ABBREVIATIONS 



a. — anus. 



a. I. — atrial languet. 

 a. 0. — atrial orifice. 

 a. s. — atrial siphon. 



a. t. — atrial tentacles. 



b. h. — budded branchial sac. 

 b. f. — branchial folds. 



6.1. — budded intestine. 

 br. 0. — branchial orifice. 

 br. s. — branchial sac. 

 b. s. — branchial siphon, 

 c. — caecum. 



d. i. — Degenerating piece of intes- 

 tine. 

 d. 1. — dorsal lamina. 



d. In. — dorsal languet. 

 e. — esophagus. 



e. c. — esophageal collar. 



e. a. — ectodermal ampullae. 

 eti. — endocarp. 

 end. — endostyle. 



e. p. — ectodermal process. 

 f.m. — food mass. 



f. p. — fecal pellets. 

 g. — gland. 



g. g. — ganglion gland. 

 gh — ganglion. 



ft. — heart. 



luj. — hypophysis. 



i. I. V. — internal longitudinal vessel. 



inf. — infundibulum of branchial sac. 



int. — intestine. 



i. p. — incubatory pouch. 



i. t. — island of test. 



I. — liver. 



m. — mantle. 



m. b. — muscle band. 



m. i. — mother intestine. 



m. s. — mother branchial sac. 



0. — ovary. 



o'. — rudimentarj' ovary. 



or. — ovum. 



ov. d. — oviduct. 



p. g. — peripharyngeal groove. 



p. gl. — p_yloric gland. 



p. s. — pigment spot. 



p. t. V. — primary transverse vessel. 



»". — renal organ. 



s. — stomach. 



sp. — spinule. 



s. t. V. — secondary transverse vessel. 



t. — testis. 



t. t. — trail of test. 



tst. — test. 



V. — velum. 



V. d. — vas deferens. 



y. z. — young zooid. 



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