130 University of California Publications in Zoology [Vol. l\ 



body is measured from base of proboscis to base of caudal seg- 

 ment; span of processes II is the distance measured across the 

 body between the tips of leg-bearing processes of legs II ; leg III 

 is the approximate length of leg III, not including the leg- 

 bearing process; to get the "extent" as used by Cole (1904), 

 add twice the length of "leg III" to the "span of processes II". 

 All measurements have been taken with an ocular micrometer. 

 Slight inaccuracies in measurement given in my earlier pages 

 (Hall, 1912, pp. 92-99) have been corrected in this paper. 



Ammothella bi-unguiculata Dohrn var. califomica Hall 



Described by me (see Hall, 1912, p. 93) from twenty speci- 

 mens taken at Laguna Beach, during July and August, 1911. 

 Over fifty specimens of this species were taken in the summer of 

 1912 under stones in the same locality. Corrected measurements 

 are given below. 



Measurements op A. bi-nii;juicimt<i var. califoniica in Millimeters 

 Tvpe Maximum Minimum 



id 2 <i 9 



Length 2.85 2.. 5 2.8.5 2.4 1.38* 



Proboscis 1.1.5 .9 1.15 .96 .6 



Body 1.3.5 1.15 1.35 1.2 .63 



Caudal segment 3 .24 .3 .25 .15 



Span of Process II 66 .75 .66 .45 .35 



Leg III (approximate) 4.5 3.5 4.5 2.8 1.5 



* Immature. 



Ammothella spinosissima Hall 



Described by me (see Hall, 1912, p. 95), from a single speci- 

 men which was swept from Fucus, July, 1911, at Laguna Beach. 

 During the summer of 1912 two specimens of this species were 

 taken, one under a stone, the other swept from Fucus. These 

 specimens differ so little in size from the type that I give the type 

 ineasurements only, in millimeters, as follows: Length 3.6; 

 proboscis 1.35; body 1.5; caudal segment 1.05; span of proces- 

 ses II-l. 8; legs III (approximate) 7. 



