28 
THE VOYAGE OF H.M.S. CHALLENGER. 
developed, with somewhat turgid palms and with the fingers incurved, and acute at the 
apices. The ambulatory legs are slender and moderately elongated. 
But two species of this genus have been described ; Lispognathus thomsoni (Norman), 
whose remarkable geographical and bathymetrical distribution are referred to below, and 
Lispognathus furcillatus, A. Milne Edwards, dredged at the Island of Grenada, in 291 
fathoms. 
This genus is allied to Anamathia (among the forms with well-developed rostrum), 
and, in my classification of the group, must be placed in the vicinity of that genus, 
from which, however, it is at once distinguished by the six-jointed post-abdomen and 
the form of the merus of the outer maxillipedes. It is also structurally very nearly 
allied to Inachus and Achseopsis, but from both these types it is distinguished by the 
well-developed rostral spines. 
Lispognathus thomsoni (Norman) (PL Y. fig. 2). 
Doryiichus thomsoni , Norman, in Wyville-Thomson’s Depths of the Sea, p. 174, fig. 34, wood- 
cut, 1873. 
Lispognathus thomsoni, A. Milne Edwards, Comptes rendus, vol. xciii. pp. 878, 932, 1881 ; 
transl. in Ann. and Mag. Nat. Hist., ser. 5, vol. ix. pp. 38, 42, 1882; Rapport sur 
la Faune sous-marine dans les grandes profondeurs de la Mediterran^e and de 
TOcean Atlantique, in Archives des Missions Scientifiques and Litteraires, ser. 3, ix. 
pp. 16, 39, 1882; Recueil des Planches de l’Expeditioin du “ Travailleur,” pi. iii. 
(inedit es). 
Agulhas Bank, off Cape Agulhas, South Africa, 150 fathoms; lat. 35° 4' 0" S., 
long. 18° 37' 0" E. (Station 142); four adult females and a small male. The females 
are very robust. 
An adult female from the Agulhas Bank has the following dimensions : — 
Adult ?. 
Lines. 
Millims. 
Length of carapace and rostrum, nearly . 
7 
14-5 
Breadth of carapace, . . . . . 
41 
9-5 
Length of a chelipede, nearly . . . . 
94 
19-5 
Length of first ambulatory leg, nearly . 
20** 
42 
The male, with imperfect ambulatory leg, is 
follows : — 
much smaller, and 
measures 
Adult $ . 
Lines. 
Millims. 
Length of carapace and rostrum, nearly . 
4 
8 
Breadth of carapace, .... 
2 i 
5-5 
Length of a chelipede, .... 
5 
11 
I can observe no distinctions of note between North Atlantic specimens of this species 
and the Challenger specimens from Agulhas Bank, except that the former (male) examples 
