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The Malacostraca of Natal 
Genus SCHIZOPHRYS, White. 
For this family and genus see Ann. S. Afr. Mus., vol. vi, pp. 290, 
292, LOO: 
SCHIZOPHRYS ASPER (Milne-Edwards). 
1834. IMithrax asper, Milne-Edwards, Hist. Nat. Crust., vol.i, p. 320. 
1838. M. quadridentatus, McLeay, Annulosa of 8. Africa, p. 58. 
1839. Maja (Dione) affinis, de Haan, Crust. Japonica, decas quarta, 
p. 94, pl. G. 
M. (Mithrax) dichotoma, Latr., pl. 22, figs. 4. 
1852. Mithrax asper, Dana, U.S. Expl. Exp., vol. xiii, p. 97, pl. 2, 
figs. 4a, b. 
1867. M. spinifrons, A. Milne-Edwards, Ann. Soc. Entom. France, 
vol. vii, p. 263. 
1884. Schizophrys aspera, Miers, Crust. Alert, p. 197. 
1886. 8S. a., Miers, Rep. Voy. Challenger, vol. xvii, pt. 49, p. 67. 
1895. S.a., Aleock, J. Asiat, Soc. Bengal, vol. lxiv, p. 243 (with 
synonymy). 
1898. SS. a., Alcock. Ilustr. Investigator, pl. 35, figs. 1, la. 
1910. S.a., Stebbing, Ann. 8. Afr. Mus:, vol. vi, p. 292. 
A female specimen from Durban, collected by Mr. Bell Marley, has 
a carapace 28 mm. broad with median length of 30 mm., the surface 
covered with tubercles large and small and setose. ‘The two-branched 
horns of the rostrum have each a tooth on the inner margin, not 
indicated either by de Haan, Dana or Alcock, but Miers mentions 
that ‘the variety spinifrons, A. M.-Edwards” is ‘‘ characterized by 
possessing an accessory spinule on each rostral spine.” ‘This small 
spine or tooth above at the base of the inner branch appears to 
have been the only specific distinction of spinifrons from asper. The 
greatest breadth of the female pleon.is 17 mm., which is just exceeded 
by the length of the smooth slender hand and thumb of the cheliped, 
the movable finger being 6 mm. long. 
Should Schizophrys spinifrons be upheld as a distinct species, that 
should be the name of the Durban specimen. 
In Schizophrys dama (Herbst) the rostral horns are three-branched, 
but the third branch or tooth is on the outer side as shown in Herbst’s 
figure and in Alcock’s Illustrations of the ‘ Investigator’, Crust, pl. 
xxxv, figs. 2, 2a, 1898, although Miss Rathburn, Pr. Zool. Soc., 1914, 
p. 663, writing of ‘the second or posterior spine on the outer margin 
of’ the rostral horn,” by some oversight or misprint adds that “it is 
not shown in the ‘ Investigator ’ figure.” 
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