of Smith Africa. 231 



0-jven by Stebbiug iu 1906, by which Thomson's species can be dis- 

 tinguished from Koyer's, appear to be constantly correlated. The 

 degree of approximation of the lobe of the 5th joint of 1st gnathopod 

 g to the apex varies, as does also the expansion of the 2nd joint of 

 the 2nd gnathopod and the seta on finger of peraeopods 1-5. 



The most constantly correlated characters (and even these are not 

 always found together in the same specimen) appear to be: the 

 solitary spines on 4th joint of peraeopods 3-5, marginal spines on 

 both rami of 1st uropod and the 3rd pleou segment with the postero- 

 inferior angle slightly produced. But solitary spines on 4th joint of 

 peraeopods 3-5 may occur with spines on only the inner ramus and a 

 quadrate postero-inferior angle to pleon segment 3. Other combina- 

 tions of these supposedly distinguishing characters also occur. 



The following points about the South African species may be 

 mentioned : Neither the 2nd nor 3rd joints of 1st gnathopod are lobed, 

 lobe of 5th projecting a little beyond 4th, furnished with short spines 

 and longer setae ; 2nd joint of 2nd gnathopod with a straight-edged 

 apically quadrate keel on anterior margin but no projecting rounded 

 lobe, 3rd with a small lobe, hind margin of 4th joint of peraeopods 3-5 

 with 4 spines either solitary or each set in a bunch of setae, anterior 

 margin of 6th with 4 (peraeopod 3) or 5 (peraeopods 4 and 5) spines, all 

 of the same size and not apically serrulate, each set in a group of setae ; 

 setule on inner apex of finger varying from very delicate to fairly 

 strong ; hind margin of 2nd joint of peraeopods 3-5 with slight 

 setuliferous idents, posterior margin in }>eraeopod 5 rather deeply 

 excavate between the rounded postero-inferior angle and 3rd joint. 



Length : Up to 17 mm. , 14 mm. ? . 



Colour : Dark reddish or greenish brown, with squai'ish dorsal 

 lighter spots. 



Locality : Table Bay (Cape Town). (Dr. W. F. Purcell, K.H.B.) ; 

 False Bay (Buffel's Bay) and St. James. (K.H.B.) ; East London. 

 (R. M. Lightfoot.) $ $ , ovigerous ? ? and young; Port Elizabeth. 

 February, 1915. (Mrs. Paterson.) (S.A.M. Nos. 1263, A2516, A3051, 

 A3052,and A3282.) 



Geogr. Distribution : Valparaiso (Kroyer : 0. grandicornis, Dana': 

 A. verticillata) ; Otago, N.Z., Macquarie Is. and the Snares (Thomson 

 and Chilton : N. novaezealandiae) ; G-ough Island (Chilton : H. grandi- 



Most of the East London specimens belong to the form novae- 

 zealandiae, but examples of this form occur also among the Cape 

 Peninsula specimens, which are mostly grandicornis, and vice versa. 

 Specimens which are intermediate and combine the characters of the 



