No, 10 garth: brachyuran fauna of the galapagos 361 



Rathbun (1937) records Calappa saussurei from Wreck Bay, Chat- 

 ham Island, 32 fms, Hancock Expedition of 1934. After examining this 

 specimen, the writer is convinced that it is a young C. convexa; indeed, he 

 is unable to distinguish it in any way from the South Seymour Island 

 specimen and has recorded both above. 



Genus MURSIA Leach, 1823 



Mursia gaudichaudii (Milne Edwards) 



Plate 62, Figs. 3, 4 



Platymera gaudichaudii Milne Edwards, Hist. Nat. des Crustaces, vol. 2, 



p. 108, 1937. 

 Mursia gaudichaudii Rathbun, Bull. 166, U.S. Nat. Mus., p. 220, pi. 66, 

 figs. 1-3, pi. 67, figs. 1-6, and synonymy, 1937. Crane, Zoologica, vol. 

 22, no. 7, p. 99, 1937. 

 Type locality. — Chile. 

 Type. — In Paris Mus. 



Range. — From Farallon Islands (Albatross) to Valparaiso, Chile 

 (type loc.) ; Galapagos Islands (Velero III). 



Diagnosis. — Carapace transversely oval, anterolateral margins arcuate 

 and minutely dentate, posterolateral margins sinuous, entire. A strong 

 lateral spine directed outward ; a similar spine at distal end of merus. 

 Material examined (27 specimens from 7 stations). — 

 191-34. Lat. 0° 55' S, Long. 90° 30' W, 70 fms, Jan. 26, 1934, 2 



young (USNM No. 69224), 1 young (AHF no. 34040). 

 195-34. North of Charles Island, 70-80 fms, Jan. 29, 1934, 10 young 



(AHF no. 34041). 

 788-38. SE of Daphne Major Island, 55 fms, Jan. 19, 1938, 1 male 



(AHF no. 38022). 

 792-38. Off Daphne Minor Island, 70-80 fms, Jan. 20, 1938, 1 female, 



4 young (AHF no. 38023). 

 795-38. Sulivan Bay, James Island, 35-40 fms, Jan. 21, 1938, 1 young 



(AHF no. 38024). 

 810-38. (D-2) Barrington Island, 73 fms, Jan. 26, 1938, 2 young 



(AHF no. 38025). 

 814-38. North of Hood Island, 20-40 fms, Jan. 28, 1938, 1 male 

 (photographed), 4 young (AHF no. 38026). 

 Measurements. — Largest specimen, male: length 16.6 mm, width 

 including lateral spine 35.2 mm, length of spine 6.8 mm, cheliped 22.8 

 mm, chela 11.0 mm, height of chela 8.5 mm, dactyl 5.8 mm. 



