312 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



the latter composed of four larger spines and additional secondary spin- 

 ules ; carpus somewhat inflated, bearing roughly a dozen spinules, the 

 two superodistal most prominent ; manus with a double row of spinules 

 above, palm smooth but hairy; fingers long, slender, incurving, finely 

 dentate, and closing without a gape. 



Ambulatory legs exceeding cheliped in length, slender, cylindrical, 

 and hairy; meri little broadened medially, devoid of marginal spines 

 except for a single spine at superodistal angle, and each marked with 

 three transverse bands of red ; carpi imperceptibly grooved ; propodi long, 

 straight, cylindrical ; dactyli short, the amber nails only curved. 



Male sternum and abdomen together forming an almost plane and 

 sparsely hairy surface; abdomen consisting of seven separate segments, 

 widest at base of third segment, terminal segment narrowly rounded. 

 Male first pleopod prominently notched at level of aperture, a setiferous 

 lobe above notch and a keel below; tip acuminate, inclined at a slight 

 angle, an irregular row of setae along concave margin. (See Plate S, 

 fig. 8) 



Female similar to male except for a slight foreshortening of the ap- 

 pendages, most apparent in the meral and propodal segments, giving a 

 more compact and robust appearance. 



Material examined: 14 specimens from 7 Galapagos stations. (See 

 Garth, 1946, p. 383) 



Measurements: Male: length 21.4 mm, width 15.6 mm, rostrum 

 2.4 mm, width 2.6 mm, cheliped 23.0 mm, chela 10.8 mm, dactyl 5.1 

 mm, height of palm 3.5 mm, ambulatory legs 28.5, 30.0, 27.5, and 24.5 

 mm, respectively. Largest specimen, female: length 25.8 mm, width 

 19.4 mm. 



Color in life: Carapace light ochre red with Van Dyke red markings; 

 marginal spines and a triangular spot on intestinal region white. Cheli- 

 peds light vinaceous fawn with bands of vivid Van Dyke red on merus. 

 Ambulatory legs similarly marked ; nails yellow. 



Size and sex: Males examined are from 7.3 to 21.4 mm, females 

 from 6.9 to 25.8 mm. None of the females is ovigerous. 



Habitat: From rocky shore in six of seven instances; the seventh 

 recovery was from coral inside the submerged crater of Onslow Island. 



Depth: Intertidal to one fathom. 



Remarks: Now that Herbstia pubescens of the Bay of Panama has 

 been rediscovered, an interesting comparison with that species is possi- 

 ble. In H. pyriformis the intestinal region projects beyond the normal 

 posterior margin as a dome surmounted by an erect tubercle, whereas in 



