18 NOTES OX TASMANIA^ CAPEELLIDAE, 



Distribution.— Hithevto recorded only from New South 

 Wales— off Port Hackiuo^, 22-38 fathoms ; off Botany Bav, 

 50-52 fathoms ; off Wata Mooli, 59-54 fathoms (Stubbing). " 



Genus Okthoprotella, Mayer. 



Orthoprotella, Mayer Die Caprellidae der Siboga Expedition, 



xxxiv., 1903, p. 85. 

 Orthoprotella, Stebbing, Mem. Austr. Mus., iv., 12, 1910, 



p. 631. 



In 1903 Mayer distinguished the genus Orthoprotella from 

 Piotella chiefly by the character that the pleou of the male 

 carries one pair of two-jointed rudimentary pleopods. He 

 remarks that " Die Verschmelzung von Segment 6 and 7 ist 

 hier ebeuso weit gediehen wie bei Protella." The genus was 

 established for Haswell's Frofella australis. 



Orthoprotella australis (Hasn-el/ ). 



Frotella aii.'itralis, Haswell, Proc. Linn. Soc. N.S. Wales, iv.) 



1880, p. 276, pi. xii., iig. 4, a, b. 

 Protdla aiistralia, Haswell, Cat. AusLr. Slalk-aud Sessile-Eyed 



Crustacea, 1882, p. oil. 

 Frotella australis, Haswell, Proc. Linn. Soc. N. S. Wales, 



ix., 1885, p. 997, pi. xlix., figs. 2-4-. 

 Orthoprotella australis, Mayer, Die Caprellidae iler Siboga 



Expedition, xxxiv., 1903, p. 35, pi. i., figs. 23-26, pi. vi., 



figs. 43-49, pi. ix., figs. 14, 37, 57. 58. 

 Orthoprotella australis, Stebbiug, Mem. Austr. Mus., iv., 12, 



1910, p. 632. 



This species is characterised by the presence of a pair of 

 short, acute, forwardly-directed spine-like processes on the 

 head, and by the extreme length of the first antennae, which 

 very nearly equal the body in length. The flagellum 

 is comparatively short and contains eighteen joints, the first 

 two of which are only partially separated. According to 

 Haswell the flagellum of the first antennae in the specimens 

 from Port Jackson is composed of seventeen joints. The 

 flagellum in Mayer's specimens has as many as twenty -three 

 joints in the male and twenty in the female. The last joint 

 of the peduncle is provided at its distal end with a well- 

 developed tootli-like process. The second antennae are 

 relatively short, the last joint of the peduncle being slightly 

 longer than the penultimate. The flagellum of six joints is 

 very short, not being half the length of the last joint of the 

 peduncle. The propodos of the first gnathopod has the 

 palm undefined ; in the second gnathopod the propodos is 



