1 6 NOTES ON TASMANIAN CAPRELLIDAE, 



Geraldtou, and Cockburn Sound, Freuiantle, "Western 

 Australia ; and records for the first time from Australian 

 seas Pseudojnoto falax, Protdht similis, Metaproiella sanda- 

 lensis?, AciconuJa miranda, Monoliropus agilis and Hemiae- 

 gina niinuta. 



Family CAFEELLIDAE. 

 Genus Dodecas, Stehbing. 



Dodecas, Stebbins^, Ann. Ma?. Nat. Hist., (5), xi , 1883, 



p. 207. 

 Dodecas, Stebbinw, Report Sci. Eesiilts " Challenger " Exped., 



Zool., xxix., 1888, pp. 547, 1232. 

 Dodecas, Mayer, Fauna und Flora des Golfes von Neapel, 



xvii., Caprelliden, 1890, p. 15. 

 Dodecas, Mayer, Die Caprellidae der Siboga Expedition, 



xxxiv., 1903, p. 29. 

 Dodecas, Stebbiug, Mem. Austr. Mus., iv., 12, 1910, p. 629. 



Tlie original definition based on specimens from Kerguelen 

 Island holds with slight modification for the three species 

 now included in the genue. 



Stebbing's diagnosis is as follows: — "The mandibles 

 having an elongate triarticulate palp. Six pairs of feet 

 attached to the peieion, the fourth segment having none. 

 Branchial vesicles at the base of the second gnathopods, the 

 fii'st pereiopods, and attached to the footless fourth perion- 

 segment, the rudimentary pleon having two pairs of biartic- 

 ulate appendages." 



In 1903 Mayer added the new species Dodecas hexacenfrum 

 from Watson Bay, Port Jackson, New South Wales. He 

 remarks that " Die Genusdiagnose bleibt unveriindert" and 

 gives as the generic characters " Mandibular-palpus 3 gliedrig, 

 Geissel der Hinterfiihler hochstens 5 gliedrig, Bein 3 normal 

 gegliedert, Bein 4 felilt, Bein 5 mit 4 treien Gliedern, Kiemen 

 an Segment 2-4, Abdomen beim ^ mit 3, beim 9 mit 2 Paar 

 Anhiingen." 



The Caprellidae obtained by the "Thetis" Trawling 

 Expedition on the coast of New South Wales included a 

 third species, Dodecas decacentrnm, Stebbing, which necessi- 

 tates a slight change in the generic description since the 

 species attains a greater number than five in the joints of 

 the second antennae. 



The genus may be defined as follows : — Mandibular palp 

 three-jointed, flagellum of second antennae with five or more 

 joints', first peraeopod with normal number of joints, second 

 wanting, third with four free joints, branchial vesicles on the 



