4o6 DISCOVERY REPORTS 



The differences between the two groups may be given as follows : 



Form A Form B 



Hind-body not much wider than fore-body. Hind-body very much wider. 



Antenna in early stage much longer than Antenna in early stage shorter than peduncle 



antennule. of antennule. 



Exopod of maxilla enlarging early and always Exopod enlarging late, and without setae 



with setae. until last stage. 



Coxal spines on maxillipede 3 and leg i. No coxal spines. 



According to the list given by De Man (191 6) the following species of Panuliriis are 

 recorded from the Atlantic : 



P. echwatus, Smith. Pernambuco ; Fernando Noronha. 



P. argus, Latreille. Bermuda ; Antilles ; coast of Brazil south to Tropic of Capricorn. 

 P. laevicauda, Latreille. Tropical east coast of America, from Cuba to Rio de Janeiro. 

 P. regius, Brito-Capello. Abundant on west coast of Africa from 20° N to 16° S; 

 Cape Verde Islands. 



According to Von Bonde (1935) the following species have been taken in the South 

 African region : 



P. burgeri, De Haan. From Algoa Bay to Natal. 

 P. penicillatus, Olivier. Off Natal. 

 P. ornatus, Fabricius. Off Natal. 

 P. fasciatus, Fabricius. Off Natal. 



Distribution in the Atlantic. 



Form A, as shown in Table III on p. 407, was taken at twenty stations, between the 

 Cape Verde Islands and St Paul's Rocks; along the west African coast; off Cape Town 

 and Durban. Specimens of the same species are in the British Museum collection from 

 three stations in mid-Atlantic. Small specimens of 7-15 mm. were taken only at Sts. 691 

 and 692, in the region of St Paul's Rocks, which is probably one of its breeding stations. 

 The only species recorded from this region is P. giittatus. A single specimen of 10 mm. 

 taken at St. 701 near the Cape Verde Islands may indicate a breeding centre there, but 

 in that locality P. regius is the only possible parent according to present knowledge. 



Form B, also shown in Table III, was taken in considerable numbers in the equa- 

 torial region of the Atlantic. The distribution indicates that the main breeding centre is 

 at St Paul's Rocks, where Form A also appears to breed. It is probable that the two forms 

 here dealt with are the Phyllosomas of P. argus and P. regius, and that both of these 

 species occur at St Paul's Rocks. 



Verrill (1922, pis. iii, iiiA) has figured Phyllosomas apparently of my Form B from 

 Bermuda, regarding them as belonging to P. argus, which is the common species there. 

 As it is claimed that P. guttatus also occurs at Bermuda the identification of the Phyllo- 

 soma is not certain, but it suggests that Form B may be the larva of P. argus and Form A 

 of P. regius. 



