316 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



Color in life: No notes on color are available for this species. 



Habitat: On under side of stone at extreme low tide level. (Crane, 

 1947) Of the 11 instances in which data on bottom type are available 

 Velero III specimens were recovered 8 times from Pocillopora coral, as 

 against one time each from sand with shell, sand with rock, and rock. 

 Askoy expedition specimens were also from living coral. 



Depth: Shore to 15 fathoms; exceptionally, as at Cocos Island, 31 

 to 50 fathoms. 



Size and sex: Males in the present series range from 5.6 to 9.0 mm, 

 females from 7.0 to 8.6 mm, ovigerous females from 7.1 to 8.3 mm. An 

 ovigerous female from Clarion Island is larger than any from the main- 

 land, measuring 10.8 mm. Young to 3 mm are to be found, those of 

 3.8 mm and over being determinable as to sex. 



Breeding: Ovigerous females were encountered by the Velero III 

 in February off Panama and by the Askoy in April off Colombia. 



Remarks: Admitting Rath bun's determination of a very young speci- 

 men from La Playa, which she herself questioned, as Herbstia tumida, 

 the range of the species is extended to Ecuador. 



Herbstia parvifrons Randall 

 Plate S, Fig. 5 ; Plate 34, Fig. 2 



Herbstia parvifrons Randall, 1839, p. 107. Gibbes, 1850, p. 170. Stimp- 



son, 1857b, p. 451. Lockington, 1877c, p. 65. Holmes, 1900, p. 38. 



Nininger, 1918, p. 41, figs. 19, 20. Schmitt, 1921, p. 215, text-fig. 



135. Rathbun, 1925, p. 296, pi. 106, text-fig. 99. 

 Herbstia (Herbstiella) parviformis [for parvifrons], Miers, 1886, p. 49. 

 Herbstia (Herbstiella) camptacantha, Rathbun, 1893a, p. 79. Holmes, 



1900, p. 37. [Not H. camptacantha (Stimpson).] 

 Rhodia parvifrons, Rathbun, 1900, p. 511; 1904, p. 175 (part: not the 



Acapulco locality). Weymouth, 1910, p. 34, pi. 7, fig. 18. 

 Herbistia parvifrons, Hilton, 1916, p. 72. 



Type: Female holotype, length "scarcely 1 inch" (25.4 mm), in 

 Museum Philadelphia Academy of Science. 



Type locality: Western America; T. Nuttall, collector. 

 Localities subsequently reported, with collectors: California: South 

 of Point Pinos Lighthouse, Monterey Bay (Weymouth) ; San Pedro 

 and Long Beach, H. N. Lowe (Rathbun, 1925) ; Laguna Beach, W. A. 

 Hilton (Hilton, Nininger); Santa Catalina Island: Catalina Harbor, 

 30-40 fathoms, W. H. Dall (Rathbun, 1893a, as Herbstia camptacan- 

 tha), Catalina and Isthmus Harbors, Anton Dohrn (Rathbun, 1925) ; 



