34 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



Material examined: 176 specimens from 33 Lund University Chile 

 Expedition localities. (See Table 1) From Punta Liles, Bahia San 

 Vicente, to Punta Santa Maria, near Agua Fresca, Estrecho de Magal- 

 lanes, Chile. In addition, 1 young specimen from Taltal, Chile, R. 

 Paessler, 1889 (Z.M.H. No. K 26808), and 1 female from Macquarie 

 Island, SW of New Zealand, December 2, 1949, Marshall Laird (gift 

 of L. R. Richardson). 



Measurements: Largest specimen, male: length 14.1 mm, width 17.3 

 mm, rostrum 0.7 mm, width of front 3.1 mm, cheliped 24.7 mm, chela 

 16.0 mm, dactyl 9.5 mm, height of palm 9.2 mm, ambulatory legs 29, 

 27.5, 25.5 and 22 mm respectively. Ovigerous female: length 11.4 mm, 

 width 13.6 mm. 



Color in life: Slaty blue to reddish brown, legs banded. (Mawson 

 Exped.) Grayish brown with spots of different color. (Lund Univ. Chile 

 Exped.) 



Habitat: Under stones and kelp. (Stebbing) An integrant member 

 of the interesting Macrocystis fauna. (Lagerberg) Rather common in the 

 lower part of the littoral, under stones, and in rock pools. (Lund Univ. 

 Chile Exped.) 



Depth: To 270 meters. (Doflein and Balss) Lund University Chile 

 Expedition specimens were dredged in the Golfo de Ancud at 60 meters 

 and in the Seno Reloncavi at about 170 meters. In the Strait of Magellan 

 region, however, they were shore collected exclusively, as they were 

 frequently in the more northerly portion of their range. The species 

 presents a classic example of what might be called "polar emergence." 



Size and sex: Males from Conception and Chiloe measured from 

 4.5 to 5.1 mm, non-ovigerous females from 3.9 to 6.8 mm, ovigerous 

 females from 3.5 to 5.8 mm, and young to 2.3 mm or smaller. Males 

 from Strait of Magellan measured 8.3 to 14.1 mm, non-ovigerous females 

 from 5.3 to 11.6 mm, ovigerous females from 7.6 to 11.4 mm, and young 

 to 3.7 mm. The small males from the north are listed as young. 



Breeding: Ovigerous females were encountered by the Lund Uni- 

 versity Chile Expedition at Bahia de Ancud in November, at Seno 

 Reloncavi in November, January, February, and March, at Canal Chacao 

 in February, at Estero Reloncavi in April, and at Estrecho de Magal- 

 lanes in May. 



Remarks: In a letter dated 28 May 1957, Dr. I. Gordon states that 

 there is no specimen in the British Museum of Halicarcinus planatus 

 that can be identified as the Banksian type of Fabricius. There is in the 

 dry collection a poorly preserved fragment labeled "Cancer orbiculus 



