130 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.8 



known from Concha, Chile, while the smaller E. ovulum is known from 

 various localities in the Panamic region and has once been reported from 

 Lobos de Afuera Island, Peru (see above, p. 125). (The M.C.Z. has fur- 

 ther two lots marked "locality dubious" from, respectivelj^, Hawaii, and 

 Mazatlan, Mexico.) If P attains mollis is assumed to represent the full- 

 grown stage of Euthyonidium ovulum, it is impossible to explain how that 

 large species could have escaped discovery in the Panamic region. (See 

 also under E. ovulum.) 



Pattalus mollis Selenka 



Pattalus mollis Selenka, 1868, p. 113, pi. 8, figs. 4-5. 

 Thyonidium peruanum Semper, 1868, p. 67, pi. 15, fig. 17. 

 Thyonidium molle Semper, 1868, p. 243.— Ludwig, 1874, p. 4; 1883, 

 p. 163; 1887, p. 25.— Lampert, 1885, p. 174 (partim).—^\\kt\, 

 1886, p. 144. 

 Anaperus peruana Verrill, 1867, p. 322. 

 Pattalus peruana Verrill, 1867, p. 376. 

 Phyllophorus peruvianus H. L. Clark, 1910, p. 351 (partim). 



Diagnosis. — As for the genus. Color reddish purplish, pigment ex- 

 tracted in alcohol ; preserved specimens usually dull brown. 

 Type. — Berlin. 



Type locality. — Peru and Chile. 

 Distribution. — Common in Chile and Peru. 



Depth. — Shallow water, to 25 fms., often collected at tidemark, cling- 

 ing to rocks (H. L. Clark). 



Specimens examined. — A large series in U.S.N.M. and M.C.Z. Also 

 several specimens from the Allan Hancock Expeditions : 

 375-35. Independencia Bay, Peru, shore, January 13, 1935, 13 speci- 

 mens. 

 391-35. Lobos de Afuera Island, shore, January 17, 1935, 8 specimens. 

 820-38. San Nicholas Bay, Peru, 10-25 fms., Februaiy 6, 1938, 4 speci- 

 mens. 

 828-38. San Juan Bay, Peru, shore, February 8, 1938, 9 specimens. 

 831-38. Independencia Bay, Peru, shore, February 9, 1938, 3 specimens. 

 837-38. North Chincha Island, Peru, shore, February 11, 1938, 6 speci- 

 mens. 

 844-38. Lobos de Afuera Island, Peru, shore, February 14, 1938, 2 

 specimens. 



