 

 vin) [probably this species]. Santa Catalina Island: (Schmitt) 

 [as P. gracilis]. Laguna Beach: (Hilton) [probably this species]. 

 Spindrift Beach, La Jolla: S. A. Glassell (Glassell). 



Baja California. "Lower California": (Schmitt) [as P. eriomerus; 

 probably this species]. 



Diagnosis: Carapace smooth to granulate anteriorly, nearly smooth 

 posteriorly; no epibranchial spine; front triangular; carpus a little over 

 twice to nearly three times as long as wide, anterior margin unarmed, 

 margins subparallel; outer margin of manus with a thin edge; merus of 

 walking legs unarmed. 



Description: Carapace usually a little broader than long, somewhat 

 granular, sometimes quite roughly so, on anterior regions ; nearly smooth 

 posteriorly, posterolateral regions with short, faint plications. Front tri- 

 angular, with a deep median groove ; no supraocular spine ; inner orbi- 

 tal angle not produced. Outer orbital angle not produced. No epibran- 

 chial spine. Carapace naked, or with a few scattered hairs in some small 

 specimens. 



First movable segment of antenna with a thick projecting ridge on 

 anterior margin ; second and third nearly smooth to slightly nodulate ; 

 flagellum naked. Outer maxillipeds lightly rugose. 



Chelipeds in large specimens finely granular, appearing almost 

 smooth; in females and small specimens sometimes rather roughly gran- 

 ular, especially on carpus and proximal part of manus. Merus with a 



