216 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



Color in life: Color of the adult dark brown; of the young female 

 paler, and reddish. (Bell) 



Habitat: In crevices of rocks. (Bell) In fish net near the shore. 

 (Rathbun, 1910) The masking habit of the species is discussed by Auri- 

 villius (1889). 



Depth: Shore to 5 fathoms. 



Breeding: An ovigerous female measuring 65 mm was taken by the 

 Velero III in February at San Juan Bay, Peru. No definite date can be 

 assigned to the two ovigerous females taken at Montemar by the Lund 

 University Chile Expedition, as they were obtained at the Marine Station 

 on various September and October dates, 1948, and one June date, 1949. 



Remarks: In keeping with the known distribution of the species, the 

 writer follows A. Milne Edwards (1878, p. 138, footnote), rather than 

 Smith (1869, p. 33) and Moreira (1901, p. 66, footnote), in consider- 

 ing Rio de Janeiro an error of provenience. Bell's initial reference (1836, 

 p. 62) to a Galapagan habitat is also discounted in view of the subse- 

 quent assertion {Ibid., p. 63) : "found by Mr. Cuming with Ep. dentatus 

 at Valparaiso." Certainly, the evidence of all specimen material recov- 

 ered since Bell indicates that Taliepus marginatus is endemic to the 

 coasts of Peru and Chile, and that it occurs neither in the Atlantic, as 

 confirmed by recent correspondence with Dr. A. Lemos de Castro of 

 Brazil, nor in the Galapagos Islands, as confirmed by experience of 

 Velero III collectors. Accordingly, its type locality is hereby corrected to 

 Valparaiso, Chile. 



From the specimens at hand it is apparent that the last half of the 

 second couplet of the key of Rathbun (1925, p. 162) has been reversed. 

 Thus it is Taliepus marginatus., rather than T. dentatus, that possesses 

 the strong propodal tooth in the adult, a fact borne out by Rathbun's 

 diagnosis of the latter species {op. cit., p. 165), as well as by Bell (1836, 

 p. 63). The statement concerning the relatively shorter legs of T. denta- 

 tus is not substantiated by measurement, the female of T. marginatus 

 measured above having proportionately shorter legs than a female of 

 T. dentatus of like size. 



There is reason to believe that the male first pleopod characterized 

 above and illustrated in Plate L, fig. 10, is worn or eroded. In a young 

 male of 76 mm, Velero III station 371-35, the apex seems much more 

 like that of Taliepus dentatus, Plate L, fig. 9. 



