SYSTEMATIC 227 



California (Lebour, 1938) and T. australiensis from New South Wales (Dakin & Colefax, 1940) being 

 known from the parent. There are species from South Africa which apparently belong to Trypaea and 

 which were recorded by Barnard (1950), but the only callianassid, Callianassa guineensis, which 

 undoubtedly comes from the region of the Benguela Current, was recorded by De Man (1928), and 

 this belongs to the sub-genus Calochirus, whose larva is of a different type (type II of Gurney). It 

 would seem therefore that the present larvae must belong to a species of Trypaea or Cheramus, and 

 one that is common in the region. 



Fig. 2. Callianassa sp. St. WS 998, 3. x. 50. a, b, stage I, 

 length 4-2 mm.; c, d, e, stage II, length 5 mm.;/, g, stage III, 

 length 5-5 mm. 



Fig. 3. Jasus lalandii, stage I, length 1-5 mm. 



SCYLLARIDEA 



, , ... , T , s Palinuridae 



Jasus lalandu (Lamarck) 



Gilchrist, 1916, p. 101. 

 Gurney, 1936, p. 416. 



Occurrence. St. WS iooo, 50-rO m., 1 phyllosoma, stage I. St. WS 992, 100-0 m., 1 phyllosoma, 

 ? stage VIII. 



Jasus lalandii is the common crawfish of the district. Phyllosoma, stage I, measured 1-5 mm. from 

 the front to the end of the telson. It has been well described by Gilchrist (1916). A peculiarity of the 

 phyllosomas of Jasus, unlike the other Palinuridae, is the absence of an exopod on the first maxillipede, 

 except for a minute rudiment in some of the later stages. Gurney (1936) specially notes this as a 

 character of all known phyllosomas of the Scyllaridae. The first stage of Jasus (which has been shown 

 by Gilchrist to emerge from a naupliosoma) is very like some of the known first stages of Scyllarus 



