1880.] NATURAL SCIENCES OF PHILADELPHIA. 143 



11. Gelasimns arouatus De Haan. PI. ix, f. 10. 



Ocypode ( Gelasimns) arcuata De Haan, Fauna Japonica, Crustacea, p. 



53, PI. VII, f. 2 (1835). Gelasimns arcuatus M.-Edw., Ann. Sci. 



Nat. Ill, xviii, p. 146 (1852) ; (?j Krauss, siid Afrikanische Crus- 



taceeu, p. 39 (1843) ; A. M.-Edw., Nouv. Arch, du Mus., ix, p. 373, 



(187?,'. 

 Carapax with sides carinate, carina acute, scarcel.y granulate; 

 inferior margin of orbit granulate. Meros of larger cheliped, 

 above concave, below flat ; internally with an acute granular ridge. 

 Carpus externally convex, above flat, hand twice the breadth of 

 the carapax , fingers compressed, smooth, externally longitudinally 



sulcate (De Haan). 



Japan (De Haan). JSew Caledonia (A. M.-Edw.). [?J Natal Bay 

 (Krauss). 



12. Gelasimns tetragonon Ruppell. PI. ix, f. 11. 



Seba Thesaurus, iii, PL XIX, f. 15. ? Cancer serratan Forskal, Descr. 

 Animalium, etc., p. 87 (1775). Cancer tetragonon Herbst 1. c, i, p. 

 257, PI. XX, f. 110 (1790). Gelasimns tetragonon Ruppell, Beschrei- 

 bung und Abbildung 24 Krabbeu des rothes Meeres, p. 25, PL Y, 

 f. 5 (1836) ; Edw., Hist. Crust., ii, p. 52 (1837) ; Ann. Sci. Nat. Ill, 

 xviii, p. 147, PI. Ill, f. 9 (1859) ; White, Cat. B. M. Crust, p. 3G 

 (1847) ; Guerin, Voyage Coquille, p. 10 (1839') ; Heller Reise der 

 Novara, p. 37 (1868) ; Hilgendorf in van der Decken, p. 84 (1867) ; 

 Kossman Reise nach rothen Meeren, p. 52 (1877). Gelasimns 

 duperreyi Gueviu, 1, c, PL I (1826) ; Dana, U. S. Ex. Ex. Crust., p. 

 317 (1852). Gelasimns desjardinii Guerin, MS. Gelasimns tetra- 

 gonon var spinicarpa Kossmann, 1. c, p. 52. Kossman gives a 

 reference to a paper by Poulson, but as the title is written in Russian 

 I have not been able to verify it. 



Carapax strongly arcuate, front not expanded below the eyes, 

 Meros of the larger cheliped with the upper margin terminating 

 distally in a strong spine, carpus smooth, the inner margin acute, 

 its basal portion sometimes expanded into a strong tooth. Hand 

 compressed, externally finely granulate, a shallow pit with coarse 

 punctffi near the base of the thumb ; internally granulate but 

 without tubercular ridges ; thumb with two prominences on the 

 distal lialf ; the finger regularly tapering. 



Mauritius ! Dr. WiLson, Guerin's Collection ; Tongatabou ! Wilkes 

 Expedition; Tahiti! A. Garrett ; Sandwich Is ! Dr. W. N. Jones 



' The title page of the volume bears the date 1830, but the introduction 

 to the Crustacea and Aiachnida is dated "15 Novembre, 1838," so that it 

 is probable that the volume did not appear complete until 1839. The 

 plates bear date 1826. 



