1804. PROCEEDINGS OF THE NATIONAL MUSEUM. 495 



separated by furrows from the lateral portions of the somite, whicli are 

 hardly at all elev^ateil. Both these lateral portions and the knobs are 

 thickly beset Avith strong- npright independent spinules. In the absence 

 of any intermediate form, G. sphiosns may be regarded as a distinct 

 species. 



Size. — Length of the body, 2 cm. 



Locality. — Two female specimens, No. 4205, U.S.N.M., were collected 

 by Col. N. Pike at Mauritius. 



GOXODACTYLl^S CHIKAGEA (F a b r i e- i u 8). 

 Muntii. marina harhadexnis, Petivkr, Pterigraph, Araeric, pi. xx, flg. 10. 

 SqniUa chiragra, Fahriciu.s, Ent. Syst., ii, p. 513, 1793. Desmarest, Consid. 



Crust., p. 251, pi. XLiii, 1825. 

 Cancer (Mantis) chiraf/ra, Heubst, Naiurg. Krabbeu, ii, p. 100, 1796. 

 GonodactiiUts chiragra, Latreille, Encytl. Meth., x, \). 473, 1825. — Miers, Ami. 

 aud Mag. jNat. Hist. (5), v, p. 118, 1880. — Brooks, Voyage of the Challenger, 

 XVI, ii, p. 50. 

 Govodactylns smithii, PococK, Arm. aud Mag. Nat. Hist. (6), xii, 1893. 



The collections of the U. S. Fish Commission and the National ]\Iuseum 

 contain a large number of specimens of this species from numerous 

 localities among the Florida Keys, in the Gulf of California aud the 

 Abrolhos Islands. One si)ecinien (No. 9493, U.S.N.M.) was collected 

 by the Albatrons at station 2323, off Havana, Cuba, at a depth of 163 

 fathoms, and I have added to the collection specimens taken in a foot or 

 two of water on the sand flats in the Bimini Islands, Bahamas. They are 

 common there, hiding among the algie and under shells and stones. One 

 specimen was found in a red sponge. When disturbed they move from 

 one shelter to another with great rapidity. The coloring is distinctly 

 protective, varying from a mottled green and white to a nearly pure 

 green. I liave also to record the occurrence of this species in burrows 

 in the rock at Port Henderson, Jamaica. 



In addition to these there is a single small specimen collected by W. 

 L. Abbott in the Indian Ocean (No. 18457, U.S.N.M.) and a number 

 of small specimens collected by Col. N. Pike at Mauritius (No. 2202, 

 U. S. N. M.). These differ from the G. chiragra of our coast in that the 

 carime of the sixth and terminal abdominal segments are narrow 

 instead of being broadly rounded. 



O D O N T O D A C T Y L II S, new geuus. 



Odontodaclglus (subgenus), Bigelow, .Jolnis Hopkius Fniv. Circ., 106, p. lOO, 

 Juue, 1893. 



Gonodactyhis (part), Latreille, Eiicycl. Moth. Hist. iVat., x, p. 473, 1825. — Ber- 

 THOLi), Abhaudl. k. Gesellscb. Wiss. Gottiugen, iii, p. 30, 1847. — de Haan, 

 Siebold's Fauna Japonica, Crust., p. 225, 1849. — White, Proc. Zool.yoc.,1850. 

 p. 96. — A. Milne-Edwards, Nouv. Arcbiv. Mus. Hist. Nat., iv, p. 65 (foot- 

 note), 1868.— MiERS, Ann. and Mag. Nat. Hist. (5), v, p. 115, 1880.— von Mar- 

 tens, Sitz.-Ber. Gesel. Naturf., Berlin, 1881, p. 93.— PococK, Ann. and Mag. 

 Nat. Hist. (6), xii, 1893. 



Biagno.sis. — Stomatopoda having a movable joint between the sixth 

 ,abdominal somite and the telson ; the hind body moderately convexj 



