1972] 
Chickering — Corinna 
371 
rado Island, August 2, 1936 and January 14, 1958. The female is 
unknown. 
Corinna grassima sp. nov. 
Figures 11-16 
Holotype. The male holotype is from Barro Colorado Island, 
Panama Canal Zone, May 17, 1964. The name of the species is an 
arbitrary combination of letters. 
Description. Total length, including much extended chelicerae. 
6.75 mm. Carapace nearly 2.53 mm long; nearly 2.29 mm wide 
opposite interval between second and third coxae where it is widest; 
nearly 0.81 mm tall; with a well defined median thoracic groove; 
finely serrated along ventral margin. Eyes: eight in two rows essen- 
tially as usual in the genus; viewed from above, anterior row slightly 
recurved and posterior row gently procurved ; viewed from in front, 
anterior row slightly procurved. Central ocular quadrangle slightly 
wider behind than in front; wider behind than long in ratio of 
nearly 19 : 16. Ratio of eyes AME : ALE : PME : PLE = 
nearly 6.5 : 5.5 : 5 15. AME separated from one another by 
nearly their diameter and from ALE by slightly more than their 
radius. PME separated from one another by nearly 1.6 times their 
diameter and from PLE by nearly twice their diameter. Lateral 
eyes separated from one another by nearly four-fifths of the diameter 
of PLE. Height of clypeus nearly equal to the diameter of AME. 
Chelicerae: robust; somewhat rugulose; very much extended; very 
gibbous dorsally near base; with well developed basal boss; pro- 
margin of right fang groove apparently with only two teeth and 
retromargin with five; some irregularities with teeth along left fang 
groove; some variations noted among paratypes. Maxillae: only 
slightly convergent; robust; nearly twice as long as wide; quite 
typical of the genus in general. Lip: about half as long as maxillae; 
a little wider near base than long; sternal suture procurved. Ster- 
num: surface finely granulate; typical of the genus in general; mod- 
erately convex; longer than wide between second coxae in ratio of 
nearly 67 : 58; anterior margin quite distinctive (Fig. 11; posterior 
end sharply pointed and reaches just opposite bases of fourth coxae 
which are separated by nearly 0.4 of their width; surface finely 
granulate and with numerous short hairs. Legs: 4123 in order of 
length; all legs with spines. Palp: essential features shown in Fig- 
ures 12-14; tibial apophysis simple but distinctive; bulbar canali- 
culus intricately convoluted essentially as in Corinna robusta Chick- 
ering and Corinna casueta sp. nov. Abdomen: essentially typical of 
males of the genus; with a short, rather poorly outlined dorsal, 
