COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 99 



are from Lund University Chile Expedition specimens, previously ex- 

 amined by the writer. A type specimen of Porcellana laevigata, Acad- 

 emy of Natural Sciences of Philadelphia Cat. No. 648, measures 17.6 

 mm in length. 



Color: Dark brown with interrupted lines of brown and yellow. 

 (Dana) Reddish. (Nicolet) Specimens examined were light red or pur- 

 ple. 



Ecology: The species occurs among and under stones in the in- 

 tertidal zone ; specimens were encountered at all tide levels by the Lund 

 University Chile Expedition. Murray (1895) reported it as Petrolisthes 

 validus from fresh water in Canal Messier. Specimens collected by the 

 Lund University Chile Expedition at Canal Moraleda were from "boul- 

 ders with fresh water running between them." 



Ovigerous females have been reported in January, April, June, and 

 November. 



Remarks: Nicolet (1849) evidently recognized Petrolisthes laevi- 

 gatas as a more southern form than P. granulosus, for he mentioned 

 that it occurs in the southern provinces of Chile; however, he gave no 

 distinguishing characters other than those cited by Guerin. Dana 

 (1852) characterized P. laevigatas adequately for the first time, as 

 Porcellana valida, new species. He noted the rostrum without strong 

 median groove, the hairy antennae, and the hairs on the outer half of 

 the dorsal surface of the manus, all of which distinguish it from Petro- 

 listhes granulosus. 



Cano's (1889) record of Petrolisthes validus from Callao, Peru, is 

 believed to be based on P. granulosus because Callao is well outside 

 the range of the present species. By the same reasoning, Boone's (1938) 

 Petrolisthes granulosa from Archipielago de Chiloe is here referred 

 to P. laevigatus. 



Range: Restricted to southern Chile, from Peninsula de Coquimbo 

 south to Canal Messier. 



Petrolisthes violaceus (Guerin) 

 Plate 28, fig. 4 

 Porcellana violacea Guerin, 1831, pi. 3, figs. 2, 2A; 1835, p. 115 (type 

 locality, Chile) ; 1838a, p. 33 (type locality restricted to peninsula 

 of Talcaguana [Talcahuano] ) ; 1838b, p. 6, pi. VII 25, fig. 2; 

 1839, p. 174, pi. 51, fig. 2. H. Milne Edwards, 1837. p. 250. H. 

 Milne Edwards and Lucas, 1844, p. 34. White, 1847, p. 62. Nicolet, 

 1849, p. 196. Dana, 1852, p. 416; 1855, pi. 26, figs. 6a-b. 

 Kinahan, 1857, p. 346. 



