Talitroides, Orchestoidea 527 



2, Gen. Talitroides Bonnier 



1898 Talitroides, (J. Bonnier in:) Willem in: Ann. Soc. ent. Belgique, r;.42 p.208. 



Near to Talitrus (p. 524). Palp of maxilla 1 mucli reduced. Gnathopod 1 

 simple. Gnathopod 2 alike in both sexes. Pleopods 1 and 2 with inner 

 ramus rudimentaiy, reduced to a simple tubercle. Pleopod 3 consisting of 

 a small process representing the peduncle without rami. Eggs very few 

 and comparatively large, contained in a marsupium formed by very short 

 lamellae attached to the peraeopods 1 — 3. 



1 species. 



1. T. bonnieri Stebb.») ' 



With the characters of the genus. 



ürigin unknown (found in a conservatory at Ghent). 



3. Gen. Orchestoidea Nie. 



1849 Orchestoidea (Sp. un. : 0. tuberculata), H. Nicolet in: Gay, flist. Chile, r.'i 

 p.229 I 1888 0., T.Stebbingin: Rep. Voy. Ohallenger, u29 p.231 | 1891 0., T. Stebbing 

 in: Ann. nat. Hist., ser.6 v.S p.328 | 1898 0., Calman in: Ann. N. York Ac, ull p.265 \ 

 1850 Talitronus, J. D. Dana in: Amer. J. Sei., ser. 2 v.9 p. 295 | 1852 T. (Sp. un.: T. 

 insculptus), J.D.Da.na,'m: P. Amer. Ac, i?. 2 p. 202 | 1851 Megalorchestes, Megalorchestia. 

 F. Brandt in: Bull, phys.-math. Ac. St.-Petersb., v.9 p. 142, 310. 



Like Taliti'us (p. 524), except that gnathopod 2 in d is powerfully 

 subchelate instead of feebly chelate. 



5 species. 



Synopsis of species: 



Body with teeth or 

 Body smooth — • 3. 



f Body with teeth or tubercles 



I Body tuberculate 1. O. tuberculata . . p. 527 



\ Body with dorsal teeth on pleon 2. O. fischerii . . . p. 528 



f Eyes well separated — 4. 



4 



Eyes approximate 5. O. brasiliensis . . p. 529 



Gnathopod 2 strongly subchelate; only (J known 3. O. californiana . . p. 528 

 Gnathopod 2 feebly chelate; only $ known ... 4. O. pugettensis . . p. 529 



1. O. tuberculata Nie. 1849 Talitrus chilensia {^)-\-0.t., H. Nicoletin: Gay, 

 Hist. Chile, ».3 p.229; p. 231 Crust. t. 2 f. 4 | 1852 Talitrus ornatus (?) + Talitroiim 

 insculptus, J. D. Dana in: P. Amer. Ac, v.2 p.201; p. 202 | 1853 & 55 Orchestia (Talitrus) 

 insculpta -j- 0. tuberculata, J. D. Dana in : U.S. expl. Exp., v. 13 ii p. 855 t. 57 f. la — m {<S), 

 n— r($); p. 1595 | 1893 0. t, A.DellaValle in: F. Fl. Neapel, r. 20 p. 496 t. 57 f. 55. 



In <S peraeon segments, side-plates, 2*^ Joint of peraeopods 3 — 5 and 

 sometimes pleon segments 1 — 3 sculptured or marked with transverse 

 ridges and series of tubercles; in g the sculpturing is almost evanescent, 

 chiefly observable as a few faint sulcations or rugosities on side-plates and 

 2*1 Joint of peraeopods 3 — 5. Side-plate 1 narrow, curved forward, 2*^— 5t^broad, 

 5*^ decidedly less deep than 4*''. Eyes subrotuud, large. Antenna 1 very 



^) Spec. nov. After Jules Bonnier. ■ — Willem published Bonnier's account and 

 name of the genus, without describing or naming the species, for which the genus is crcafed. 



