The following is my interpretation of the original instructions.

Abbreviations:

Inc = increase by knitting into the back of the next stitch without dropping it off the left hand needle, then knit into the front as normal.
Yo = yarn over

Pattern:

Materials, gauge and needle size are up to you. To find out how much yarn you need for your project, knit and block one shell. Measure the size and how much yarn you used. You can then use this information to figure out how many shells you'll need to make, and how much yarn that will require.

Cast on 3sts

1st row: k1, inc, k1

2nd row: k2, inc, k1

3rd row: k2, inc, k2

4th row: k3, yo, k3

5th row: k3, p1, k3

6th row: k3, yo, k1, yo, k3

7th row: k3, p3, k3

8th row: knit

9th row: k3, p3, k3

10th row: k3, (yo, k1) 3 times, yo, k3

11th row: k3, p7, k3

12th row: knit

13th row: k3, p7, k3

14th row: k3, (yo, k1) 7 times, yo, k3

15th row: k3, p15, k3

16th row: knit

17th row: k3, p15, k3

18th row: k3, (yo, k2tog) twice, (Yo, k1), 7 times, (yo, slip 1, k1, psso) twice, yo, k3

19th row: K3, p23, k3

20th row: knit

21st row: k3, p23, k3

22nd row: k3, (yo, k2tog) 4 times, (yo, k1) 7 times, (yo, slip 1, k1, psso) 4 times, yo, k3

23rd row: k3, p31, k3

24th row: knit

25th row: k3, p31, k3

26th row: k3, (yo, k2tog) 6 times, (yo, k1) 7 times, (yo, slip1, k1, psso) 6 times, yo, k3

27th row: k3, p39, k3

28th row: knit

29th row: k3, p39, k3

30th row: k3, (yo, k2tog) 8 times, (yo, k1) 7 times, (yo, slip1, k1, psso) 8 times, yo, k3

31st row: k3, p478, k3

32nd row: knit

33rd row: k3, p47, k3

34th row: k3, (yo, k2tog) 10 times, (yo, k1) 7 times, (yo, slip1, k1, psso) 10times, yo, k3

knit 3 rows and cast off.