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segment 9-5, of second segment 12-8, of third segment 13-6, of fourth seg- 
ment 14-8, of fifth segment 14-5, of vesicle 6-25, breadth of first caudal 
segment 2-1, height of second segment posteriorly 2-75, of fifth segment 1-7, 
breadth of hand 5-6, breadth of carapace 10 8. Pectinal teeth 15. 
The slenderness of the hand, vesicle and tail, especially of the adult 
male, is a distinguishing feature of graciloides. 
A third variety of this species I now describe under the name of 
H. trichiurus var. "caffer (Pis. XXI, XXXI, and XXXII, figs. 34, 90 and 96 ; 
also text-fig. 5 (3) ). It is known to me from Keilands (Fr. A. Schweiger), 
Kei Bridge (H. Kumm), and Shawbury (Miss J. Hoodless). In this variety 
the carapace is deeply excavated in front, the vesicle and hands are bigger 
than in graciloides, the caudal segments are deeper and slightly stouter. 
In the female the fifth caudal segment has its superior margins almost 
smooth, or at any rate only feebly denticulated. 
Measurements (of male from Keilands and female from Kei Bridge). — 
Total length, M. 140, F. about 115 ; length of carapace, M. 12-9, F. 14 ; of 
first caudal segment, M. 12, F. 8 ; of second, M. 16, F. 10-3; of third, 
M. 17-3, F. 10-6 ; of fourth, M. 19, F. 11-8 ; of fifth, M. 17*8, F. 12-25 ; of 
vesicle, M. 8-5, F. 8-5 ; of hand-back, M. 13, F. 15 ; of movable finger, 
M. 13-8, F. 15-6 ; of last tergite, M. 10, F. 10 ; breadth of hand, M. 7-8, 
F. 9-5 ; breadth of last tergite, M. 9-9, F. 117 ; of first caudal segment 
posteriorly, M. 2-9, F. 3 ; height of first caudal segment posteriorly, M. 3*65, 
F. 3-25 ; of second segment posteriorly, M. 3-8, F. 3*4 ; of fifth segment, 
M. 2-5, F. 2-5 ; of vesicle, M. 3-1, F. 3-25. Pectinal teeth, M. 19-23, F. 
14-16. 
A fourth variety occurs in Natal, for no doubt H. pallidus Poc. (Ann. 
Mag. Nat. Hist. 7, 2, p. 198), is only a form of this species. The type of 
jjallidus is quite immature, and until adult material is available from the 
same locality (junction of Blaauwkrantz and Tugela Eivers) the characters 
of pallidus must remain uncertain. The Natal Museum has some immature 
specimens of trichiurus from Umfolosi, Zululand, and we have an adult 
female of this species from Weenen (H. L. Bulcock). 
H. MINOR Purcell, Ann. S. Af. Mus. i, p. 436, 1899. 
This species, and its variety ced,ri Pure, are only known through speci- 
mens found in the divisions of Calvinia and Clanwilliam. 
Key to the South African Species of the Genus Hadogenes. 
A. Carapace ivith practicalli/ straight anterior margin. 
(1) Sides of vesicle finely granular; terminal tooth of superior 
caudal crests only slightly enlarged, not subspiniform, 
except sometimes that of the third segment in males ; first 
