170 Addis on E. Vcrrill, 



and uropods ; u, basal spines ; u', u", lamellae ; i p, second pleopod 

 of male. 



Figure 2. The same (?); female, less enlarged; a', flagellum of anten- 

 nule : 1", leg of second pair: 2a, telson (t) and uropods (u) : 2cl, p, 

 p', p", pleopods. By A. H. V. 



PLATE XXVII. 



Figure i. Alpheus arinillatus=lancirostris; la, antennule; i, 2, 3, three 

 joints of stalk: ib, antenna; s, scaphocerite or antennal scale; s', 

 its spine: ig'", outer maxilliped : il', smaller cheliped of first pair: 

 il", cheliped of second pair : il"', leg of third pair : 10, three of the 

 eggs: ip, ip', two of the pleopods: is, spinules, setae, and hairs of the 

 telson or the posterior lamella of the uropods (u") ; very much 

 enlarged. Original by A. H. V. 



PLATE XXVIII. 



Figure I. Alpheus (or C rang on) baliaincnsis; male, from Bermuda ; slides 

 h', h" ; la, one of the antennules with its basal spine (s) and ootocyst 

 (o) ; i, 2, 3, joints of peduncle; ib, , one of the antennae ; b', flagellum; 

 c, scaphocerite, with its long plumose hairs only indicated; s, scale; 

 s', its spine; 1", a leg of the second pair; in', n", n'", maxillipeds of 

 three pairs; im', m", first and second maxillae, xn; ij, mandible, 

 r, right, and 1, left, xn; ij', right, x 10; j", }'", jaws x 28; it, 

 telson; lu, uropods, plumose hairs omitted ; p, pleopod. 



Figure 2. Alpheus, sp. ?, from Bermuda; telson. 



Figure 3. Alpheus (,or Crangon) bahamensis; cotype; 3!', smaller chela 

 of first pair, with carpus and merus ; 3!", leg of second pair ; c, tips 

 of its fingers ; 3!"', leg of third pair. All are much enlarged. 



All on plate are original; in", j-j'", 2, by A. E. Verrill; the rest 

 by A. H. Verrill. 



PLATE XXIX. 



Figure i. Alpheus candei,, from Bermuda, 1901. Frontal organs; a, 

 antennule; b, antenna; o, ootocyst; s, scale of scaphocerite; sp, its 

 spine; s', basicerite, x6^; ia, basicerite and adjacent parts more 

 enlarged. 



Figure il" x . Leg of second pair, x 6^/2 ; il" a , the same less enlarged, 



from another specimen. Figure il'", legs of third pair; in"', third 



maxilliped; ip, pleopod; it, telson, and u, u", uropods. By A. H. V., 

 from slides c-c'". 



Figure 2. Alpheus clamator, from San Diego, California; 2a, 1'", leg of 

 third pair; 1", leg of second pair; 1'"", legs of fifth pair. Figure 2b, 

 the same; c, carpocerite; s', antennal scale; sp. its spine; all x 6^4. 

 By A. H. V. 



