eo ‘ mor R J 
ee 
ar PROCEEDINGS OF THE NATIONAL MUSEUM. 261 
Length 11; width 9 millimeters; ratio 1:.82. No. 3. Length 10.5; width 
9 Pitmncters; ratio 1 :.86. 
The color in aleohol is a cinnamon brown; fingers of a pinkish tinge. 
I think this species is not the young form of M. cornutus Saussure. 
In large specimens of cornutus, according to A. Milne Edwards, the 
length is only a trifle greater ee the width; while in our series of 
acuticornis, the larger the specimen the narrower the carapace. In 
acuticornis the prieocular spine is proportionally shorter and the an- 
tennal spine longer than in Milne Edwards’s figure of cornutus. In the 
twenty-two specimens examined there is no trace of spines on the 
manus. 
The young Michraxv enumerated by Mr. W. C. Kendall (loc. cit.) in his 
list of Brachyura collected by the schooner Grampus on the fishing 
grounds off the west coast of Florida, undoubtedly belongs to this 
species. 
RECORD OF SPECIMENS EXAMINED. 
Gulf of Mexico; U. S. Fish Commission, 1885 and 1889: 
| Fi | oa vy 
| | A : 
Gatto. | Station,.| Lat.N: | Long. W: Fath. Temper, ature of bottom. 
5 oms. ature. | 
a= = ss ee [| ——— — H = eit — 
ip | 
(e} / ur (o) / tia 
15811 2406 28 46 00 84 49 00 26 ers. 8. Co. 
15819 2409 27 04 00 83 21 15 26 ; ers. ey. Ss. _brk. Sh. 
15817 2411 26 33 30 83 15 30 27 ee wh. 5. bk. Sp. 
15206 5108 26 19 00 83 11 00 27 68 | S. alge. 
15812 2413 26 00 00 82 57 30 24 ne s. bk. Sp. brk. Sh. 
15813 2414 25 04 30 32 59 15 26 fne. wh. 8. brk. Sh. 
Caribbean Sea; U. 8S. Fish Commission, 1885: 
| 
Cat. No. | Station. Lat. N. | Long. W. | pe Nature of bottom. 
=: = ——— —— = ae ee = ht a4 a= a 
loamy ay see 121) V aa ° fk Kt | 
9502 2330 23 10 48 82 19 15 | 121 | fne. gy. Co. 
15818 2365 22 18 00 87 04 00 | 24 | wh. R. Co. 
16307 2362 22 08 30 86 53 30 | 25 | Co. S. 
15814 2363 22 07 30 87 06 00 | 21 | wh. R. Co. 
7760 2136 17 43 30 75 38 25 | 52 | Co. brk. Sh. 
Mithrax spinosissimus (Lamarck). 
Maia spinosissima Lamarck, Hist. Nat. des Anim, sans Vert., Vv, p- 241, 1818; 2d ed., 
p. 435, 1838. 
Mithraa spinosissimus Milne Edwards, Mag. Zo6l., 1, pls. 2 and 3, 1832; Hist. Nat. 
des Crust., 1, p. 321, 1834. White, Cat. Brit. Mus. Crust., p. 6, 1847. Gibbes, 
Proc. Amer. Assoc. Ady. Sci., 11, p. 172, 1850. Guérin, La Sagra’s Hist. of Cuba, 
p. X, 1856. Stimpson, Amer. Jour. Sci., XXIX, p. 182, 1860; Ann. Lye. Nat. 
Hist. N. Y., vu, p. 188, 1860. (Desbonne and Schramm, Crust. de la Guade- 
loupe, p. 4, ia, viut, fig. 24, 1867.) Martens, Arch. fiir Natur., XXXVI, p. 81, 1872. 
A. Milne Edwards, Miss. Sci. au Mexique, pt. 5, 1, p. 100, 1875. Kingsley, Proc. 
Acad. Nat. Sci! Phila., xxx1, p. 390, 1879 (partim).* Miers, Challenger Rept. 
Zobl., XVU, p. 86, 1886. Aurivillius, K. Sv. Vet.-Akad. Hand, Ba,,23, Lep.oG 
1889. 
*The specimens hee ae abd ie Mr. eeciey as spinosissimus prove to ae Aetaanee 
