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THE 0PHIURID7E 



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in some species there arc two pairs of pores, the second at the inner edge of 

 the third ventral plate. One pair was found besides in 0. variegaia, in 0. 

 hreiylsjma Say, and 0, Januani Ltk.; two pairs were found in 0. hrevicauda 

 Ltk., 0. cmereum M. Ti\ {=cmtillanim JM^.), lacertosa Lmk., rithimnda Ltk., 

 and 0. apprcssa Say (=vircscens Ltk.). Possibly this may be of systematic 

 importance. 



We should not be much surprised if 0. h'cvispina Say {z==z scrjmis Ltk.) and 

 0. Ilolmesii Lym. should turn out to be the same species as 0. variegala. 

 Between 0. hrcvisp)ina and variegata there seems to be no difference except in 

 the color; but as the color is highly variable in these forms, that will scarcely 



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be sufficient for maintaining them as two species. Of 0, Holmesii^ Lyman* 

 says, "This species stands between 0. hrevispina and 0, olwaccar In the 

 " Challenger " Monograph he makes 0. hrevispina and 0. olivacea synonyms, 

 but maintains 0. Ilolmesii as a distinct species, without giving further 

 reasons for it. It seems that 0. Ilohncsii is only a larger specimen of (?. 

 hrevisimia ; all these species would thus be reduced to one, whose name 

 should be 0. hrevispina Say. But we cannot say that with certainty for 

 want of material for comparison. 







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3. Ophiozona contigua n. sp. 



Plate VI. Figs. 10-13. 



Mouth shield a little longer 



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Diameter of disk, 10 mm. ; width of arms close to disk, 1.8 mm. ; length 

 of arms, 35 mm. Five to six mouth papillae on each side of the mouth 

 angle ; the outer one very small, the next one much larger than the others, 

 rounded ; the three or four inner ones more or less conical, as is the one on 

 the apex of the jaw. The teeth are pointed. 

 than broad, with an angle wuthin and outer edge rounded ; lateral sides a 

 little restricted throuo:h the i>:enital slits: the outer end is the widest. Side 

 mouth shields short and rather wide, meeting within, almost equally broad 

 in their wdiole length. 



First ventral plate very small, five-sided; those beyond a little longer 

 than wide, in mutual contact almost, but not quite, to the end of the arm. 

 Their inner end is truncated, their outer edge strongly curved, or with a 

 rounded peak. Inner laterals re-enteringly curved, outer laterals restricted 

 through the tentacle pores. Farther out on the arm, before they are sepa- 



*Opliiundio and Astropliytidsti, Old and New. TUusU-. Catalogue Mus. Coinp. ZooL, Vol. I. p. 22. 



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