South African Crustacea. 241 



PINNOTHERES PISUM (?) (Linn.). 



1767. Cancer pisum, Limi., Syst, Nat,, ed. 12, p. 1039. 



1802. Pinnotheres pisum, Bosc, Hist. Nat. Crust., vol. 1, p. 243. 



1817. Leach, Malac. Podoplith. Brit., pi. 14, 



figs. 1, 2, 3. 

 1908. Lagerberg, G-oteborgs K. Vet. Hand!., ser. 



4, vol. 11, p. 105, pi. 3, figs. 9-11. 

 1916. ,, Borradaile, Brit. Antarct. Exp., Zool., 



vol. 3, p. 100, fig. 12. 



A specimen, labelled "from Avictda (pearl oyster)," taken in 

 Mossel Bay, shows a very close resemblance to the figures which 

 Leach gives of P. JH'SWTO. The Avicula purports to come from 

 a depth of 12 fathoms, but the crab had become dry before it 

 attracted attention. Accordingly it is no longer in a good state 

 for precise examination. It has the broad pleon of an adult 

 female, from which a multitude of ova have probably escaped. 

 A 2644. 



PINNOTHERES OSTREARITTS, Eathbun. 



1901. Pinnotheres ostrearius, Eathbuu, Bull. U.S. Fish. Comm. for 



1900, vol. 2, p. 20, figs. 3 0-6. 



A specimen, female, with carapace 8 mm. long, and 10 mm. 

 broad, has the chela and third maxilliped so fully answering to 

 those figured by Miss Eathbun for her species above-named that 

 the identification seems reasonable. The specimen, partially dried, 

 was procured by Mr. Barnard from a Modiola shell, in Delagoa 

 Bay. A 3145. 



A similar specimen, of the same sex, is recorded as taken 

 from an ascidian. The carapace measures about 10 mm. in 

 lensth bv 11 mm. in breadth. The small but elongate mandible 



o f 



has a curved cutting edge fringed with a dozen small denticles 

 followed below by a powerful tooth ; the terminal joint of the 

 palp is fringed with setae. The meral joint of the third 

 maxilliped is broader than that shown in Miss Eathbun's text- 

 figure, and the terminal joint seems to be considerably more 

 than half the length of the preceding joint, but the setose 

 furniture makes a precise estimate difficult. 

 Locality. St. James', Cape Peninsula. 



