162 



ROBERT TRACY JACKSON ON ECHINI. 



Table of Typical Ocular Plate Arrangement and Variation in the Centrechinoida (continued). 



p. 



a 



3 



10 



48 



291 



1,163 



60 

 55 



Suborder CAMARODONTA (continued). 



Slrongylocenlrolus alhu 

 Patagonia. 



39 



12 



56 

 179 

 120 



24 



2,063 



Strongylocentrotidae. 



Pseudoboletia indiana (Michelin). 

 Mauritius; Isle de la Reunion. 



Sphaerechinus ptdcherrimus A. Agassiz. 

 Japan. 



Sphaerechimis granulans (Lamarck). 

 Mediterranean; Azores. 



Stro7igylocentrotiis liiridus (Lamarck). 

 Mediterranean; Fayal; England. (Text-figs. 128-130, 

 176.) 



(Molina). 



Strongylocentrotus fragilis sp. nov. 

 Catalina Islands, California; off California and Ore- 

 gon coasts. (Text-fig. 176.) 



Slrongylocenlrolus mexicanus A. Agassiz. 

 Cape St. Lucas. 



Slrongylocenlrolus tuberculalus (Lamarck). 

 Japan; Sidney, Australia. 



Slrongylocenlrolus depressus A. Agassiz. 

 Japan and loc. (?) 



Slrongylocenlrolus drbhachiensis (O. F. Miillcr). 



See tabulation of 27, 417 specimens exclusi\'e of devel- 

 oping series, p. 143. The percentages only are given 

 here. (Text-figs. 135-149.) 



Slrongylocenlrolus eurylhrogrammus (Valentin). 

 Australia. 



Slrongylocenlrolus franciscanus A. Agassiz. 

 California; Washington. (Text-figs. 151-153, 106.) 



Slrongylocenlrolus purpuralus (Stimpson). 

 California; Puget Sound. (Text-fig. 176.) 



Slrongylocenlrolus gibbosus (Valentin). 

 Payta, Peru. (Text-figs. 154-157.) 



876 



53 

 32 



13 



0.004 



03 



"3 

 O 



1 



2 



IL 



195 



2 

 1 



29 

 16 



915 



220 



26 



S 

 3 



17 

 1 



> 



C3 



"3 

 O 



0.04 I 



100* 

 10* 



98 

 47 



59 

 258 



50 



15 



56 

 31 



S3 

 5 



92 

 36 



100 

 12 



94 



93 



52 



S7 

 156 



77 

 93 



31 



765 



c 

 > 



3 



o 



> 

 > 



o 



o 



3 

 1 



3 



n 



20 



22 

 26 



i 

 1 



56 



0.03 



17 

 4 



C3 





9^ 

 25 



15 



IS 



1.2 



79 

 19 



69 



* Italic numerals represent percentages, Arabic numerals the number of specimens observed. 



