NO. 1 DICKINSON : SPONGES OF GULF OF CALIFORNIA 25 



Carmia f ascifibula (Topsent) 

 Plate 41, Fig, 82 ; Plate 42, Figs. 83, 84 



Esperella f ascifibula Topsent, 1904, p. 210. 

 Mycale f ascifibula de Laubenfels, 1932, p. 70. 

 Cartnia f ascifibula de Laubenfels, 1936, p. 118. 



Diagnosis. — The specimen of this sponge from the Gulf of California 

 is greenish white in alcohol and cartilaginous in consistency. There is a 

 distinct ectosome 100 ju, thick, which is detachable and covers subdermal 

 cavities. Openings about 65 jx in diameter can be made out. These are 

 probably pores. No oscules were found on this specimen. 



The dermal spicules are tylostyles 10 /a by 450 {i to 500 /a. The 

 principal spicules are styles of the same size. It is difficult to distinguish 

 the two categories, as they are the same size and the tylote modification 

 has every intennediate grade. 



The microscleres are two ranges of palmate anischelas 50 ix and 20 /* 

 to 22 /i, sigmas about 250 ii long and 50 ju, to 60 /* wide, as well as tricho- 

 dragmas and toxas. 



Holotype. — Paris. 



Type locality. — Azores. 



Distribution. — Cosmopolitan. 



Material examined. — 

 Sta. 557-36 Isla Partida 3- 8-36 90 m 



Remarks. — The double-headed tylostyles mentioned in the original 

 description do not seem to be present in this specimen ; otherwise, it agrees 

 precisely. 



Genus MIGROTYLOSTYLIFER Dendy 



Microtylostylifer partida, new species 



Plate 43, Figs. 85, 86 ; Plate 44, Fig. 87 



Diagnosis. — The consistency of this sponge is corklike, the color drab 

 throughout. It is very heavily hispidated. The average length of the pro- 

 truding spicules is more than 3 mm. Protuberances about 3 mm high by 

 2 mm at the base are visible through the spicule plush. There are twenty 

 of them on the specimen. 



A distinct cortical layer, about 600 [x. thick, is present. It is very closely 

 held. Pores and oscules, if present, are not visible because of the very 

 heavy spicule brush. A cross section of the specimen shows it to be fleshy 

 with gross cavities averaging 300 ju,. 



Three types of megascleres are present. The dermal spicules are 

 peculiar tylostyles, which have a much thickened shaft. The central 



