MONASCID1A. 



29 



forms. Culeolus Herd., without fine longitudinal bars (Fig. 20), stalk 

 long and thin, dorsal lamina as languets, calcareous spicules in the con- 

 nective tissues in the walls of the endostyle, pharynx, tentacles, 

 etc., abyssal forms. 



Sub-fam. 2. C.yn- 

 thiinae. Sessile or short- 

 ly pedunculated, 

 pharynx with more than 

 4 folds on each side 

 (except Forbes ell a], 

 tentacles branched. 

 Microcosmus Heller. 

 Rhabdocynthia Herd., 

 spicules in the tunic 

 and connective 

 tissues, S. 

 hemi sphere. 

 Cynthia Sav., 

 spicules in the 

 test, mantle 

 and pharynx, 

 in most seas. 

 F o r b e sell a 

 Herd., phar- 

 ynx with 4 

 folds on each t 

 side, Eur. 



Sub-fam. 3. 

 Styelinae. Sessile, 

 rarely in crusted 

 with sand ; pharynx 

 with 4 or less than 

 4 folds on each side ; 

 tentacles un- 

 branched, develop- 

 ment usually in an 

 incubatory cloacal 

 pouch. Styeloides 

 Sluiter, pharynx 

 and alimentary 

 canal absent ( Willey 

 has shown that this 

 is due to eviscera- FIG. 22.Molgula roscovita. 1. The mantle has been 

 Hrm O T M f! ^Q opened on the dorsal side to show the pharynx Br and 



ns, (J.J.M.b., 6U, jJSttil glands.. A atrial aperture, a anus ; B mouthy Br 



per 



pharynx ; o ovary ; o' opening of oviduct ; t testis. 2. Por- 

 tion of pharynx wall of Molgula echinosiphonica, show- 

 ing the complication of the stigmata (from Perrier, after 

 L.-Duthiers). 



p. 145), Malay Arch. 

 Pelonaia Forbes 

 and Goodsir, with- 

 out folds in 



pharynx. Styela MacLeay, pharynx with 4 folds or less, most seas. 

 Styelopsis Traustedt, pharynx with one fold on the right side, gonads 

 on right side only, Eur. BathyoncusHerd., pharynx without stigmata 

 and fine longitudinal bars (Fig. 20), abyssal form. Dendroda Mac- 

 Leay, Glandula Stimp., Polycarpa Heller, sometimes covered with 



