218 DR. W. T. CALMAN ON 



peduncle and shorter than the endopod. The distal segments of 

 the antennules are a good deal less slender than in the Brisbane 

 specimens. 



I am unable to perceive any other differences of importance, 

 and, while it might be considered that those enumerated would 

 justify giving a new varietal or even specific name to the Brisbane 

 specimens, I prefer to await further evidence from other localities 

 regarding the range of variation in this widely-distributed species. 



Among the Brisbane specimens of Sphceroma terebrans were 

 numbers of another Sphseromid, apparently belonging to the 

 genus Exosphceroma, but differing from all the described species 

 of that genus. There seems to be no reason for suspecting this 

 species of complicity in the destruction of the^ timber. The 

 body is more depressed than one would expect to find it in a 

 burrowing animal, and the mouth-parts are much less prominent 

 than they are in Sphceroma terebrans. 



Somewhat more suspicious is the case of an Isopod of which 

 a collection was sent from H.M. Dockyard, Simon's Town, by 

 Lieut. L. H. A. Shadwell, R.N.V.R. The specimens were from 

 " Greenheart camber piles, W. yard," and were labelled as 

 Sphceroma. They proved to belong to the species Parisocladus 

 stimpsoni (Heller), agreeing closely with Barnard's description 

 and figures (Ann. S. Afric. Mus. x. 1914, p. 399, pi. xxxii. G), 

 and being of the smaller size (male about 7'5 mm. long) which he 

 mentions as chai-acteristic of specimens from the east side of the 

 Cape Peninsula. Here, again, the general form of the body and 

 the disposition of the mouth-parts are not such as to suggest a 

 boring habit. On the other hand, the timber in question must 

 have been attacked by some boring animal, and if Sphceroma 

 terebrans had been present in numbers sufficient to cause visible 

 damage it could hardly have been entirely overlooked by the 

 collector. 



The only other animals in this gathering were two specimens 

 of Girolana sulcata. Like its congeners, this species is no doubt 

 predatory and not at all likely to attack wood. 



Limxoeia lignorum (Rathke). 



Cymothoa lignorum Rathke, Skrivt. Naturh. Selsk. Kj^benhavn, 

 v. (1) 1799, p. 101, pi. iii. fig. Ua-d. 



Limnoria terebrans Leach, Edinburgh Encyc. vii. 1814, p. 433 ; 

 Coldstream, Edinburgh New Philos. Journ. xvi. 1834, p. 316, 

 pi. vi. 



Limnoria lignorum White, Pop. Hist. Brit. Crust. 1857, p. 227, 

 pi. xii. fig. 5 ; Spence Bate and Westwood, Brit. Sessile-eyed 

 Crust, ii. 1868, p. 351, figs. ; Harger, Rep. U.S. Comm. Fish. vi. 

 1880, p. 373, pi. ix. figs. 55-57 ; Hoek, Verh. K. Akad. Wet. 

 Amsterdam (Tweede Sectie), i. No. 6, 1893, 103 pp., 7 pis. ; Sa.rs, 

 Crust. Norway, ii. 1897, p. 76, pi. xxxi. ; Chilton, Ann. Mag. Nat. 

 Hist. (8) xiii. 1914, pp. 380 & 448 ; id., N.Z. Journ. Sci.Technol. 

 ii. 1919, p. 3, figs.; Caiman, Marine Boring Animals, Brit. Mus. 



