384 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Van Dyke red bands at distal ends of merus and on carpus. Hand Pompe- 

 ian red ; movable finger carmine, tip orange yellow. Fixed finger similar, 

 fading to white at tip. Ambulatory legs same as merus of cheliped. Pro- 

 podus a shade darker with bands of Indian lake. Dactyl Indian lake; 

 nail yellow. (Petersen) ^ 



Habitat. — Rocky shore. 



Remarks. — H. pyriformis was considered a rarity by Hancock Expe- 

 dition collectors, who were alwa on the alert for its telltale "peppermint 

 stick" legs. The species had been^ nown previously by the type specimen 

 collected by Cuming circa 1829, no longer extant, and by the Hassler 

 specimen, collected in 1872. Both of these specimens were males. 



The young of the species are very hairy, this feature being especially 

 noticeable on the last three segments of the ambulatory legs. The smallest 

 specimen in the series measures 7 mm in length. 



The female of H. pyriformis is now known and the range of the 

 species is hereby extended to include six of the islands of the Galapagos 

 group. 



Genus LISSA Leach, 1815 



Lissa aurivilHusi Rathbun 



Plate 65, Figs. 3, 4 



Lissa aurivilHusi Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 575, pi. 41, 

 fig. 4, 1898 ; Proc. Washington Acad. Sci., vol. 4, p. 284, 1902 ; Bull. 

 129, U.S. Nat. Mus., p. 333, pi. 246, fig. 2, 1925. Crane, Zoologica, 

 vol. 22, no. 3, p. 59, 1937. 

 Type locality. — Off Cape San Lucas, 31 fms. 

 T^^e.—USNM No. 21575. 



Range. — From Magdalena Bay, Lower California (Albatross), to 

 Cape San Lucas (Albatross); Galapagos Islands (Hopkins-Stanford 

 Expedition) ; to 35 fms (Crane). 



Atlantic analogue. — L. bicarinata Aurivillius. 



Diagnosis. — Gastric elevation angular, continued posterolaterally as 

 a sharp branchial crest. Posterior margin doubly concave ; a cardiac eleva- 

 tion. 



Material examined (18 specimens from 12 stations). — 

 167-34. Post Office Bay, Charles Island, 15 fms, Jan. 19, 1934, 1 



young female. 

 169-34. Academy Bay, Indefatigable Island, 15-25 fms, Jan. 20, 1934, 



1 female (photographed). 

 183-34. James Bay, James Island, 50-70 fms, Jan. 24, 1934, 2 young 

 males. 



