W KNNER BIOLOGY OF DEEP-SEA LOBSTERS 



100 

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n:2l n:62 11 = 70 



m 



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£ 90 



cr 



u 80  



a. 



70 - 

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10 



^ m 



n:7 n:94 



M 



21-25 26-30 31-35 36-40 



SHORT CARAPACE LENGTH (mm) 



ntermediote Gravii 



Ripening tl I t 1 Spent 



Resting 



Figure 5. — Percent occurrence of ovigerous and nonovigerous 

 Stereomastis nana in ovarian development stages for five length 

 intervals. 



100- 

 90  

 80 • 

 70  

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 ' 20 

 10 



100 

 I 90 

 I 80 

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n:IO n:22 n:8 



n:58 n-.2l 



I 



i 



I 



n=l3 n=l8 



WA 



m 



MAY/JUNE JULY SEPT NOV JAN 



MONTHS OF COLLECTION 



□ 



Intermediate 



Spent 





l« 



Figure 6. — Percent occurrence of ovigerous and nonoviger- 

 ous S/(?rcomas//s nana in designated ovarian development stages 

 bv month of collection. 



All individuals were sexually mature with sper- 

 matophores present within the vas deferens, and 

 there were also some males at each season with 

 spermatophores protruding from the gonopores 

 I Table 6i. 



Analysis of stomachs from 438 S. nana showed 

 Si^/f of them were empty. Among the remainder, 

 3% contained sediment with some Foraminifera, 

 2'7f contained either polychaete fragments or crus- 

 tacean body parts, and 'i"c had unrecognizable 

 paste. Single occurrences offish scales ( VA ), shell 

 fragments (IVf), and one entire fish (Myc- 

 tophidae?) ( 1% ) were also noted. 



Stereoniasth aiilptii (Smith) 



Stereomastis sculpta has a wide geographic dis- 

 tribution, captures having been reported from the 

 Atlantic and Indian Oceans, the Arabian, 

 Mediterranean, and Caribbean Seas, and the Gulf 

 of Mexico. It has been reported off the east coast of 

 North America from lat. 35°49'-43'10' N at depths 

 of 460-1,568 m. It has not been reported from the 

 Pacific Ocean, where it is replaced by the sub- 

 species S. sculpta pacifica (Firth and Pequegnat 

 see footnote 4). Roberts ( 1977) found S . sculpta to 



441 



