136 DEIMATIDAE. 



media because of a fairly close similarity in calcareous particles but whether 

 the dorsal appendage and the pedicels are also similar, it is out of the question 

 to determine. They certainly add nothing to our knowledge of the species. 



Station 4647. Eastern Tropical Pacific, 4° 33' S., 87° 42' 30" W.. 2,005 fms. Bott. temp. 35.5°. Lt. gy. 



and br. glob. oz. 

 Station 4658. Eastern Tropical Pacific, 8° 30' S., 85° 35' 36" W., 2,370 fms. Bott. temp. 35.3". 



Fne. gn. m., mang. nod. 

 Station 4672. Peru: southwest of Palominos Light House, 88 miles. 2,845 fms. Bott. temp. 35.2°. 



Fne. dk. br. infns. m. 



Ten specimens. 



Peniagone setosa. 

 Peniagone vitrea var. setosa Ludwig, 1893. Bull. M. C. Z. 24, p. 109. 



Comparison of the present specimen with a cotype of Ludwig's variety 

 has satisfied me that the two are identical and that both are perfectly distinct 

 from vitrea Theel. I therefore raise the variety to full specific rank. It is 

 easily recognized by the abundance and large size of the spicules, the curved 

 arms of which are 300-530 n in length, with the outwardly directed spines, 300- 

 470 n. The Albatross specimen is lighter and less gray than the cotype and 

 the crest is much less evident. The length is rather more than 50 mm. 



Station 4658. Eastern Tropical Pacific, 8° 30' S., 85° 35' 36" W., 2,370 fms. Bott. temp. 35.3°. Fne. 

 gn. m., mang. nod. 



One specimen. 



Peniagone vitrea. 

 Theel, 1881. Challenger Hoi., pt. 1, p. 50. 



Although the specimen at hand is badly rubbed and lacks its tentacles, and 

 although the integument is not at all glassy or "hard, brittle and rough," I 

 feel little doubt about the identity, for the shape of the body, the arrangement 

 of the pedicels and the calcareous particles agree well with Theel's description. 

 The color is yellowish white and the body-wall is quite opaque. The body 

 posterior to crest is 50 mm. long, anterior to crest is 30 mm. and its width is 

 25 mm. The crest is 25 mm. high and while its margin is irregular there are 

 no definite four projections visible. There is a note with the specimen indicating 

 that the color in life was "pink." 



Station 17. Eastern Tropical Pacific, 0° 50' N., 137° 54' W., 2,463 fms. Bott. temp.? Lt. yel.-gy. 

 glob. oz. 



Deimatidae. 



Oneirophanta mutabilis. 

 Theel, 1879. Bih. K. Sven. Vet. Akad. Handl., 5, no. 19, p. 6. 



The present series confirms Theel's statements concerning the diversity 

 shown by this species. I doubt very much the validity of the species which 



