200 BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE LXVI— Continued. 



Fig. 119. Creseis {Hyalocijlix) striata Rang, showing animal extended, eularged. 



120. Corolla calceola Verrill, with extended animal in situ, two thirds natural 



size. This species and C. spectahilis Dall, of the Pacific, belong to the 

 same group. The former was referred to Gleia, Forskiil, by Dr. Tehe- 

 neer in his description of the Challenger Pteropods, probably on ac- 

 count of the poor state of his material. But C. spectahilis has precisely 

 such a "shell" as C. calceola, which does not resemble the "shell" of 

 Gleia, and has been taken with its " shell" in the Santa Barbara Chan- 

 nel, California. The genus CymhuUoims Pelscneer, being of later date 

 than Corolla, will therefore fall into the synonymy of the latter name. 



121. Sponf/iohranchia auslralis Orbigny. This figure represents the adult form 



of a tropical Pteropod not yet found on our coast, though certain 

 larvce, perhaps of Noiohranchwa, have been referred to it. 



122. Clione limacina Phipps. 



Figures 112 and 113 are from Biuney's Gould. The remarks applying to the others 

 Avill be found under Plate LX. 



PLATE LXVII. 



Fig. 63. Argonauta argo Linnd, var. amerieana Dall. Animal removed from the 

 shell and somewhat contracted by immersion in alcohol. 

 63 a. The same, front view of shell. 

 63 b. The same, side view of shell. 

 The average Argonauta argo of the Mediterranean has from two to three times as 

 many radial folds and carinal nodules as the variety here figured. It is also more 

 compressed and narrow, and the marginal rib on each side of the aperture is less 

 prominent and usually is merged in the margin imperceptibly and does not stand 

 out laterally at all. There are, doubtless, variations in these characters, but on the 

 whole the Antillean and American form seems sufficiently constant for the latter 

 to receive a varietal name. 

 For remarks on the figures, see note under Plate LX. 



PLATE LXVI II 



Fig. 1. Teredo dllatafa Stimpson, interior and exterior views of valves ; pallets. 



2. Teredo norvegica Speugler, enlarged ; interior view of valve; the two valves 



united; pallets. 



3. Lyrodns chlorotica Gould ; interior and exterior view of valves, and the two 



pallets. 



4. Spirilla Feronii l.ama,rc^; shell. 



.5. Kellia siiborlicularis Montagu ; natural size ; hinge line and umbo magnified. 



6. Montacuta elevafa Stimpson. 



7. Turtonia minuta O. Fabricius. 



8. Nucula tenuis Montagu ; somewhat enlarged. 



9. Pholas (Barnea) costata Linu6. 

 10. Zirpluea crisjyata Leach. 



The figures of which this and the remaining plates (LXIX-LXXIV) are composed 

 are from Mr. W. G. Binney's edition of Gould's Invertebrata of Massachusetts, drawn 

 by Prof. E. S. Morse, and borrowed for the purposes of this publication from the 

 Smithsonian Institution. 



