d on its posterior part there is a strong t pot- hi ike protuberance occupying 
bout one-third its area.** A strong triangular tooth pointing forward, on 
subhepatic region, and a smaller tooth at /interior extremity of branchial 
region on anterolateral margin. “ ^ The Il iauanthas socdbciisasaxjcxx have either 
no spines, or only one spine ( t hei^®^) on either side of the front, 
he Leucosias have none in the ? and ^rudimentary one| in the 
T said to him, ’’There’s a good difference. It shows clearly on 
Jail specimens. “ He said, "Well, you can* t talk about spines when you don 1 1 
“know what to call them," He’s always got some good reason why he can’t 
<use his head. He has maintained all along that he doesn’t understand crab 
\t erm i no logy* I don’t either, but when I sit down with a crab in one hand 
and a diagram in the other I can learn itl 
l 
r So here’s the key which I evolved, and I’ll stick to itl It 
fehows plainly in all our specimens. It is true that h k we have only one 
specimen^ of C. asper . but it is the only American species, anyway, and so 
the key will certainly be good for American species, 
1 
B . Posterior half of carapace wihh seven spines. Anterior half 
Calli dactvlus . 
,2 
of caraoace with three spines on either side 
e * m * 
Posterior half of carapace with not more than five spines, 
usually three or four. Anterior half of carapace with no 
spines or with one spine cn either side. 
Posterior half of carapace with three soines. ...... . Iliacantha . 
Posterior half of carapace with four spines 
(exceptionally showing trace of a rudimentary 
i .1 £ in ^ euco s i a «> 
Is it all right? I do hope so. When I finished it, I said to him, ’’That 
looks all right to me.” And he said, “Well, it’s the best I_ (!) can do»“ 
Anyway, I hope it looks all right to you. 
It has been snowing steadily for two days. It’s very nasty 
underfoot. I talked to your wife this morning. She said she had the AAA. 
man come out and put chains on the car and she left it sitting at the foot 
of the hill. 
I had a letter from Fred Saturday. His wife has gone back to 
California! He said she was going to visit her folks for a couple of months 
until he goes back to be a funny one. It simplifies the 
matter of entertaining Fr ecL^ nowever • When I wrote him I had said, “I hope 
you and your wife can have dinner with me one night while you^e here.” He 
rep 1 led and said his wife had gone home, but, please, couldn’t he accept the 
dinner invitation any way, because he isn’t getting very good meals since she 
left. I told Mrs. Schmitt this morning that I want her to come to dinner, 
too, that night. She said, “Oh, no. You can have a nice little two-some. “ 
I said, ’’Not on your life. I want you to come, and both the children if 
they’d care to. I want protection! “ Not that it would really worry me in 
the least, but I’m not going to give any man’s wife an uneasy moment. 
I dan hold John’s crabs until you get back. There are 25 species, 
