igii.] S.Kemp: Crustacea Anostraca. 221 



valle}' of the Altai Mountains and from the vicinity of Sinjucha in 

 the same range. 



The only differences that I am able to detect between male 

 C. hohrinskii and the figures and description which von Daday has 

 given of C. altaicus are as follows : — 



The large spine-like process on the under surface of the proxi- 

 mal segment of the second antennae, near its base, is longer, 

 considerably more than half the length of the segment. In the 

 trilobate process at the base of the second antennae the edge of the 

 triangular emargination between the two basal laminae is entire — 

 not denticulate as shown in von Daday's fig. 22 c. Von Daday 

 states that the apex of the ultimate antennal segment is truncate 

 or bilobate : in the types of C. bobrinskii it is truncate. The penis, 

 when everted, has the same form as in C. altaicus, but the spinulose 

 process at the base is distinctly broader. 



Apart from the details mentioned above the second antenna 

 with its curious pedicled digitate process at the base of the ultimate 

 segment agrees precisel}' with von Daday's account ; the trunk-limbs 

 correspond closely with his figures and the characters which dis- 

 tinguish C. altaicus from its near allies C. turkestanicus and C. 

 sinensis are well shown. 



Von Daday was unable to examine an}' females of this species 

 and the single female specimen from the Chakmaktin Lake is un- 

 fortunately in very poor condition. It is, however, clear that this 

 sex shows much affinity with Thiele's C. sinensis. On each of the 

 first two abdominal somites there is a stout outstanding spine on 

 either side and on each of the succeeding somites except the last 

 there is a pair of spines on the hinder margin, directed posteriorly 

 and diminishing in size from before backwards. The egg-sac is as 

 long as the first five abdominal somites combined and its aperture 

 is terminal, transverse and V-shaped in lateral view. 



The specimens are so contorted that accurate measurement is 

 an impossibility. It seems, however, that they could not have 

 exceeded 12-13 mm. in length. Von Daday's two specimens mea- 

 sured 12 and 19 mm. respectivel3^ 



C. bobrinskii is known only from the Pamir and Little Pamir. 



Those from the latter region were found at an elevation of about 



13,000 ft. o ♦ . . I' /T • \ 



^' Branchipus stagnahs (Lmn.). 



1910. Branchipus stagnahs, von Dada}^ Ann. Sci. Nat. Zool. (g), 



xi, p. 312, fig. 54, a-h. 



This widely-distributed species occurs in Europe, N. Africa 

 and Asia, extending eastwards as far as Sind. The specimens from 

 Sind, the onl}^ locality in the Oriental region from which the species 

 has been recorded, were collected by Mr. A. W. Murray and are 

 preserved in the Indian Museum ; the precise date and circumstances 

 of their capture are not available. Gurney in 1907 ^ recorded 

 these examples under the name of B. pisciformis , Schaeffer. 



J Gurney, Journ. A. S. B. (11s.), ii, 1907, p. 275. 



